CN101299718A - Port switching method, network equipment and network system - Google Patents

Abstract

The present invention discloses a port switching method, network equipment and network system, wherein, the port switching method includes: routing equipment confirming that the first physical member port is not available; selecting a second physical member port; transmitting TRUNK sub-interface information mapped from the first physical member port to the second physical member port, wherein, the TRUNK sub-interface information includes virtual MAC address and user ID allocated for the TRUNK sub-interface; and transmitting packets carrying the virtual MAC address to a switch accessing to the second physical member port. Application of the technical program of the invention can ensure continuity and reliability of communication through the switch between the physical member ports.

Description

Port switching method, network device and network system

technical field

The invention relates to the technical field of communications, in particular to a port switching method, network equipment and a network system.

Background technique

In the broadband access network, it is required that the link failure between the BAS (Broadband Access Server, Broadband Access Server) device and the switch is not perceived by the user, that is, to realize the hot switching of the user when the link or the port of the BAS device fails.

The existing technology provides a VRRP (Virtual Router Redundancy Protocol, virtual backup router) technology, referring to Figure 1, it is necessary to configure a virtual router number and a virtual router IP address on router A and router B, and generate a virtual MAC address at the same time. A virtual router is added to the network. That is, a virtual router consists of a main router and several backup routers (such as router A and router B in the figure, it can be assumed that router A is the main router and router B is the backup router). The main router actually implements the forwarding function. When the main router fails , the backup router will become the new master router, taking over the work of the original master router. When the host communicates with the virtual router, the virtual MAC and virtual IP are carried in the message transmitted. The host accesses the network through the virtual router without knowing any information about the physical router actually connected to the host, which can ensure that the next hop of the host When the router (main router in the virtual router) fails, it can be replaced by another router (backup router) in time, so as to maintain the continuity and reliability of communication.

During the research and practice of the prior art, the inventor found the following problems in the prior art:

The router in the prior art needs to be configured with an IP address, which is a three-layer network based on IP forwarding, and when a certain physical member port of the router fails, the user who accesses the physical member port cannot be transferred to other physical member ports, that is, it cannot To switch between ports.

Contents of the invention

Embodiments of the present invention provide a port switching method, network equipment and network system, which can realize switching between physical member ports of the routing equipment.

In view of this, embodiments of the present invention provide:

A port switching method, comprising:

When it is confirmed that the first physical member port is unavailable, select the second physical member port;

Sending the port aggregation TRUNK sub-interface information mapped to the first physical member port to the second physical member port; the TRUNK sub-interface information includes: a virtual MAC address and a user ID allocated for the TRUNK sub-interface;

sending the packet carrying the virtual MAC address to the switch connected to the second physical member port.

A network device comprising:

A confirmation unit, configured to confirm that the first physical member port is unavailable;

A selection unit, configured to select a second physical member port after confirming that the first physical member port is unavailable;

The first sending unit is configured to send the TRUNK sub-interface information mapped to the first physical member port to the second physical member port; the TRUNK sub-interface information includes: the virtual MAC address allocated for the TRUNK sub-interface and the user logo;

A second sending unit, configured to send a message carrying the virtual MAC address to a switch connected to the second physical member port.

A network system, including: routing equipment and switches,

The routing device is configured to confirm that the first physical member port is unavailable, select a second physical member port, and send the virtual MAC address corresponding to the first physical member port to the second physical member port; the first physical member The virtual MAC address corresponding to the port is: the virtual MAC address allocated for the TRUNK sub-interface mapped to the first physical member port; sending a message carrying the virtual MAC address to the switch connected to the second physical member port ;

The switch is configured to receive the message carrying the virtual MAC address.

In this embodiment of the present invention, when the first physical member port is unavailable, the TRUNK sub-interface information mapped to the first physical member port is sent to the second physical member port, and is included in the message sent to the switch connected to the second physical member port. Carry the virtual MAC address to realize switching between physical member ports of the routing device.

Description of drawings

FIG. 1 is a network architecture diagram provided by the prior art using a virtual router for access;

FIG. 2 is a networking diagram provided by Embodiment 1 of the present invention;

FIG. 3 is a flowchart of a method for mapping a virtual MAC address to a physical member port provided by Embodiment 1 of the present invention;

FIG. 4 is a flowchart of a port switching method provided by Embodiment 1 of the present invention;

FIG. 5 is a flowchart of a method for confirming that a member port is unavailable according to Embodiment 1 of the present invention;

FIG. 6 is a structural diagram of a network device provided by Embodiment 2 of the present invention.

Detailed ways

An embodiment of the present invention provides a port switching method, including: the routing device confirms that the first physical member port is unavailable; selects the second physical member port; and sends the port aggregation TRUNK sub-interface information mapped to the first physical member port to the second physical member port Two physical member ports; the TRUNK sub-interface information includes: a virtual MAC address and a user identifier allocated for the TRUNK sub-interface; sending a message carrying the virtual MAC address to a switch connected to the second physical member port. By using the technical solution provided by the embodiment of the present invention, the continuity and reliability of communication can be guaranteed by switching between physical member ports.

The interface of BAS (Broadband Access Server, broadband access server) equipment is briefly introduced as follows: BAS equipment is connected to the convergence switch through an asymmetrical Ethernet Trunk, as shown in Figure 2, there are 4 physical interfaces under one Ethernet Trunk interface of BAS equipment Member interfaces: GE1/0/1, GE2/0/1, GE3/0/1, GE4/0/1, where the first two physical member interfaces (GE1/0/1 and GE2/0/1) are connected to a The last two physical member interfaces (GE3/0/1 and GE4/0/1) are connected to another switch.

In order to make the port switching method provided by the embodiment of the present invention clearer, the process of mapping a virtual MAC address to a physical member port in units of Ethernet trunk sub-interfaces is introduced in detail, as shown in FIG. 3 . The process specifically includes :

Step 301, the BAS device creates an Ethernet TRUNK sub-interface, and assigns a virtual MAC address and a user ID to the Ethernet TRUNK sub-interface. Wherein, the user identification can be: VLAN (Virtual Local Area Network, virtual local area network) or QinQ (also called Stacked VLAN, two-layer virtual local area network) identification, and the routing device in this embodiment can be BAS.

Step 302, utilizing the assigned user identification for the Ethernet TRUNK sub-interface, according to the principle of balancing the user identification of each physical member port, the TRUNK sub-interface information is mapped to the physical member port of the BAS, and the TRUNK sub-interface information includes: assigned virtual MAC address and user ID.

Step 303 , each physical member port receives a message broadcast by a user, and the message broadcast by the user includes VLAN/QinQ information of the user, wherein the message broadcast by the user is a first-type message.

Step 304, judge whether the user identification in the first type message is the user identification in the TRUNK sub-interface information mapped by the physical member port receiving the first type message, if yes, execute step 305; if no, end this process .

Step 305, assuming that the VLAN/QinQ information in the first type of message is the VLAN/QinQ in the TRUNK sub-interface information mapped by the first physical member port, the BAS device sends a response message to the switch through the first physical member port, and the response message The text includes: the virtual MAC address in the trunk sub-interface information.

Step 306, the switch saves the corresponding relationship between the virtual MAC address and the switch port connected to the first physical member port, and sends a response message to the user, the response message carrying the virtual MAC address in the TRUNK sub-interface information.

Subsequent users send the second type of message to the BAS with the virtual MAC address as the destination address, so that after the switch receives the second type of message from the user, it The corresponding relationship between the switch port connected to the member port), and the second type of message of the user is sent to the BAS device through the switch port, so that all the second type of messages with the virtual MAC address as the destination address are received by the first physical member port .

Referring to Fig. 4 below, the port switching method provided by Embodiment 1 of the present invention is introduced in detail, and the method specifically includes:

Step 401. Confirm that the first physical member port is unavailable.

The specific implementation of this step is shown in FIG. 5 .

Step 402: Select a second physical member port according to the user ID in the TRUNK sub-interface information mapped to the first physical member port and according to the principle of balancing user IDs of each physical member port.

Step 403: Send the TRUNK sub-interface information mapped to the first physical member port to the second physical member port, wherein the TRUNK sub-interface information includes: the virtual MAC address and user ID allocated by the BAS device for the TRUNK sub-interface.

Step 404, sending a user detection message to the switch through the second physical member port, where the user detection message carries the virtual MAC address.

Step 405, the switch refreshes the MAC table, that is, the switch deletes the previously saved correspondence between the virtual MAC address and the switch port connected to the first physical member port, and saves the correspondence between the virtual MAC address and the switch port connected to the second physical member port.

Wherein, the above-mentioned first physical member port and the second physical member port may be divided into different service boards. Therefore, the port switching method described above can realize user hot switching across boards on the routing device.

Referring to Figure 5, the method flow for confirming that the first physical member port is unavailable specifically includes:

Step 501, after the switch receives the second type message from the user, according to the corresponding relationship between the virtual MAC address in the second type message and the switch port, the first physical member of the BAS is sent to the first physical member of the BAS through the switch port corresponding to the virtual MAC address The port (connected to the switch port corresponding to the virtual MAC address) sends the second type of message, but does not receive a response message from the BAS within a specific time period, confirming that the first physical member port is unavailable, and the virtual MAC address is aged. Wherein, the second type of message includes: user identification VLAN/QinQ, virtual MAC address, single board and port number to which the message is accessed.

Step 502, the switch broadcasts the second type of message through each port.

Step 503, after the BAS receives the second type of message, judge whether the type sign in the TRUNK port attribute table that receives the second type of message represents an asymmetrical trunk, if yes, perform step 504; if not, follow the common member The port receives the message process to process.

Step 504, BAS judge whether the user identification in the second type message is identical with the user identification in the TRUNK sub-interface information mapped by the physical member port receiving the second type message, if yes, execute step 505, if not, Execute step 507.

Step 505, BAS judges whether the virtual MAC address in the second type message is the same as the virtual MAC address in the TRUNK sub-interface information mapped by the physical member port receiving the second type message, if yes, execute step 506, if If not, go to step 507.

Step 506, BAS judges whether the single board and port number carried in the second type of message are the same as the single board and port number of the physical member port receiving the second type of message, if yes, end this process, if not, execute Step 507.

Step 507, the BAS discards the second type of message.

Step 508, the BAS utilizes the packet sampling detection technology, and when the discarded second-type packets within a unit time period reach the threshold, it confirms that the first physical member port is unavailable according to the virtual MAC address in the discarded second-type packets. use.

Those of ordinary skill in the art can understand that all or part of the steps in the methods of the above embodiments can be implemented through a program to instruct related hardware, and the program can be stored in a computer-readable storage medium, such as a read-only memory, Disk or CD, etc.

Referring to FIG. 6, Embodiment 2 of the present invention provides a network device, which includes: a first physical member port, a second physical member port, a confirmation unit 601, a selection unit 602, a first sending unit 603, and a second sending unit 604 ,in,

A confirming unit 601, configured to confirm that the first physical member port is unavailable;

A selection unit 602, configured to select a second physical member port after confirming that the first physical member port is unavailable;

The first sending unit 603 is configured to send the TRUNK sub-interface information mapped to the first physical member port to the second physical member port; the TRUNK sub-interface information includes: the virtual MAC address allocated for the TRUNK sub-interface and User ID;

The second sending unit 604 is configured to send the packet carrying the virtual MAC address to a switch connected to the second physical member port through the second physical member port.

The device also includes:

An allocation unit 605, configured to allocate a virtual MAC address and a user ID for the TRUNK sub-interface;

A mapping unit 606, configured to map the TRUNK sub-interface information to a physical member port, where the TRUNK sub-interface information includes: a virtual MAC address and a user identifier allocated for the TRUNK sub-interface;

A first-type message receiving unit 607, configured to receive a first-type message carrying a user identifier;

A judging unit 608, configured to judge whether the user identifier in the first type of message is the user identifier in the TRUNK sub-interface information mapped to the physical member port receiving the first type of message;

A response message sending unit 609, configured to send a response message to the user when the determination result of the determination unit is yes, the response message carrying the virtual MAC address in the TRUNK sub-interface information.

Wherein, the confirmation unit 601 includes:

A second-type message receiving unit, configured to receive a second-type message carrying a virtual MAC address and a user identifier;

A discarding message confirmation unit, configured to be used when the user ID in the second type of message is different from the user ID in the TRUNK sub-interface information mapped to the physical member port receiving the second type of message, or the second type of message When the virtual MAC address in the text is different from the virtual MAC address in the trunk sub-interface information mapped to the physical member port receiving the second type of message, it is confirmed to discard the second type of message;

a threshold judging unit, configured to judge whether the second type of packets discarded within a unit time period reach the threshold;

A port unavailable confirming unit, configured to confirm that the The physical member port, that is, the first physical member port is unavailable.

Wherein, the selection unit 602 is configured to select the second physical member port according to the user ID in the TRUNK sub-interface information mapped to the first physical member port and according to the principle of balancing user IDs of each physical member port.

Embodiment 3 of the present invention provides a network system, including: a routing device and a switch,

The routing device assigns a virtual MAC address and user ID to the TRUNK sub-interface, and maps the information of the TRUNK sub-interface to the physical member port according to the principle of balancing the user ID of each physical member port; receives the first type of message, and confirms that the first type of message The user ID is the user ID in the TRUNK sub-interface information mapped to the physical member port receiving the first type of message, and sends a response message to the switch, and the response message carries the TRUNK sub-interface information Virtual MAC address;

The switch saves the corresponding relationship between the virtual MAC address in the response message and the switch port connected to the physical member port, and sends the response message to the user;

The switch receives the second type of message sent by the user, and sends the second type of message to the routing device through the switch port corresponding to the virtual MAC address according to the correspondence between the virtual MAC address in the second type of message and the switch port. When no response message from the routing device is received, confirm that the virtual MAC address is aging, and send the second type of message to the routing device through each port of the switch.

The routing device receives the second type of message carrying the virtual MAC address and the user ID from the switch, and when the user ID in the second type of message is mapped to the TRUNK sub-interface information of the physical member port receiving the second type of message If the user ID in the second type of message is different, or the virtual MAC address in the second type of message is different from the virtual MAC address in the trunk sub-interface information mapped to the physical member port receiving the second type of message, confirm to discard the second type of message. text; determine whether the second type of message discarded within the unit time period reaches the threshold; if yes, confirm the corresponding relationship between the virtual MAC address and the physical member port in the second type of message discarded The physical member port, that is, the first physical member port is unavailable; the virtual MAC address corresponding to the first physical member port is sent to the second physical member port; MAC address message;

The switch records the correspondence between the virtual MAC address and the switch port connected to the second physical member port.

As can be seen from the above analysis, the embodiments of the present invention have the following beneficial effects:

In this embodiment of the present invention, when the first physical member port is unavailable, the TRUNK sub-interface information mapped to the first physical member port is sent to the second physical member port, and is included in the message sent to the switch connected to the second physical member port. Carry the virtual MAC address to realize switching between the physical member ports of the routing device. The switch connected to the second physical member port saves the corresponding relationship between the virtual MAC address and the switch port connected to the second physical member port. When carrying the uplink message of the virtual MAC address, the user's uplink message can be sent to the routing device through the switch port corresponding to the virtual MAC address according to the above correspondence, and the routing device receives the uplink message through the second physical member port. The uplink message is switched between the physical member ports of the routing device to ensure the continuity and reliability of the communication.

According to the user ID in the TRUNK sub-interface information, the embodiment of the present invention maps the TRUNK sub-interface information to the physical member port according to the principle of user ID balance of each physical member port, wherein the TRUNK sub-interface information includes: the TRUNK sub-interface Assigned virtual MAC address and user ID. Map different virtual MACs to corresponding physical member ports, and send response packets carrying the virtual MAC addresses to users, so as to realize load sharing of users on different physical member ports.

The port switching method, network equipment and network system provided by the embodiment of the present invention have been introduced in detail above. For those skilled in the art, according to the idea of the embodiment of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as limiting the present invention.

Claims (15)

1. A port switching method, characterized in that, comprising: When it is confirmed that the first physical member port is unavailable, select the second physical member port; Sending the port aggregation TRUNK sub-interface information mapped to the first physical member port to the second physical member port; the TRUNK sub-interface information includes: a virtual MAC address and a user ID allocated for the TRUNK sub-interface; sending the packet carrying the virtual MAC address to the switch connected to the second physical member port. 2. The method according to claim 1, characterized in that, before confirming that the first physical member port is unavailable, the method further comprises: Allocate a virtual MAC address and user ID for the trunk sub-interface, and map the trunk sub-interface information to each physical member port. 3. The method according to claim 2, wherein the mapping of the TRUNK sub-interface information to each physical member port is specifically: According to the user ID in the trunk sub-interface information, map the trunk sub-interface information to the physical member port according to the principle of balancing the user ID of each physical member port. 4. The method according to claim 2, wherein the confirming that the first physical member port is unavailable specifically includes: When the user ID in the received second type message is different from the user ID in the TRUNK sub-interface information mapped to the physical member port receiving the second type message, or the virtual MAC address in the second type message When the virtual MAC address in the TRUNK sub-interface information mapped to the physical member port receiving the second type of message is different, the routing device confirms to discard the second type of message; When the discarded second-type packets within a unit time period reach the threshold, according to the virtual MAC address in the discarded second-type packets, confirm that the physical member port corresponding to the virtual MAC address is the first physical member port. Member ports are not available. 5. The method according to claim 4, characterized in that, after mapping the TRUNK sub-interface information to each physical member port and before confirming that the first physical member port is unavailable, the method further comprises: Receive the first type of message, confirm that the user ID in the first type of message is the user ID in the TRUNK sub-interface information mapped to the physical member port receiving the first type of message, and send a response to the user through the switch message, the response message carrying the virtual MAC address in the TRUNK sub-interface information; Receive a second type of message from the user, where the second type of message includes: a user identifier and the virtual MAC address. 6. The method of claim 5, wherein: The sending of the response message to the user through the switch is specifically: Send the response message to the switch connected to the physical member port, the switch saves the corresponding relationship between the virtual MAC address in the response message and the switch port connected to the physical member port, and sends the response message to the user Send the response message. 7. The method according to claim 6, characterized in that before receiving the second type of message from the user, the method further comprises: The switch receives the second type message sent by the user, and sends it to the routing device through the switch port corresponding to the virtual MAC address according to the pre-stored correspondence between the virtual MAC address in the second type message and the switch port. the second type of message; When the switch does not receive a response message from the routing device, it confirms that the virtual MAC address is aging, and sends the second type message to the routing device through each port of the switch. 8. The method of claim 1, wherein: The selection of the second physical member port is specifically: Select the second physical member port according to the user ID in the TRUNK sub-interface information mapped to the first physical member port and according to the principle of balancing user IDs of the physical member ports. 9. The method according to claim 1, characterized in that, after sending the message carrying the virtual MAC address to the switch connected to the second physical member port, the method further comprises: The switch records the correspondence between the virtual MAC address and the switch port connected to the second physical member port. 10. A network device, characterized by comprising: A confirmation unit, configured to confirm that the first physical member port is unavailable; A selection unit, configured to select a second physical member port after confirming that the first physical member port is unavailable; The first sending unit is configured to send the TRUNK sub-interface information mapped to the first physical member port to the second physical member port; the TRUNK sub-interface information includes: the virtual MAC address allocated for the TRUNK sub-interface and the user logo; A second sending unit, configured to send a message carrying the virtual MAC address to a switch connected to the second physical member port. 11. The device of claim 10, further comprising: An allocation unit, configured to allocate a virtual MAC address and a user ID for the TRUNK sub-interface; The mapping unit is used to map the TRUNK sub-interface information to a physical member port. 12. The apparatus of claim 11, wherein: The confirmation unit includes: the second type message receiving unit, configured to receive the second type message; A discarding message confirmation unit, used for when the user ID in the second type of message is different from the user ID in the TRUNK sub-interface information mapped to the physical member port receiving the second type of message, or the second type of message When the virtual MAC address in the text is different from the virtual MAC address in the TRUNK sub-interface information mapped by the physical member port receiving the second type of message, confirm to discard the second type of message; a threshold judging unit, configured to judge whether the second type of packets discarded within a unit time period reach the threshold; A port unavailable confirmation unit, configured to confirm the physical member port corresponding to the virtual MAC address according to the virtual MAC address in the discarded second-type message when the judgment result of the threshold judging unit is Yes That is, the first physical member port is unavailable. 13. The device of claim 12, further comprising: a first-type message receiving unit, configured to receive a first-type message; A judging unit, configured to judge whether the user ID in the first type of message is the user ID in the TRUNK sub-interface information mapped to the physical member port receiving the first type of message; A response message sending unit, configured to send a response message to the user when the judgment result of the judging unit is yes, and the response message carries the virtual MAC address in the TRUNK sub-interface information. 14. The apparatus of claim 10, wherein: The selecting unit is configured to select the second physical member port according to the user ID in the TRUNK sub-interface information mapped to the first physical member port and according to the principle of balancing user IDs of each physical member port. 15. A network system, characterized by comprising: a routing device and a switch, The routing device is configured to confirm that the first physical member port is unavailable, select a second physical member port, and send the virtual MAC address corresponding to the first physical member port to the second physical member port; the first physical member The virtual MAC address corresponding to the port is: the virtual MAC address allocated for the TRUNK sub-interface mapped to the first physical member port; sending a message carrying the virtual MAC address to the switch connected to the second physical member port ; The switch is configured to receive the message carrying the virtual MAC address.

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