CN106034077B - A kind of dynamic route collocating method, apparatus and system - Google Patents

Abstract

The embodiment of the invention discloses a dynamic routing configuration method, device and system, which relate to the field of computers and are used to solve the problem of large workload and inconvenient adjustment of manual routing configuration when using a distributed gateway. The specific solution is as follows: the SDN controller receives the route learning message sent by the dynamic routing agent; the SDN controller updates at least one first routing table entry according to the external routing information; the SDN controller receives the information from the virtual machine sent by the virtual switch of the virtual machine When a data packet is used, the second routing table entry is converted into the first flow table entry; the SDN controller sends the first flow table entry to the virtual switch of the virtual machine to instruct the virtual switch of the virtual machine to pass the virtual machine's virtual switch according to the first flow table entry. Distributed gateways deployed on switches forward packets from virtual machines.

Description

A kind of dynamic routing configuration method, device and system

technical field

The present invention relates to the field of computers, and in particular, to a dynamic routing configuration method, device and system.

Background technique

Software Defined Network (English: Software Defined Network, abbreviation: SDN) is a network that separates the control plane and the data plane of a network device. At present, a technology commonly used in SDN is OpenFlow technology. Using this technology, the SDN controller can control the forwarding of data packets by the virtual switch by controlling the flow table on the virtual switch. As SDN technology continues to mature, more and more operators/cloud service providers take SDN as the preferred solution for managing data centers.

Inside a data center, one or more virtual machines can be deployed on a physical server, and each virtual machine needs to go through a centralized gateway and a border gateway when sending data packets to devices outside the data center. However, with the expansion of the data center, the data traffic between the virtual machines inside the data center and the devices outside the data center increases dramatically, and the data traffic through the centralized gateway is also very large. The load is too heavy and the network performance is affected.

In order to share the load of the centralized gateway, you can consider using a distributed gateway, deploy a distributed gateway on the virtual switch of each virtual machine (that is, the virtual switch to which the virtual machine is connected), and each virtual machine passes through its own virtual switch. The deployed distributed gateway sends packets to devices outside the data center. However, in order for the virtual machine to send data packets to devices outside the data center, routes between the border gateway and the devices outside the data center need to be configured on each distributed gateway. If these routes are manually configured, the workload will be heavy. , and it is inconvenient to manually adjust these routes when the network topology changes.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a dynamic routing configuration method, device, and system, which are used to solve the problem of large workload and inconvenient adjustment of manually configuring routing when using a distributed gateway.

To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

A first aspect of the embodiments of the present invention provides a dynamic routing configuration method, which is applied to a software-defined network SDN, where the SDN is connected to an external network through a border gateway, and the SDN includes: an SDN controller, at least two virtual A distributed gateway is deployed on the virtual switch of the virtual machine, a virtual switch of the virtual machine, and a dynamic routing agent, and the method includes:

The SDN controller receives a route learning message sent by the dynamic routing agent, where the route learning message carries external routing information, and the external routing information is used to represent the routing relationship between the external device and the border gateway;

The SDN controller updates at least one first routing table entry according to the external routing information, and each first routing table entry in the at least one first routing table entry includes the address of the external device and the address to the external device. The address of the border gateway through which the external device sends data packets;

When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the SDN controller converts a second routing table entry into a first flow table entry, and the second routing table entry is the at least one flow table entry. A routing table entry in the first routing table entry, the address of the external device included in the second routing table entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is the at least any one of the two virtual machines;

The SDN controller sends the first flow entry to the virtual switch of the virtual machine to instruct the virtual switch of the virtual machine to pass the distribution deployed on the virtual switch of the virtual machine according to the first flow entry. A gateway forwards the data packets from the virtual machine.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the method further includes:

The SDN controller obtains the internal routing information from at least one third routing table entry, and each third routing table entry in the at least one third routing table entry includes the address of the virtual machine and the address to the virtual machine. The address of the distributed gateway through which the machine sends data packets, the distributed gateway through which the data packet is sent to the virtual machine is the distributed gateway deployed on the virtual switch of the virtual machine, and the internal routing The information is used to represent the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine;

The SDN controller sends a first route advertisement message carrying the internal routing information to the dynamic routing agent, where the first routing advertisement message is used to instruct the dynamic routing agent to publish the internal routing information to the border gateway ;

Wherein, a routing table is stored in the SDN controller, and the routing table includes the at least one first routing table entry and the at least one third routing table entry.

With reference to the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, before the SDN controller acquires internal routing information from at least one third routing table entry, the Methods also include:

The SDN controller acquires routing information of the virtual machine, where the routing information of the virtual machine includes the address of the virtual machine and the address of the distributed gateway deployed on the virtual switch of the virtual machine;

The SDN controller generates the third routing table entry according to the routing information of the virtual machine.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, after the SDN controller generates the third routing table entry according to the routing information of the virtual machine , the method also includes:

The SDN controller converts the third routing entry into a second flow entry, and sends the second flow entry to the virtual switch of the virtual machine.

With reference to the first aspect and the above possible implementation manners, in a fourth possible implementation manner of the first aspect, the dynamic routing agent is deployed on the virtual machine, or the dynamic routing agent is deployed on a server.

With reference to the fourth possible implementation manner of the first aspect, in the fifth possible implementation manner of the first aspect, the SDN further includes a centralized gateway; the routing table further includes a fourth routing table entry; The fourth routing table entry includes the IP address of the network segment to which the Internet Protocol IP of the virtual machine belongs and the IP address of the centralized gateway;

The method also includes:

obtaining, by the SDN controller, centralized routing information from the fourth routing table entry, where the centralized routing information is used to represent a routing relationship between the virtual machine and the centralized gateway;

The SDN controller sends a second route advertisement message carrying the centralized routing information to the dynamic routing agent, where the second routing advertisement message is used to instruct the dynamic routing agent to publish the centralized routing information to the border gateway .

In a second aspect of the embodiments of the present invention, a dynamic routing configuration method is provided, which is applied in a software-defined network SDN, where the SDN is connected to an external network through a border gateway, and the SDN includes: an SDN controller, at least two virtual A distributed gateway is deployed on the virtual switch of the virtual machine, a virtual switch of the virtual machine, and a dynamic routing agent, and the method includes:

The dynamic routing agent receives external routing information sent by the border gateway, where the external routing information is used to represent the routing relationship between the external device and the border gateway;

The dynamic routing agent sends a route learning message carrying the external routing information to the SDN controller, so that the SDN controller updates at least one first routing table entry according to the external routing information, thereby enabling the SDN controller to update at least one first routing table entry. When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the controller converts the second routing table entry into the first flow table entry, and sends the first flow table to the virtual switch of the virtual machine item;

Wherein, each first routing table entry in the at least one first routing table entry contains the address of the external device and the address of the border gateway through which the data packet is sent to the external device; the second routing table entry The routing table entry is one of the at least one first routing table entry, and the address of the external device included in the second routing table entry is the same as the destination address of the data packet from the virtual machine, The virtual machine is any one of the at least two virtual machines.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the method further includes:

The dynamic routing agent receives the first route advertisement message sent by the SDN controller, where the first route advertisement message carries internal routing information, and the internal routing information is used to represent the virtual machine and the virtual machine The routing relationship between the distributed gateways deployed on the virtual switches;

The dynamic routing agent publishes the internal routing information to the border gateway.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the dynamic routing agent receives the external routing information sent by the border gateway, including:

The dynamic routing agent receives the external routing information sent by the border gateway based on the dynamic routing protocol;

The dynamic routing agent publishes the internal routing information to the border gateway, including:

The dynamic routing agent publishes the internal routing information to the border gateway based on the dynamic routing protocol.

With reference to the second aspect and the above possible implementation manners, in a third possible implementation manner of the second aspect, the dynamic routing agent is deployed on the virtual machine, or the dynamic routing agent is deployed on a server.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the SDN further includes a centralized gateway; the method further includes:

The dynamic routing agent receives the second route advertisement message sent by the SDN controller, the second route advertisement message carries centralized routing information, and the centralized routing information is used to represent the virtual machine and the centralized routing information. The routing relationship between gateways;

The dynamic routing agent publishes the centralized routing information to the border gateway.

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the dynamic routing agent publishes the centralized routing information to the border gateway, including:

The dynamic routing agent publishes the centralized routing information to the border gateway based on the dynamic routing protocol.

In a third aspect of the embodiments of the present invention, a software-defined network SDN controller is provided, which is applied in SDN, the SDN is connected to an external network through a border gateway, and the SDN includes: the SDN controller, at least two A virtual machine, a virtual switch of the virtual machine and a dynamic routing agent, a distributed gateway is deployed on the virtual switch of the virtual machine, and the SDN controller includes:

a receiving unit, configured to receive a routing learning message sent by the dynamic routing agent, where the routing learning message carries external routing information, and the external routing information is used to represent the routing relationship between the external device and the border gateway;

An update unit, configured to update at least one first routing table entry according to the external routing information, where each first routing table entry in the at least one first routing table entry contains the address of the external device and the address to the external device. The address of the border gateway through which the external device sends data packets;

a route conversion unit, configured to convert a second routing table entry into a first flow table entry when receiving a data packet from the virtual machine sent by the virtual switch of the virtual machine, where the second routing table entry is the at least one A routing table entry in a first routing table entry, the address of the external device contained in the second routing table entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is the Any one of at least two virtual machines;

a first sending unit, configured to send the first flow entry to the virtual switch of the virtual machine, to instruct the virtual switch of the virtual machine to deploy on the virtual switch of the virtual machine according to the first flow entry The distributed gateway forwards the packets from the virtual machine.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the SDN controller further includes:

The obtaining unit is configured to obtain internal routing information from at least one third routing table entry, where each third routing table entry in the at least one third routing table entry contains the address of the virtual machine and the address to the virtual machine. The address of the distributed gateway through which the machine sends data packets, the distributed gateway through which the data packet is sent to the virtual machine is the distributed gateway deployed on the virtual switch of the virtual machine, and the internal routing The information is used to represent the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine;

a second sending unit, configured to send a first route advertisement message carrying the internal routing information to the dynamic routing agent, where the first route advertisement message is used to instruct the dynamic routing agent to publish the internal routing information to the border gateway routing information;

Wherein, a routing table is stored in the SDN controller, and the routing table includes the at least one first routing table entry and the at least one third routing table entry.

With reference to the first possible implementation manner of the third aspect, in the second possible implementation manner of the third aspect, the acquiring unit is further configured to acquire internal routing information from at least one third routing table entry before acquiring the internal routing information , obtaining routing information of the virtual machine, where the routing information of the virtual machine includes the address of the virtual machine and the address of the distributed gateway deployed on the virtual switch of the virtual machine;

The SDN controller also includes:

A generating unit, configured to generate the third routing table entry according to the routing information of the virtual machine.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the route conversion unit is further configured to generate, in the generation unit according to the routing information of the virtual machine After the third routing table entry, converting the third routing table entry into a second flow table entry;

The first sending unit is further configured to send the second flow entry to the virtual switch of the virtual machine.

With reference to the third aspect and the above possible implementation manners, in a fourth possible implementation manner of the third aspect, the dynamic routing agent is deployed on the virtual machine, or the dynamic routing agent is deployed on a server.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the SDN further includes a centralized gateway; the routing table further includes a fourth routing table entry; The fourth routing table entry includes the IP address of the network segment to which the Internet Protocol IP of the virtual machine belongs and the IP address of the centralized gateway;

The obtaining unit is further configured to obtain centralized routing information from the fourth routing table entry, where the centralized routing information is used to represent the routing relationship between the virtual machine and the centralized gateway;

The second sending unit is configured to send a second route advertisement message carrying the centralized routing information to the dynamic routing agent, where the second route advertisement message is used to instruct the dynamic routing agent to publish the information to the border gateway. The centralized routing information is described.

In a fourth aspect of the embodiments of the present invention, a dynamic routing agent is provided, which is applied in a software-defined network SDN, the SDN is connected to an external network through a border gateway, and the SDN includes: an SDN controller, at least two virtual machines , the virtual switch of the virtual machine and the dynamic routing agent, a distributed gateway is deployed on the virtual switch of the virtual machine, and the dynamic routing agent includes:

a receiving unit, configured to receive external routing information sent by the border gateway, where the external routing information is used to represent the routing relationship between the external device and the border gateway;

A sending unit, configured to send a route learning message carrying the external routing information to the SDN controller, so that the SDN controller updates at least one first routing table entry according to the external routing information, thereby enabling the SDN controller to update at least one first routing table entry. When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the controller converts the second routing table entry into the first flow table entry, and sends the first flow table to the virtual switch of the virtual machine item;

Wherein, each first routing table entry in the at least one first routing table entry contains the address of the external device and the address of the border gateway through which the data packet is sent to the external device; the second routing table entry The routing table entry is one of the at least one first routing table entry, and the address of the external device included in the second routing table entry is the same as the destination address of the data packet from the virtual machine, The virtual machine is any one of the at least two virtual machines.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the receiving unit is further configured to receive a first route advertisement message sent by the SDN controller, where the first route advertisement message carries There is internal routing information, and the internal routing information is used to represent the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine;

The sending unit is further configured to publish the internal routing information to the border gateway.

With reference to the first possible implementation manner of the fourth aspect, in the second possible implementation manner of the fourth aspect, the dynamic routing agent further includes:

a control unit, configured to control the receiving unit to receive the external routing information sent by the border gateway based on the dynamic routing protocol;

The control unit is further configured to control the sending unit to publish the internal routing information to the border gateway based on the dynamic routing protocol.

With reference to the fourth aspect and the above possible implementation manners, in a third possible implementation manner of the fourth aspect, the dynamic routing agent is deployed on the virtual machine, or the dynamic routing agent is deployed on a server.

With reference to the third possible implementation manner of the fourth aspect, in the fourth possible implementation manner of the fourth aspect, the SDN further includes a centralized gateway;

The receiving unit is further configured to receive a second route advertisement message sent by the SDN controller, where the second route advertisement message carries centralized routing information, and the centralized routing information is used to represent the virtual machine and the Describe the routing relationship between centralized gateways;

The sending unit is further configured to publish the centralized routing information to the border gateway.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the control unit is further configured to control the sending unit to send a message to the border gateway based on the dynamic routing protocol Publish the centralized routing information.

A fifth aspect of the embodiments of the present invention provides a dynamic routing configuration system, the system includes: a software-defined network SDN controller, at least two virtual machines, a virtual switch of the virtual machines, and a dynamic routing agent, the virtual A distributed gateway is deployed on the virtual switch of the machine;

The SDN controller is configured to receive a routing learning message sent by the dynamic routing agent, where the routing learning message carries external routing information, and the external routing information is used to represent the routing relationship between the external device and the border gateway ; Update at least one first routing table entry according to the external routing information, and each first routing table entry in the at least one first routing table entry contains the address of the external device and sends data to the external device. The address of the border gateway to pass through when the packet is received; when receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the second routing table entry is converted into a first flow table entry, the second routing table entry is a routing entry in the at least one first routing entry, the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine, the virtual The machine is any one of the at least two virtual machines; the first flow entry is sent to the virtual switch of the virtual machine to instruct the virtual switch of the virtual machine to pass the first flow entry according to the first flow entry. the distributed gateway deployed on the virtual switch of the virtual machine forwards the data packet from the virtual machine;

The dynamic routing agent is configured to receive the external routing information sent by the border gateway; and send the routing learning message carrying the external routing information to the SDN controller, so that the SDN controller can The external routing information updates the at least one first routing table entry, so that when the SDN controller receives the data packet from the virtual machine sent by the virtual switch of the virtual machine, the second routing table is The entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine.

In the dynamic routing configuration method, device, and system provided by the embodiments of the present invention, the SDN controller updates at least one first routing table entry according to the external routing information carried in the received routing learning message; When the data packet from the virtual machine is sent by the virtual switch of any virtual machine included in the virtual machine), the second routing table entry is converted into the first flow table entry, and the first flow table entry is sent to the virtual switch of the virtual machine, to The virtual switch of the virtual machine is caused to forward the data packet from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry. The second routing table entry is one routing table entry in at least one first routing table entry, and the address of the external device included in the second routing table entry is the same as the destination address of the data packet from the virtual machine. In this way, when the virtual machine needs to send a data packet to an external device, the virtual switch of the virtual machine can forward the data packet through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manual The route between the border gateway and the external device is configured on the distributed gateway, so that the problem of heavy workload of manually configuring the route when the distributed gateway is adopted in the prior art can be solved; in addition, when the network topology changes, the present invention is adopted to implement In the dynamic routing configuration method in the example, the SDN controller can dynamically update the first routing table entry according to the external routing information carried in the routing learning message, so that the routing between the border gateway and the external device can be dynamically adjusted to solve the problem in the prior art. Inconvenient adjustment when using distributed gateways.

Description of drawings

FIG. 1 is a schematic diagram of the composition of an SDN in an embodiment of the present invention;

2 is a flowchart of a dynamic routing configuration method in an embodiment of the present invention;

3 is a flowchart of another dynamic routing configuration method in an embodiment of the present invention;

4 is a flowchart of another dynamic routing configuration method in an embodiment of the present invention;

5 is a flowchart of another dynamic routing configuration method in an embodiment of the present invention;

6 is a flowchart of another dynamic routing configuration method in an embodiment of the present invention;

7 is a schematic diagram of the composition of an SDN controller in an embodiment of the present invention;

FIG. 8 is a schematic diagram of the composition of another SDN controller in an embodiment of the present invention;

FIG. 9 is a schematic diagram of the composition of another SDN controller in an embodiment of the present invention;

10 is a schematic diagram of the composition of a dynamic routing proxy in an embodiment of the present invention;

11 is a schematic diagram of the composition of another dynamic routing proxy in an embodiment of the present invention;

12 is a schematic diagram of the composition of another SDN controller in an embodiment of the present invention;

13 is a schematic diagram of the composition of another dynamic routing proxy in an embodiment of the present invention;

14 is a schematic diagram of the composition of another dynamic routing proxy in an embodiment of the present invention;

FIG. 15 is a schematic diagram of the composition of a dynamic routing configuration system in an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The embodiment of the present invention is applied to an SDN. The SDN is connected to an external network through a border gateway. As shown in FIG. 1 , the SDN includes an SDN controller, at least two virtual machines, and a virtual switch of the virtual machine (that is, a virtual switch accessed by the virtual machine). ) and dynamic routing proxies. Wherein, multiple virtual machines can be connected to the same virtual switch, but each virtual machine is only connected to one virtual switch, that is, the virtual switch of each virtual machine is unique. Virtual machines and virtual switches of virtual machines are deployed on servers, and multiple virtual machines can be deployed on one server. Data packets sent by virtual machines can be forwarded to external devices through distributed gateways and border gateways. Control plane interaction is performed between the dynamic routing agent and the border gateway in the embodiment of the present invention through a dynamic routing protocol. Commonly used dynamic routing protocols include: Border Gateway Protocol (English: Border Gateway Protocol, abbreviation: BGP) and Open Shortest Path First (English: Open Shortest Path First, abbreviation: OSPF) protocol, etc. The description of the specific dynamic routing protocol can refer to Relevant descriptions in the prior art are not repeated in this embodiment of the present invention.

An embodiment of the present invention provides a dynamic routing configuration method, as shown in FIG. 2 , including:

S101. The SDN controller receives the route learning message sent by the dynamic routing agent.

The route learning message carries external routing information, and the external routing information is used to represent the routing relationship between the external device and the border gateway. The SDN controller can receive the route learning message after the initial configuration of the network is completed, and can also receive the route learning message when the routing relationship between the external device and the border gateway changes. The external routing information can be used to represent the routing relationship between one external device and the border gateway, and the external routing information can also be used to represent the routing relationship between multiple external devices and the border gateway.

It should be noted that the dynamic routing agent in the embodiment of the present invention may be deployed on a virtual machine or a server, and a network card that can be used for communicating with the border gateway is configured in the dynamic routing agent. The dynamic routing agent can be a functional module or a physical entity. When the dynamic routing agent is deployed on a server, the server where the dynamic routing agent is located can be called a dynamic routing agent.

S102. The SDN controller updates at least one first routing table entry according to the external routing information.

The SDN controller stores a routing table, and in the embodiment of the present invention, each item in the routing table is referred to as a routing table entry. The routing table includes at least one first routing table entry, and each first routing table entry includes an address of an external device and an address of a border gateway through which data packets are sent to the external device.

The address of the external device may be an Internet Protocol (English: Internet Protocol, abbreviation: IP) address of the external device, or may be a Media Access Control (Media Access Control, abbreviation: MAC) address of the external device, to which the embodiment of the present invention is directed Not limited.

The address of the border gateway may be the IP address of the border gateway, or may be the MAC address of the border gateway, which is not limited in this embodiment of the present invention.

It should be noted that each first routing table entry may also include a subnet mask, priority, etc. The format of the first routing table entry may refer to the format of the routing table in the prior art. The format of the item is not limited.

S103. When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the SDN controller converts the second routing table entry into the first flow table entry.

The second routing table entry is a routing table entry in at least one first routing table entry, and the address of the external device contained in the second routing table entry is the same as the destination address of the data packet from the virtual machine. In this step The virtual machine is any one of at least two virtual machines.

The first flow entry is used to indicate a forwarding rule when the virtual switch of the virtual machine forwards the data packet. This embodiment of the present invention does not limit the format of the first flow entry. For the format of the first flow entry, reference may be made to the related description of the flow entry in the prior art.

S104. The SDN controller sends a first flow entry to the virtual switch of the virtual machine to instruct the virtual switch of the virtual machine to forward the data packet from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry .

Exemplarily, it is assumed that virtual machine 1 (virtual machine 1 is any virtual machine included in the SDN) wants to send a data packet to external device 1, and the IP address of external device 1 is 10.10.10.5, then virtual machine 1 first sends the data packet. The packet is sent to virtual switch 1 (that is, the virtual switch of virtual machine 1); virtual switch 1 searches whether virtual switch 1 stores a flow table entry with a destination address of 10.10.10.5; if virtual switch 1 stores a destination address of 10.10. 10.5 flow entry, virtual switch 1 forwards the data packet through the distributed gateway deployed on virtual switch 1 according to the flow entry; if virtual switch 1 does not store a flow entry with destination address 10.10.10.5, Then the virtual switch 1 sends the data packet to the SDN controller, and the SDN controller converts the second routing table entry corresponding to the destination address into a first flow table entry and sends it to the virtual switch 1, and the virtual switch 1 then according to the first flow table. item, the packet is forwarded through the distributed gateway deployed on virtual switch 1.

In the dynamic routing configuration method provided by the embodiment of the present invention, the SDN controller updates at least one first routing table entry according to the external routing information carried in the received routing learning message; When a data packet from the virtual machine is sent by the virtual switch of a virtual machine), the second routing table entry is converted into the first flow table entry, and the first flow table entry is sent to the virtual switch of the virtual machine, so that the virtual machine The virtual switch forwards the data packet from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry. The second routing table entry is one routing table entry in at least one first routing table entry, and the address of the external device included in the second routing table entry is the same as the destination address of the data packet from the virtual machine. In this way, when the virtual machine needs to send a data packet to an external device, the virtual switch of the virtual machine can forward the data packet through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manual The route between the border gateway and the external device is configured on the distributed gateway, so that the problem of heavy workload of manually configuring the route when the distributed gateway is adopted in the prior art can be solved; in addition, when the network topology changes, the present invention is adopted to implement In the dynamic routing configuration method in the example, the SDN controller can dynamically update the first routing table entry according to the external routing information carried in the routing learning message, so that the routing between the border gateway and the external device can be dynamically adjusted to solve the problem in the prior art. Inconvenient adjustment when using distributed gateways.

Further, as shown in FIG. 3 , the dynamic routing configuration method provided by the embodiment of the present invention may further include:

S105. The SDN controller acquires internal routing information from at least one third routing table entry.

The routing table stored in the SDN controller includes at least one first routing table entry and at least one third routing table entry. Each third routing table entry in the at least one third routing table entry contains the address of the virtual machine and the address of the distributed gateway to pass through when sending data packets to the virtual machine, and the distribution to pass through when sending data packets to the virtual machine. The virtual gateway is a distributed gateway deployed on the virtual switch of the virtual machine, and the internal routing information is used to represent the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine.

It should be noted that a large-scale data center usually supports multiple tenants (tenants are users who use data center resources, for example, an enterprise can be one tenant), and multiple tenants share data center resources. The SDN controller in the embodiment of the present invention may also support a scenario of multiple tenants. Specifically, the SDN controller may store multiple routing tables, and each routing table corresponds to one tenant. The SDN controller can manage each routing table independently. Correspondingly, multiple dynamic routing proxy instances may also be deployed on the dynamic routing proxy, each dynamic routing proxy instance corresponds to a tenant, and each dynamic routing proxy instance may implement the function of the dynamic routing proxy in the embodiment of the present invention. The SDN controller can manage the life cycle of all dynamic routing proxy instances deployed on the dynamic routing proxy.

S106: The SDN controller sends a first route advertisement message carrying internal routing information to the dynamic routing agent, where the first route advertisement message is used to instruct the dynamic routing agent to publish the internal routing information to the border gateway.

In this way, the border gateway can obtain the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine, and the border gateway can update the routing table entries stored on the border gateway according to the internal routing information. When an external device wants to send a data packet to the virtual machine, the external device first sends the data packet to the border gateway, and the border gateway can forward the data packet to the virtual switch of the virtual machine according to the routing table entry stored on the border gateway The distributed gateway is deployed, and the distributed gateway deployed on the virtual switch of the virtual machine sends the packet to the virtual machine.

It should be noted that, in this embodiment of the present invention, S105-S106 may be executed before S101-S104, and S105-S106 may also be executed after S101-S104.

Further, before the SDN controller obtains the internal routing information from the at least one third routing table entry, the SDN controller may obtain the routing information of one virtual machine in the at least two virtual machines, and then generate the routing information according to the routing information of the virtual machine. A third routing table entry. The routing information of the virtual machine includes the address of the virtual machine and the address of the distributed gateway deployed on the virtual switch of the virtual machine.

Further, after the SDN controller generates the third routing table entry according to the routing information of the virtual machine, the SDN controller can convert the third routing table entry into the second flow table entry, and send the third routing table entry to the virtual switch of the virtual machine. A second flow entry, where the second flow entry may be used to indicate a forwarding rule when the virtual switch of the virtual machine forwards the data packet to the virtual machine.

Optionally, the SDN may further include a centralized gateway; the routing table stored in the SDN controller may further include a fourth routing table entry; the fourth routing table entry includes the IP of the network segment to which the Internet Protocol IP of the virtual machine belongs. address and IP address of the centralized gateway.

The dynamic routing configuration method provided by the embodiment of the present invention may further include: the SDN controller obtains centralized routing information from the fourth routing table entry, where the centralized routing information is used to represent the routing relationship between the virtual machine and the centralized gateway; the SDN controller A second route announcement message carrying centralized routing information is sent to the dynamic routing agent, where the second route announcement message is used to instruct the dynamic routing agent to release the centralized routing information to the border gateway.

It should be noted that the third routing table entry in the embodiment of the present invention is different from the fourth routing table entry, the third routing table entry is the host route, and the fourth routing table entry is the network segment route. The SDN controller can control the dynamic routing agent to publish host routes to the border gateway, and can also control the dynamic routing agent to publish network segment routes to the border gateway. A distributed gateway switch can be set in the SDN controller. When the distributed gateway switch is turned on, the dynamic routing agent advertises the host route to the border gateway. Gateway, for example, when sending data packets to virtual machine 1 with IP address 192.168.100.5, it needs to go through the distributed gateway deployed on the virtual switch of virtual machine 1, and when sending data packets to virtual machine 2 with IP address 192.168.100.125, it needs to Through the distributed gateway deployed on the virtual switch of virtual machine 2; when the distributed gateway switch is turned off, the dynamic routing agent advertises the network segment route to the border gateway, and the network segment route can be used to indicate to the virtual machine whose IP address belongs to the same network segment. When sending data packets from the virtual machine, the centralized gateway is required. In a multi-tenant scenario, different tenants can use different gateways, for example, one tenant uses a distributed gateway and another tenant uses a centralized gateway.

An embodiment of the present invention provides a dynamic routing configuration method, as shown in FIG. 4 , including:

S201. The dynamic routing agent receives external routing information sent by the border gateway, where the external routing information is used to represent the routing relationship between the external device and the border gateway.

The dynamic routing agent can receive external routing information after the initial network configuration is completed, and can also receive external routing information when the routing relationship between the external device and the border gateway changes.

The dynamic routing agent in the embodiment of the present invention may be deployed on a virtual machine, or may be deployed on a server.

S202. The dynamic routing agent sends a route learning message carrying external routing information to the SDN controller, so that the SDN controller updates at least one first routing table entry according to the external routing information, so that the SDN controller receives the virtual switch of the virtual machine When sending the data packet from the virtual machine, the second routing table entry is converted into the first flow table entry, and the first flow table entry is sent to the virtual switch of the virtual machine.

Wherein, each first routing table entry in the at least one first routing table entry contains the address of an external device and the address of the border gateway to be passed when sending data packets to the external device; the second routing table entry is at least one A routing table entry in the first routing table entry, the address of the external device contained in the second routing table entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is any one of at least two virtual machines. .

Further, the dynamic routing agent may include: a "main" dynamic routing agent and a "standby" dynamic routing agent. The "primary" dynamic routing proxy and the "standby" dynamic routing proxy are two dynamic routing proxies with identical functions. Typically, the "main" dynamic routing proxy runs. A "heartbeat" mechanism can be established between the SDN controller and the "main" dynamic routing agent, that is, the "main" dynamic routing agent can periodically send a custom structure (also called "heartbeat packet" or "heartbeat packet") to the SDN controller. Heartbeat frame”), if the SDN controller can receive the “heartbeat packet” normally, the SDN controller can determine that the “main” dynamic routing agent is running normally; if the SDN controller cannot receive the “heartbeat packet” normally, the SDN controller It can be determined that the "primary" dynamic routing agent fails or is down. At this time, the SDN controller controls the operation of the "standby" dynamic routing agent to ensure reliability. For the specific content of the "heartbeat" mechanism and the specific format of the "heartbeat packet", reference may be made to relevant descriptions in the prior art, and details are not described here in this embodiment of the present invention.

In the dynamic routing configuration method provided by the embodiment of the present invention, the dynamic routing agent sends a routing learning message carrying external routing information to the SDN controller, so that the SDN controller updates at least one first routing table entry according to the external routing information, thereby enabling the SDN controller to update at least one first routing table entry. When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the router converts the second routing table entry into the first flow table entry, and sends the first flow table entry to the virtual switch of the virtual machine. In this way, the virtual switch of the virtual machine can forward the data packets from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually configuring the border gateway and the external device on the distributed gateway. Therefore, when the distributed gateway is used in the prior art, the problem of large workload of manual routing configuration can be solved; in addition, when the network topology changes, using the dynamic routing configuration method in the embodiment of the present invention, the dynamic routing agent can Obtain the routing relationship between the external device and the border gateway after the network topology changes through the external routing information, and instruct the SDN controller to dynamically update the first routing table entry by sending a route learning message to the SDN controller, so that the border gateway and the border gateway can be dynamically adjusted. Routing between external devices to solve the problem of inconvenient adjustment when using distributed gateways in the prior art.

Further, as shown in FIG. 5 , the dynamic routing configuration method provided by the embodiment of the present invention may further include:

S203. The dynamic routing agent receives the first route advertisement message sent by the SDN controller.

The first route advertisement message carries internal routing information, and the internal routing information is used to represent the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine.

S204, the dynamic routing agent advertises the internal routing information to the border gateway.

In this way, the border gateway can obtain the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine, and the border gateway can update the routing table entries stored on the border gateway according to the internal routing information. When an external device wants to send a data packet to the virtual machine, the external device first sends the data packet to the border gateway, and the border gateway can forward the data packet to the virtual switch of the virtual machine according to the routing table entry stored on the border gateway The distributed gateway is deployed, and the distributed gateway deployed on the virtual switch of the virtual machine sends the packet to the virtual machine.

It should be noted that, in this embodiment of the present invention, S203-S204 may be executed before S201-S202, and S203-S204 may also be executed after S201-S202.

Further, the dynamic routing agent can receive the external routing information sent by the border gateway based on the dynamic routing protocol; the dynamic routing agent can also publish the internal routing information to the border gateway based on the dynamic routing protocol. The dynamic routing protocol may be BGP or OSPF.

Optionally, the SDN may further include a centralized gateway; the dynamic routing configuration method provided by the embodiment of the present invention may further include: the dynamic routing agent receives the second route advertisement message sent by the SDN controller, and the second route advertisement message carries the Centralized routing information. The centralized routing information is used to represent the routing relationship between the virtual machine and the centralized gateway; the dynamic routing agent publishes the centralized routing information to the border gateway.

Further, the dynamic routing agent can also publish centralized routing information to the border gateway based on the dynamic routing protocol.

An embodiment of the present invention also provides a dynamic routing configuration method, as shown in FIG. 6 , including:

S301. The dynamic routing agent receives the external routing information sent by the border gateway.

The external routing information is used to represent the routing relationship between the external device and the border gateway. The dynamic routing agent can receive external routing information after the initial configuration of the network is completed, and can also receive external routing information when the routing relationship between the external device and the border gateway changes.

The dynamic routing agent in the embodiment of the present invention may be deployed on a virtual machine, or may be deployed on a server.

S302. The dynamic routing agent sends a route learning message carrying external routing information to the SDN controller.

S303. The SDN controller updates at least one first routing table entry according to the external routing information.

Wherein, each first routing table entry in the at least one first routing table entry includes an address of an external device and an address of a border gateway through which a data packet is sent to the external device.

S304 , the virtual machine 1 sends the data packet 1 to the virtual switch 1 , and the destination address of the data packet 1 is the address of the external device 1 .

The virtual machine 1 is any virtual machine included in the SDN, and the virtual switch 1 is a virtual switch of the virtual machine 1 .

S305, the virtual switch 1 sends the data packet 1 to the SDN controller.

S306. The SDN controller converts the second routing table entry into the first flow table entry.

Wherein, the second routing table entry is one routing table entry in the at least one first routing table entry, and the address of the external device 1 contained in the second routing table entry.

S307: The SDN controller sends the first flow entry to the virtual switch 1 to instruct the virtual switch 1 to forward the data packet 1 through the distributed gateway deployed on the virtual switch 1 according to the first flow entry.

S308. The SDN controller acquires internal routing information from at least one third routing table entry.

The SDN controller stores a routing table, and the routing table includes at least one first routing table entry and at least one third routing table entry. Each third routing table entry in the at least one third routing table entry contains the address of the virtual machine and the address of the distributed gateway to be passed when sending data packets to the virtual machine, and the address of the distributed gateway to be passed when sending data packets to the virtual machine. The distributed gateway is a distributed gateway deployed on the virtual switch of the virtual machine, and the internal routing information is used to represent the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine.

S309. The SDN controller sends a first route advertisement message carrying internal routing information to the dynamic routing agent.

S310. The dynamic routing agent advertises the internal routing information to the border gateway.

In this way, the border gateway can obtain the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine, and the border gateway can update the routing table entries stored on the border gateway according to the internal routing information. When an external device wants to send a data packet to the virtual machine, the external device first sends the data packet to the border gateway, and the border gateway can forward the data packet to the virtual switch of the virtual machine according to the routing table entry stored on the border gateway The distributed gateway is deployed, and the distributed gateway deployed on the virtual switch of the virtual machine sends the packet to the virtual machine.

In the dynamic routing configuration method provided by the embodiment of the present invention, the SDN controller updates at least one first routing table entry according to the external routing information carried in the received routing learning message; When the data packet 1 sent by the virtual switch (virtual switch 1) of any virtual machine), the second routing table entry is converted into the first flow table entry, and the first flow table entry is sent to the virtual switch 1, so that the virtual switch 1 The first flow table entry forwards the data packet 1 through the distributed gateway deployed on the virtual switch 1 . The second routing table entry is one routing table entry in the at least one first routing table entry, and the address of the external device included in the second routing table entry is the same as the destination address of the data packet 1 . In this way, when the virtual machine 1 needs to send the data packet 1 to the external device, the virtual switch 1 can forward the data packet 1 through the distributed gateway deployed on the virtual switch 1 according to the first flow entry, without manually The route between the border gateway and the external device is configured on the top of the router, so that the problem of a large workload of manually configuring the route when the distributed gateway is adopted in the prior art can be solved; in addition, when the network topology changes, the dynamic In the routing configuration method, the SDN controller can dynamically update the first routing table entry according to the external routing information carried in the routing learning message, so that the routing between the border gateway and the external device can be dynamically adjusted, so as to solve the problem of using distributed gateways in the prior art. Time adjustment is not convenient.

An embodiment of the present invention further provides an SDN controller, which is applied to an SDN. The SDN is connected to an external network through a border gateway, and the SDN includes: an SDN controller, at least two virtual machines, a virtual switch of the virtual machines, and a dynamic routing agent, A distributed gateway is deployed on the virtual switch of the virtual machine. As shown in FIG. 7 , the SDN controller includes: a receiving unit 41 , an updating unit 42 , a routing conversion unit 43 and a first sending unit 44 .

The receiving unit 41 is configured to receive a routing learning message sent by the dynamic routing agent, where the routing learning message carries external routing information, and the external routing information is used to represent the routing relationship between the external device and the border gateway.

The updating unit 42 is configured to update at least one first routing table entry according to the external routing information, and each first routing table entry in the at least one first routing table entry contains an address of an external device and sends a data packet to the external device The address of the border gateway to pass through.

The routing conversion unit 43 is configured to convert the second routing table entry into a first flow table entry when receiving a data packet from the virtual machine sent by the virtual switch of the virtual machine, and the second routing table entry is at least one first routing table entry The address of the external device contained in the second routing table entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is any one of the at least two virtual machines.

The first sending unit 44 is configured to send the first flow entry to the virtual switch of the virtual machine to instruct the virtual switch of the virtual machine to forward the data from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry. data pack.

Further, as shown in FIG. 8 , the SDN controller provided by the embodiment of the present invention further includes: an obtaining unit 45 and a second sending unit 46 .

The obtaining unit 45 is configured to obtain internal routing information from at least one third routing table entry, and each third routing table entry in the at least one third routing table entry includes the address of the virtual machine and the time when the data packet is sent to the virtual machine. The address of the distributed gateway to pass through. The distributed gateway to pass through when sending data packets to the virtual machine is the distributed gateway deployed on the virtual switch of the virtual machine. The internal routing information is used to represent the virtual machine and the virtual switch of the virtual machine. Routing relationships between deployed distributed gateways.

The second sending unit 46 is configured to send a first route advertisement message carrying internal routing information to the dynamic routing agent, where the first routing advertisement message is used to instruct the dynamic routing agent to publish the internal routing information to the border gateway.

The SDN controller stores a routing table, and the routing table includes at least one first routing table entry and at least one third routing table entry.

Further, the obtaining unit 45 is further configured to obtain the routing information of the virtual machine before obtaining the internal routing information from at least one third routing table entry, and the routing information of the virtual machine includes the address of the virtual machine and the virtual switch of the virtual machine. The address of the deployed distributed gateway.

As shown in FIG. 9 , the SDN controller further includes: a generating unit 47 .

The generating unit 47 is configured to generate a third routing table entry according to the routing information of the virtual machine.

Further, the route converting unit 43 is further configured to convert the third routing entry into the second flow entry after the generating unit 47 generates the third routing entry according to the routing information of the virtual machine.

The first sending unit 44 is further configured to send the second flow entry to the virtual switch of the virtual machine.

Further, the dynamic routing agent can be deployed on the virtual machine, and the dynamic routing agent can also be deployed on the server.

Optionally, the SDN further includes a centralized gateway; the routing table further includes a fourth routing table entry; the fourth routing table entry includes the IP address of the network segment to which the Internet Protocol IP of the virtual machine belongs and the IP address of the centralized gateway.

The obtaining unit 45 is further configured to obtain centralized routing information from the fourth routing table entry, where the centralized routing information is used to represent the routing relationship between the virtual machine and the centralized gateway.

The second sending unit 46 is configured to send a second route advertisement message carrying the centralized routing information to the dynamic routing agent, where the second route advertisement message is used to instruct the dynamic routing agent to publish the centralized routing information to the border gateway.

It should be noted that, for the specific description of some functional modules in the SDN controller provided in the embodiment of the present invention, reference may be made to the corresponding content in the method embodiment, which will not be described in detail here in this embodiment.

In the SDN controller provided by the embodiment of the present invention, the SDN controller updates at least one first routing table entry according to the external routing information carried in the received routing learning message; When the data packet from the virtual machine is sent by the virtual switch of the virtual machine), the second routing table entry is converted into the first flow table entry, and the first flow table entry is sent to the virtual switch of the virtual machine, so that the virtual switch of the virtual machine is based on the first flow table entry. The first flow table entry forwards the data packet from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine. The second routing table entry is one of the at least one first routing table entry, and the address of the external device included in the second routing table entry is the same as the destination address of the data packet from the virtual machine. In this way, when the virtual machine needs to send a data packet to an external device, the virtual switch of the virtual machine can forward the data packet through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually The route between the border gateway and the external device is configured on the gateway, so that the problem of large workload of manually configuring the route when the distributed gateway is adopted in the prior art can be solved; The SDN controller can dynamically update the first routing table entry according to the external routing information carried in the routing learning message, so that the routing between the border gateway and the external device can be dynamically adjusted, so as to solve the problem of using distributed gateways in the prior art. Time adjustment is not convenient.

An embodiment of the present invention further provides a dynamic routing agent, which is applied to an SDN. The SDN is connected to an external network through a border gateway, and the SDN includes: an SDN controller, at least two virtual machines, a virtual switch of the virtual machines, and a dynamic routing agent, A distributed gateway is deployed on the virtual switch of the virtual machine. As shown in FIG. 10 , the dynamic routing agent includes: a receiving unit 51 and a sending unit 52 .

The receiving unit 51 is configured to receive external routing information sent by the border gateway, where the external routing information is used to represent the routing relationship between the external device and the border gateway.

The sending unit 52 is configured to send a route learning message carrying external routing information to the SDN controller, so that the SDN controller updates at least one first routing table entry according to the external routing information, so that the SDN controller receives the virtual machine's virtual When the switch sends the data packet from the virtual machine, it converts the second routing table entry into the first flow table entry, and sends the first flow table entry to the virtual switch of the virtual machine.

Wherein, each first routing table entry in the at least one first routing table entry contains the address of an external device and the address of the border gateway to be passed when sending data packets to the external device; the second routing table entry is at least one A routing table entry in the first routing table entry, the address of the external device contained in the second routing table entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is any one of at least two virtual machines. .

Further, the receiving unit 51 is further configured to receive the first route advertisement message sent by the SDN controller, where the first route advertisement message carries internal routing information, and the internal routing information is used to represent the virtual machine and the deployment on the virtual switch of the virtual machine. The routing relationship between the distributed gateways.

The sending unit 52 is further configured to publish internal routing information to the border gateway.

Further, as shown in FIG. 11 , the dynamic routing agent further includes: a control unit 53 .

The control unit 53 is configured to control the receiving unit 51 to receive the external routing information sent by the border gateway based on the dynamic routing protocol.

The control unit 53 is further configured to control the sending unit 52 to publish internal routing information to the border gateway based on the dynamic routing protocol.

Further, the dynamic routing agent can be deployed on the virtual machine, and the dynamic routing agent can also be deployed on the server.

Optionally, a centralized gateway is also included in the SDN.

The receiving unit 51 is further configured to receive a second route advertisement message sent by the SDN controller, where the second route advertisement message carries centralized routing information, and the centralized routing information is used to represent the routing relationship between the virtual machine and the centralized gateway;

The sending unit 52 is further configured to publish the centralized routing information to the border gateway.

Further, the control unit 53 is further configured to control the sending unit 52 to publish the centralized routing information to the border gateway based on the dynamic routing protocol.

It should be noted that, for the specific description of some functional modules in the dynamic routing proxy provided in the embodiment of the present invention, reference may be made to the corresponding content in the method embodiment, which will not be described in detail in this embodiment.

In the dynamic routing agent provided by the embodiment of the present invention, the dynamic routing agent sends a routing learning message carrying external routing information to the SDN controller, so that the SDN controller updates at least one first routing table entry according to the external routing information, thereby enabling the SDN controller to update at least one first routing table entry. When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the second routing table entry is converted into the first flow table entry, and the first flow table entry is sent to the virtual switch of the virtual machine. In this way, the virtual switch of the virtual machine can forward the data packets from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually configuring the border gateway and the external device on the distributed gateway. Therefore, when the distributed gateway is used in the prior art, the problem of large workload of manual routing configuration can be solved; in addition, when the network topology changes, the dynamic routing agent in the embodiment of the present invention is used, and the dynamic routing agent can pass The external routing information obtains the routing relationship between the external device and the border gateway after the network topology has changed, and instructs the SDN controller to dynamically update the first routing table entry by sending a route learning message to the SDN controller, so that the border gateway and the external gateway can be dynamically adjusted. The routing between devices can solve the problem of inconvenient adjustment when using distributed gateways in the prior art.

An embodiment of the present invention further provides an SDN controller, which is applied to an SDN. The SDN is connected to an external network through a border gateway, and the SDN includes: an SDN controller, at least two virtual machines, a virtual switch of the virtual machines, and a dynamic routing agent, A distributed gateway is deployed on the virtual switch of the virtual machine. As shown in FIG. 12 , the SDN controller includes: a receiver 61 , a processor 62 and a transmitter 63 .

The receiver 61 is configured to receive a routing learning message sent by the dynamic routing agent, where the routing learning message carries external routing information, and the external routing information is used to represent the routing relationship between the external device and the border gateway.

The processor 62 is configured to update at least one first routing table entry according to the external routing information, and each first routing table entry in the at least one first routing table entry contains an address of an external device and sends a data packet to the external device The address of the border gateway to pass through; when receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the second routing table entry is converted into the first flow table entry, and the second routing table entry is at least one first flow table entry. One routing table entry in the routing table entry, the address of the external device included in the second routing table entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is any one of the at least two virtual machines.

The transmitter 63 is configured to send the first flow entry to the virtual switch of the virtual machine to instruct the virtual switch of the virtual machine to forward the data packet from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry .

Further, the processor 62 is further configured to obtain internal routing information from at least one third routing table entry, and each third routing table entry in the at least one third routing table entry contains the address of the virtual machine and the address to the virtual machine. The address of the distributed gateway to pass through when sending data packets. The distributed gateway to pass through when sending data packets to the virtual machine is the distributed gateway deployed on the virtual switch of the virtual machine. The internal routing information is used to characterize the virtual machine and the virtual machine. The routing relationship between the distributed gateways deployed on the virtual switches.

The transmitter 63 is further configured to send a first route advertisement message carrying internal routing information to the dynamic routing agent, where the first route advertisement message is used to instruct the dynamic routing agent to publish the internal routing information to the border gateway.

The SDN controller stores a routing table, and the routing table includes at least one first routing table entry and at least one third routing table entry.

Further, the processor 62 is further configured to obtain the routing information of the virtual machine before obtaining the internal routing information from at least one third routing table entry, and the routing information of the virtual machine includes the address of the virtual machine and the virtual switch of the virtual machine. The address of the deployed distributed gateway; the SDN controller generates a third routing table entry according to the routing information of the virtual machine.

Further, the processor 62 is further configured to convert the third routing entry into the second flow entry after generating the third routing entry according to the routing information of the virtual machine.

The transmitter 63 is further configured to send the second flow entry to the virtual switch of the virtual machine.

Further, the dynamic routing agent can be deployed on the virtual machine, and the dynamic routing agent can also be deployed on the server.

Optionally, the SDN further includes a centralized gateway; the routing table further includes a fourth routing table entry; the fourth routing table entry includes the IP address of the network segment to which the Internet Protocol IP of the virtual machine belongs and the IP address of the centralized gateway.

The processor 62 is further configured to obtain centralized routing information from the fourth routing table entry, where the centralized routing information is used to represent the routing relationship between the virtual machine and the centralized gateway.

The transmitter 63 is further configured to send a second route advertisement message carrying the centralized routing information to the dynamic routing agent, where the second route advertisement message is used to instruct the dynamic routing agent to publish the centralized routing information to the border gateway.

It should be noted that, for the specific description of some functional modules in the SDN controller provided in the embodiment of the present invention, reference may be made to the corresponding content in the method embodiment, which will not be described in detail here in this embodiment.

In the SDN controller provided by the embodiment of the present invention, the SDN controller updates at least one first routing table entry according to the external routing information carried in the received routing learning message; When the data packet from the virtual machine is sent by the virtual switch of the virtual machine), the second routing table entry is converted into the first flow table entry, and the first flow table entry is sent to the virtual switch of the virtual machine, so that the virtual switch of the virtual machine is based on the first flow table entry. The first flow table entry forwards the data packet from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine. The second routing table entry is one of the at least one first routing table entry, and the address of the external device included in the second routing table entry is the same as the destination address of the data packet from the virtual machine. In this way, when the virtual machine needs to send a data packet to an external device, the virtual switch of the virtual machine can forward the data packet through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually The route between the border gateway and the external device is configured on the gateway, so that the problem of large workload of manually configuring the route when the distributed gateway is adopted in the prior art can be solved; The SDN controller can dynamically update the first routing table entry according to the external routing information carried in the routing learning message, so that the routing between the border gateway and the external device can be dynamically adjusted, so as to solve the problem of using distributed gateways in the prior art. Time adjustment is not convenient.

An embodiment of the present invention further provides a dynamic routing agent, which is applied to an SDN. The SDN is connected to an external network through a border gateway, and the SDN includes: an SDN controller, at least two virtual machines, a virtual switch of the virtual machines, and a dynamic routing agent, A distributed gateway is deployed on the virtual switch of the virtual machine. As shown in FIG. 13 , the dynamic routing agent includes: a receiver 71 and a transmitter 72 .

The receiver 71 is configured to receive external routing information sent by the border gateway, where the external routing information is used to represent the routing relationship between the external device and the border gateway.

The transmitter 72 is configured to send a route learning message carrying external routing information to the SDN controller, so that the SDN controller updates at least one first routing table entry according to the external routing information, so that the SDN controller receives the virtual machine's virtual When the switch sends the data packet from the virtual machine, it converts the second routing table entry into the first flow table entry, and sends the first flow table entry to the virtual switch of the virtual machine.

Wherein, each first routing table entry in the at least one first routing table entry contains the address of an external device and the address of the border gateway to be passed when sending data packets to the external device; the second routing table entry is at least one A routing table entry in the first routing table entry, the address of the external device contained in the second routing table entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is any one of at least two virtual machines. .

Further, the receiver 71 is further configured to receive the first route advertisement message sent by the SDN controller. The first route advertisement message carries internal routing information, and the internal routing information is used to represent the virtual machine and the virtual machine deployed on the virtual switch. The routing relationship between the distributed gateways.

The transmitter 72 is further configured to publish internal routing information to the border gateway.

Further, as shown in FIG. 14 , the dynamic routing agent further includes: a processor 73 .

The processor 73 is configured to control the receiver 71 to receive the external routing information sent by the border gateway based on the dynamic routing protocol; control the transmitter 72 to publish the internal routing information to the border gateway based on the dynamic routing protocol.

Further, the dynamic routing agent can be deployed on the virtual machine, and the dynamic routing agent can also be deployed on the server.

Optionally, a centralized gateway is also included in the SDN.

The receiver 71 is further configured to receive a second route advertisement message sent by the SDN controller, where the second route advertisement message carries centralized routing information, and the centralized routing information is used to represent the routing relationship between the virtual machine and the centralized gateway.

The transmitter 72 is also used for publishing centralized routing information to the border gateway.

Further, the processor 73 is further configured to control the transmitter 72 to publish the centralized routing information to the border gateway based on the dynamic routing protocol.

It should be noted that, for the specific description of some functional modules in the dynamic routing proxy provided in the embodiment of the present invention, reference may be made to the corresponding content in the method embodiment, which will not be described in detail in this embodiment.

In the dynamic routing agent provided by the embodiment of the present invention, the dynamic routing agent sends a routing learning message carrying external routing information to the SDN controller, so that the SDN controller updates at least one first routing table entry according to the external routing information, thereby enabling the SDN controller to update at least one first routing table entry. When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the second routing table entry is converted into the first flow table entry, and the first flow table entry is sent to the virtual switch of the virtual machine. In this way, the virtual switch of the virtual machine can forward the data packets from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually configuring the border gateway and the external device on the distributed gateway. Therefore, when the distributed gateway is used in the prior art, the problem of large workload of manual routing configuration can be solved; in addition, when the network topology changes, the dynamic routing agent in the embodiment of the present invention is used, and the dynamic routing agent can pass The external routing information obtains the routing relationship between the external device and the border gateway after the network topology has changed, and instructs the SDN controller to dynamically update the first routing table entry by sending a route learning message to the SDN controller, so that the border gateway and the external gateway can be dynamically adjusted. The routing between devices can solve the problem of inconvenient adjustment when using distributed gateways in the prior art.

An embodiment of the present invention further provides a dynamic routing configuration system. As shown in FIG. 15 , the dynamic routing configuration system includes: an SDN controller 81, at least two virtual machines 82, a virtual switch 83 of the virtual machines 82, and a dynamic routing agent 84, A distributed gateway is deployed on the virtual switch 83 .

The SDN controller 81 is used to receive a route learning message sent by the dynamic routing agent 84, the route learning message carries external routing information, and the external routing information is used to represent the routing relationship between the external device and the border gateway; update according to the external routing information At least one first routing table entry, and each first routing table entry in the at least one first routing table entry contains the address of the external device and the address of the border gateway to be passed when sending data packets to the external device; When the switch 83 sends the data packet from the virtual machine 82, it converts the second routing table entry into the first flow table entry, the second routing table entry is one routing table entry in the at least one first routing table entry, and the second routing table entry is The address of the external device contained in the item is the same as the destination address of the data packet from the virtual machine 82, and the virtual machine 82 is any one of the at least two virtual machines; the first flow entry is sent to the virtual switch 83 to indicate The virtual switch 83 forwards the data packet from the virtual machine 82 through the distributed gateway deployed on the virtual switch 83 according to the first flow entry.

The dynamic routing agent 84 is configured to receive the external routing information sent by the border gateway; send a routing learning message carrying the external routing information to the SDN controller 81, so that the SDN controller 81 updates at least one first routing table entry according to the external routing information, Furthermore, the SDN controller 81 converts the second routing table entry into the first flow table entry when receiving the data packet from the virtual machine 82 sent by the virtual switch 83 , and sends the first flow table entry to the virtual switch 83 .

In the dynamic routing configuration system provided by the embodiment of the present invention, the SDN controller updates at least one first routing table entry according to the external routing information carried in the received routing learning message; When a data packet from the virtual machine is sent by the virtual switch of a virtual machine, the second routing table entry is converted into the first flow table entry, and the first flow table entry is sent to the virtual switch of the virtual machine, so that the virtual switch of the virtual machine According to the first flow entry, the data packet from the virtual machine is forwarded through the distributed gateway deployed on the virtual switch of the virtual machine. The second routing table entry is one of the at least one first routing table entry, and the address of the external device included in the second routing table entry is the same as the destination address of the data packet from the virtual machine. In this way, when the virtual machine needs to send a data packet to an external device, the virtual switch of the virtual machine can forward the data packet through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually The route between the border gateway and the external device is configured on the gateway, so that the problem of large workload of manually configuring the route when the distributed gateway is adopted in the prior art can be solved; In the dynamic routing configuration system, the SDN controller can dynamically update the first routing table entry according to the external routing information carried in the routing learning message, so that the routing between the border gateway and the external device can be dynamically adjusted, so as to solve the problem of using distributed routing in the prior art. The problem of inconvenient adjustment during gateway.

From the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions can be allocated as required. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above. For the specific working process of the system, apparatus and unit described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , which includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, abbreviation: ROM), random access memory (English: Random Access Memory, abbreviation: RAM), magnetic disk or optical disk, etc. A medium that can store program code.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (27)

1. A dynamic routing configuration method, applied in a software-defined network SDN, the SDN is connected to an external network through a border gateway, wherein the SDN comprises: an SDN controller, at least two virtual machines, the A virtual switch and a dynamic routing agent of a virtual machine, where a distributed gateway is deployed on the virtual switch of the virtual machine, and the method includes: The SDN controller receives a route learning message sent by the dynamic routing agent, where the route learning message carries external routing information, and the external routing information is used to represent the routing relationship between the external device and the border gateway; The SDN controller updates at least one first routing table entry according to the external routing information, and each first routing table entry in the at least one first routing table entry includes the address of the external device and the address to the external device. The address of the border gateway through which the external device sends data packets; When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the SDN controller converts a second routing table entry into a first flow table entry, and the second routing table entry is the at least one flow table entry. A routing table entry in the first routing table entry, the address of the external device included in the second routing table entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is the at least Any one of the two virtual machines; The SDN controller sends the first flow entry to the virtual switch of the virtual machine to instruct the virtual switch of the virtual machine to pass the distribution deployed on the virtual switch of the virtual machine according to the first flow entry. A gateway forwards the data packets from the virtual machine. 2. The method according to claim 1, wherein the method further comprises: The SDN controller obtains the internal routing information from at least one third routing table entry, and each third routing table entry in the at least one third routing table entry includes the address of the virtual machine and the address to the virtual machine. The address of the distributed gateway through which the machine sends data packets, the distributed gateway through which the data packet is sent to the virtual machine is the distributed gateway deployed on the virtual switch of the virtual machine, and the internal routing The information is used to represent the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine; The SDN controller sends a first route advertisement message carrying the internal routing information to the dynamic routing agent, where the first routing advertisement message is used to instruct the dynamic routing agent to publish the internal routing information to the border gateway ; Wherein, a routing table is stored in the SDN controller, and the routing table includes the at least one first routing table entry and the at least one third routing table entry. 3. The method according to claim 2, wherein before the SDN controller acquires internal routing information from at least one third routing table entry, the method further comprises: The SDN controller acquires routing information of the virtual machine, where the routing information of the virtual machine includes the address of the virtual machine and the address of the distributed gateway deployed on the virtual switch of the virtual machine; The SDN controller generates the third routing table entry according to the routing information of the virtual machine. 4. The method according to claim 3, wherein after the SDN controller generates the third routing table entry according to the routing information of the virtual machine, the method further comprises: The SDN controller converts the third routing entry into a second flow entry, and sends the second flow entry to the virtual switch of the virtual machine. The method according to any one of claims 2-4, wherein the dynamic routing agent is deployed on the virtual machine, or the dynamic routing agent is deployed on a server to which the virtual machine belongs superior. The method according to claim 5, wherein the SDN further includes a centralized gateway; the routing table further includes a fourth routing table entry; the fourth routing table entry includes the virtual machine The IP address of the network segment to which the Internet Protocol IP belongs and the IP address of the centralized gateway; The method also includes: obtaining, by the SDN controller, centralized routing information from the fourth routing table entry, where the centralized routing information is used to represent a routing relationship between the virtual machine and the centralized gateway; The SDN controller sends a second route advertisement message carrying the centralized routing information to the dynamic routing agent, where the second routing advertisement message is used to instruct the dynamic routing agent to publish the centralized routing information to the border gateway . 7. A dynamic routing configuration method, applied in a software-defined network SDN, wherein the SDN is connected to an external network through a border gateway, wherein the SDN includes: an SDN controller, at least two virtual machines, the A virtual switch and a dynamic routing agent of a virtual machine, where a distributed gateway is deployed on the virtual switch of the virtual machine, and the method includes: The dynamic routing agent receives external routing information sent by the border gateway, where the external routing information is used to represent the routing relationship between the external device and the border gateway; The dynamic routing agent sends a route learning message carrying the external routing information to the SDN controller, so that the SDN controller updates at least one first routing table entry according to the external routing information, thereby enabling the SDN controller to update at least one first routing table entry. When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the controller converts the second routing table entry into the first flow table entry, and sends the first flow table to the virtual switch of the virtual machine item; Wherein, each first routing table entry in the at least one first routing table entry contains the address of the external device and the address of the border gateway through which the data packet is sent to the external device; the second routing table entry The routing table entry is one of the at least one first routing table entry, and the address of the external device included in the second routing table entry is the same as the destination address of the data packet from the virtual machine, The virtual machine is any one of the at least two virtual machines. 8. The method according to claim 7, wherein the method further comprises: The dynamic routing agent receives the first route advertisement message sent by the SDN controller, where the first route advertisement message carries internal routing information, and the internal routing information is used to represent the virtual machine and the virtual machine The routing relationship between the distributed gateways deployed on the virtual switches; The dynamic routing agent publishes the internal routing information to the border gateway. 9. The method according to claim 8, wherein the dynamic routing agent receives the external routing information sent by the border gateway, comprising: The dynamic routing agent receives the external routing information sent by the border gateway based on the dynamic routing protocol; The dynamic routing agent publishes the internal routing information to the border gateway, including: The dynamic routing agent publishes the internal routing information to the border gateway based on the dynamic routing protocol. The method according to claim 7 or 8, wherein the dynamic routing agent is deployed on the virtual machine, or the dynamic routing agent is deployed on a server to which the virtual machine belongs. The method according to claim 9, wherein the dynamic routing agent is deployed on the virtual machine, or the dynamic routing agent is deployed on a server to which the virtual machine belongs. 12. The method according to claim 10, wherein the SDN further comprises a centralized gateway; the method further comprises: The dynamic routing agent receives the second route advertisement message sent by the SDN controller, the second route advertisement message carries centralized routing information, and the centralized routing information is used to represent the virtual machine and the centralized routing information. The routing relationship between gateways; The dynamic routing agent publishes the centralized routing information to the border gateway. 13. The method according to claim 11, wherein the SDN further comprises a centralized gateway; the method further comprises: The dynamic routing agent receives the second route advertisement message sent by the SDN controller, the second route advertisement message carries centralized routing information, and the centralized routing information is used to represent the virtual machine and the centralized routing information. The routing relationship between gateways; The dynamic routing agent publishes the centralized routing information to the border gateway. 14. The method according to claim 13, wherein the dynamic routing agent publishes the centralized routing information to the border gateway, comprising: The dynamic routing agent publishes the centralized routing information to the border gateway based on the dynamic routing protocol. 15. A software-defined network SDN controller, applied in an SDN, the SDN is connected to an external network through a border gateway, wherein the SDN includes: the SDN controller, at least two virtual machines, all the The virtual switch and dynamic routing agent of the virtual machine, the distributed gateway is deployed on the virtual switch of the virtual machine, and the SDN controller includes: a receiving unit, configured to receive a routing learning message sent by the dynamic routing agent, where the routing learning message carries external routing information, and the external routing information is used to represent the routing relationship between the external device and the border gateway; An update unit, configured to update at least one first routing table entry according to the external routing information, where each first routing table entry in the at least one first routing table entry contains the address of the external device and the address to the external device. The address of the border gateway through which the external device sends data packets; a route conversion unit, configured to convert a second routing table entry into a first flow table entry when receiving a data packet from the virtual machine sent by the virtual switch of the virtual machine, where the second routing table entry is the at least one A routing table entry in a first routing table entry, the address of the external device contained in the second routing table entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is the Any one of at least two virtual machines; a first sending unit, configured to send the first flow entry to the virtual switch of the virtual machine, to instruct the virtual switch of the virtual machine to deploy on the virtual switch of the virtual machine according to the first flow entry The distributed gateway forwards the packets from the virtual machine. 16. The SDN controller according to claim 15, wherein the SDN controller further comprises: The obtaining unit is configured to obtain internal routing information from at least one third routing table entry, where each third routing table entry in the at least one third routing table entry contains the address of the virtual machine and the address to the virtual machine. The address of the distributed gateway through which the machine sends data packets, the distributed gateway through which the data packet is sent to the virtual machine is the distributed gateway deployed on the virtual switch of the virtual machine, and the internal routing The information is used to represent the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine; a second sending unit, configured to send a first route advertisement message carrying the internal routing information to the dynamic routing agent, where the first route advertisement message is used to instruct the dynamic routing agent to publish the internal routing information to the border gateway routing information; Wherein, a routing table is stored in the SDN controller, and the routing table includes the at least one first routing table entry and the at least one third routing table entry. 17. The SDN controller according to claim 16, wherein the obtaining unit is further configured to obtain the routing information of the virtual machine before obtaining the internal routing information from at least one third routing table entry, The routing information of the virtual machine includes the address of the virtual machine and the address of the distributed gateway deployed on the virtual switch of the virtual machine; The SDN controller also includes: A generating unit, configured to generate the third routing table entry according to the routing information of the virtual machine. 18. The SDN controller according to claim 17, wherein the route conversion unit is further configured to, after the generating unit generates the third routing table entry according to the routing information of the virtual machine, convert the The third routing table entry is converted into a second flow table entry; The first sending unit is further configured to send the second flow entry to the virtual switch of the virtual machine. 19. The SDN controller according to any one of claims 16-18, wherein the dynamic routing agent is deployed on the virtual machine, or the dynamic routing agent is deployed on the virtual machine to which the virtual machine belongs on the server. 20. The SDN controller according to claim 19, wherein the SDN further includes a centralized gateway; the routing table further includes a fourth routing table entry; the fourth routing table entry includes the The IP address of the network segment to which the Internet Protocol IP of the virtual machine belongs and the IP address of the centralized gateway; The obtaining unit is further configured to obtain centralized routing information from the fourth routing table entry, where the centralized routing information is used to represent the routing relationship between the virtual machine and the centralized gateway; The second sending unit is configured to send a second route advertisement message carrying the centralized routing information to the dynamic routing agent, where the second route advertisement message is used to instruct the dynamic routing agent to publish the information to the border gateway. The centralized routing information is described. 21. A dynamic routing agent, applied in a software-defined network SDN, wherein the SDN is connected to an external network through a border gateway, wherein the SDN comprises: an SDN controller, at least two virtual machines, the virtual The virtual switch of the virtual machine and the dynamic routing agent, a distributed gateway is deployed on the virtual switch of the virtual machine, and the dynamic routing agent includes: a receiving unit, configured to receive external routing information sent by the border gateway, where the external routing information is used to represent the routing relationship between the external device and the border gateway; A sending unit, configured to send a route learning message carrying the external routing information to the SDN controller, so that the SDN controller updates at least one first routing table entry according to the external routing information, thereby enabling the SDN controller to update at least one first routing table entry. When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the controller converts the second routing table entry into the first flow table entry, and sends the first flow table to the virtual switch of the virtual machine item; Wherein, each first routing table entry in the at least one first routing table entry contains the address of the external device and the address of the border gateway through which the data packet is sent to the external device; the second routing table entry The routing table entry is one of the at least one first routing table entry, and the address of the external device included in the second routing table entry is the same as the destination address of the data packet from the virtual machine, The virtual machine is any one of the at least two virtual machines. 22. The dynamic routing agent according to claim 21, wherein the receiving unit is further configured to receive a first routing advertisement message sent by the SDN controller, wherein the first routing advertisement message carries an internal routing information, where the internal routing information is used to represent the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine; The sending unit is further configured to publish the internal routing information to the border gateway. 23. The dynamic routing proxy according to claim 22, wherein the dynamic routing proxy further comprises: a control unit, configured to control the receiving unit to receive the external routing information sent by the border gateway based on the dynamic routing protocol; The control unit is further configured to control the sending unit to publish the internal routing information to the border gateway based on the dynamic routing protocol. 24. The dynamic routing proxy according to claim 23, wherein the dynamic routing proxy is deployed on the virtual machine, or the dynamic routing proxy is deployed on a server to which the virtual machine belongs. 25. The dynamic routing agent according to claim 24, wherein the SDN further comprises a centralized gateway; The receiving unit is further configured to receive a second route advertisement message sent by the SDN controller, where the second route advertisement message carries centralized routing information, and the centralized routing information is used to represent the virtual machine and the Describe the routing relationship between centralized gateways; The sending unit is further configured to publish the centralized routing information to the border gateway. 26. The dynamic routing agent according to claim 25, wherein the control unit is further configured to control the sending unit to publish the centralized routing information to the border gateway based on the dynamic routing protocol. 27. A dynamic routing configuration system, characterized in that the system comprises: a software-defined network SDN controller, at least two virtual machines, a virtual switch of the virtual machine, and a dynamic routing agent, the virtual switch of the virtual machine A distributed gateway is deployed on the platform; The SDN controller is configured to receive a route learning message sent by the dynamic routing agent, where the route learning message carries external routing information, and the external routing information is used to represent the routing relationship between the external device and the border gateway Update at least one first routing table entry according to the external routing information, and each first routing table entry in the at least one first routing table entry contains the address of the external device and sends data to the external device. The address of the border gateway to pass through when the packet is received; when receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the second routing table entry is converted into the first flow table entry, the second routing table entry is a routing entry in the at least one first routing entry, the address of the external device contained in the second routing entry is the same as the destination address of the data packet from the virtual machine, the virtual The machine is any one of the at least two virtual machines; the first flow entry is sent to the virtual switch of the virtual machine to instruct the virtual switch of the virtual machine to pass the first flow entry according to the first flow entry. the distributed gateway deployed on the virtual switch of the virtual machine forwards the data packet from the virtual machine; The dynamic routing agent is configured to receive the external routing information sent by the border gateway; and send the routing learning message carrying the external routing information to the SDN controller, so that the SDN controller can The external routing information updates the at least one first routing table entry, so that when the SDN controller receives the data packet from the virtual machine sent by the virtual switch of the virtual machine, the second routing table is The entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine.