CN105450519B - The sending method and core switch of message - Google Patents

Abstract

The invention provides a message sending method and a core switch. The method includes: receiving a request message sent by the first access switch, where the request message carries destination address information; if it is determined that the destination address information is address information of an external device, then sending the request message to the first router, so that The first router sends the request message to the corresponding external device according to the destination address information; if the reply message sent by the first router is not received within the preset time, it sends the request message according to the first preset strategy or the second preset strategy The corresponding access switch sends a request message, and the request message also carries an external fault identifier, so that the access switch that receives the request message records the external fault information of the first core switch according to the external fault identifier, and passes the second core switch The switch forwards the request message to the second router, so that the second router sends the request message to the corresponding external device according to the destination address information.

Description

Message sending method and core switch

technical field

The embodiments of the present invention relate to the technical field of communications, and in particular, to a message sending method and a core switch.

Background technique

In the existing network access system, the server forwards the message in the server through the access switch, the core switch and the router, and provides the service for users to access the external network. FIG. 1 is a schematic structural diagram of an existing network. As shown in FIG. 1, when the server 11a and the server 11b need to send a message to the external device 15, they need to pass through the access switch 12a, the access switch 12b, the access switch 12c, or any access switch in the access switch 12d. The message is forwarded to the core switch 13a or 13b, and the core switch 13a forwards the message to the external device 15 through the router 14a or the core switch 13b sends the message to the external device 15 through the router 14b. The arrow parts from the server 11 a to the external device 15 in FIG. 1 are certain two links through which the server 11 a sends messages to the external device 15 .

When a core switch fails and the access switch detects that the packet cannot be forwarded by the core switch, it will send the packet to another core switch to realize the forwarding of the packet by subsequent routers, and finally send to an external device.

However, when the router or the link between the router and the core switch fails, the access switch will continue to send packets to the core switch because the core switch will still receive packets normally. If the path fails, the packets sent by the access switch cannot be processed, resulting in packet loss or congestion in the core switch, which affects the use of services by users and degrades user experience.

Contents of the invention

Embodiments of the present invention provide a message sending method and a core switch. The method avoids message loss or congestion in a certain core switch, enables users to use services normally, and improves user experience.

An embodiment of the present invention provides a method for sending a message, including:

The first core switch receives a request message sent by the first access switch, where the request message carries destination address information;

If the first core switch determines that the destination address information is the address information of an external device, the first core switch sends the request packet to the first router, so that the first router Send the request message to the corresponding external device;

If the first core switch does not receive the reply message sent by the first router within the preset time, the first core switch sends a request message to the corresponding access switch according to the first preset strategy or the second preset strategy The request message also carries an external fault identifier, so that the access switch that receives the request message records the external fault information of the first core switch according to the external fault identifier, and transmits the external fault information through the second core switch. The request message is forwarded to the second router, so that the second router sends the request message to the corresponding external device according to the destination address information.

An embodiment of the present invention provides a core switch, including:

A receiving module, configured to receive a request message sent by the first access switch, where the request message carries destination address information;

The first sending module is configured to send the request message to the first router if it is determined that the destination address information is the address information of the external device, so that the first router sends the request message according to the destination address information Send the file to the corresponding external device;

The second sending module is also used to send the request message to the corresponding access switch according to the first preset strategy or the second preset strategy if the reply message sent by the first router is not received within the preset time, The request message also carries an external fault identifier, so that the access switch that receives the request message records the external fault information of the first core switch according to the external fault identifier, and reports the request to the second core switch through the second core switch. The request message is forwarded to the second router, so that the second router sends the request message to the corresponding external device according to the destination address information.

Embodiments of the present invention provide a message sending method and a core switch. By receiving a request message sent by a first access switch, the request message carries destination address information; if the destination address information is determined to be the address information of an external device, Then send the request message to the first router, so that the first router sends the request message to the corresponding external device according to the destination address information; if the reply message sent by the first router is not received within the preset time, then According to the first preset strategy or the second preset strategy, a request message is sent to the corresponding access switch, and the request message also carries an external fault identifier, so that the access switch that receives the request message records according to the external fault identifier. The first core switch externally connects the fault information, and forwards the request message to the second router through the second core switch, so that the second router sends the request message to the corresponding external device according to the destination address information. This avoids packet loss or congestion in a certain core switch, enables users to use services normally, and improves user experience.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of an existing network;

FIG. 2 is a flow chart of Embodiment 1 of the message sending method of the present invention;

FIG. 3 is a flow chart of Embodiment 2 of the message sending method of the present invention;

FIG. 4 is a schematic structural diagram of Embodiment 1 of a core switch according to the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

FIG. 2 is a flowchart of Embodiment 1 of the message sending method of the present invention. As shown in FIG. 2 , the message sending method provided in this embodiment is established on the existing network provided in FIG. 1 . Wherein, the existing network provided in FIG. 1 is only a schematic diagram, and the number of servers, the number of access switches connected to each server, and the number of core switches may vary in actual applications. In this embodiment, the message sending method provided by this embodiment is described by taking the server 11 a sending a message to the external device 15 in FIG. 1 as an example. Then the message sending method provided by this embodiment includes:

In step 201, the first core switch receives a request message sent by the first access switch, and the request message carries destination address information.

In this embodiment, in the existing network provided in FIG. 1, the server 11a can obtain external network services through access switches, core switches, and routers by forwarding messages, and the server 11a can also obtain internal network services from the server 11b through access switches and core switches. web service. Therefore, when the server sends a request message, the request message carries destination address information, and each forwarding device can know whether the server 11a obtains the external network service through the destination address information. When the server obtains external network services, when the server selects the access switch to forward the message, it can choose the access switch with the smallest load to forward the message according to the load of each access switch connected to it. One of the access switches is randomly selected to forward the request message, which is not limited in this embodiment.

In this embodiment, no matter whether the server obtains the internal network service or the external network service, the request message is forwarded through the access switch and the core switch. In this embodiment, the message sending method provided by this embodiment is described by taking the server 11a through an uplink first as: server 11a-access switch 12a-core switch 13a-router 14a-external device 15 as an example. Wherein, the access switch 12a is a first access switch, the core switch 13a is a first core switch, and the router 14a is a first router.

In this embodiment, the server 11a sends a request message to the first access switch, and the first access switch forwards the request message to the first core switch. The first core switch receives the request message sent by the first access switch, and the request message carries destination address information. Wherein, the destination address information may be an IP address, a MAC address, etc. of the destination device.

Step 202, if the first core switch determines that the destination address information is the address information of the external device, the first core switch sends the request packet to the first router, so that the first router sends the request packet to the corresponding external devices.

In this embodiment, the first core switch judges whether the destination address information is the address information of the external device, so that the first core switch judges according to the destination address information whether the purpose of the server sending the request message is to obtain external network services or internal network services, If the destination address information is the address information of the external device, it means that the server needs to obtain external network services to send the request message, and the first core switch sends the request message to the first router, so that the first router sends the request message according to the destination address information. The message is sent to the corresponding external device.

In this embodiment, if the destination address information is the address information of the intranet device, such as the destination address information of the server 11b, it means that the server needs to obtain the intranet service to send the request message, and the first core switch is connected to the intranet device The access switch corresponding to the destination address sends the request message, so that the access switch sends the request message to the intranet device. For example, the destination address information is the address information of the server 11b in the intranet. Then the first core switch may send the request message to the access switch 12b, and the access switch 12b sends the request message to the server 11b.

Step 203, if the first core switch does not receive the reply message sent by the first router within the preset time, the first core switch sends a request to the corresponding access switch according to the first preset strategy or the second preset strategy message, the request message also carries an external fault ID, so that the access switch that receives the request message records the external fault information of the first core switch according to the external fault ID, and forwards the request message to the The second router, so that the second router sends the request message to the corresponding external device according to the destination address information.

In this embodiment, after the first core switch sends a request message to the router, if the request message is successfully sent to the first router, the first router sends a reply message to the first core switch in time, if the first core switch If the reply message sent by the first router is not received within the preset time, it means that the uplink of the first core switch fails, and the uplink failure includes: the failure of the first router or the failure of the first core switch If the link between them is faulty, the first core switch sends a request message to the corresponding access switch according to the first preset strategy or the second preset strategy.

Wherein, the preset time is preset, for example, it may be 2 seconds or other values, which is not limited in this embodiment.

In this embodiment, the request message sent by the first core switch to the corresponding access switch according to different policies carries an external fault identifier, and the external fault identifier can be added to the free field of the message header in the request message . Make the access switch that receives the request message record the external fault information of the first core switch according to the external fault identifier, and forward the request message to the second router through the second core switch, so that the second router will send the request message according to the destination address information The request message is sent to the corresponding external device.

An example is: the first core switch sends a request message back to the first access switch 12a that originally sent the request message according to the first preset policy, and adds an external fault identification in the free field of the message header in the request message , the first access switch 12a records the external fault information of the first core switch according to the external fault identification information added in the free field, and the first access switch 12a sends the external fault information to the second core switch connected to it, such as the core switch 13b request message, the second core switch forwards the message to a second router, such as router 14b, so that router 14b sends the request message to the external device 15 according to the destination address information.

In the message sending method provided in this embodiment, the first core switch receives the request message sent by the first access switch, and the request message carries destination address information; if the destination address information is the address information of an external device, the first The core switch sends the request message to the first router, so that the first router sends the request message to the corresponding external device according to the destination address information; if the first core switch does not receive the request message sent by the first router within the preset time Reply message, then the first core switch sends a request message to the corresponding access switch according to the first preset strategy or the second preset strategy, and the request message also carries an external fault identification, so that the user who receives the request message The access switch records the external fault information of the first core switch according to the external fault identifier, and forwards the request message to the second router through the second core switch, so that the second router sends the request message to the corresponding The external device can send the message to the external device through the second core switch and the second router when the uplink of the first core switch fails, avoiding the situation that the message is lost or congested in a certain core switch, Enable users to use the business normally, thereby improving user experience.

Fig. 3 is the flow chart of the second embodiment of the message sending method of the present invention. As shown in Fig. 3, the execution subject of the message sending method provided in this embodiment is a core switch, and the message sending method provided in this embodiment includes :

In step 301, the first core switch receives a request message sent by the first access switch, and the request message carries destination address information.

In this embodiment, step 301 is the same as step 201 in Embodiment 1 of the message sending method provided by the present invention, and will not be repeated here again.

Step 302, the first core switch judges whether the destination address information is the address information of the external device, if yes, execute step 303, if not, execute step 304.

In this embodiment, if the first core switch determines that the destination address information is the address information of the external device, it means that the server needs to obtain external network services to send the request message; if it is determined that the destination address information is not the address information of the external device, but is The address information of the device indicates that the server needs to obtain intranet services to send the request message.

Step 303, the first core switch sends the request packet to the first router.

In this embodiment, when the first core switch determines that the destination address information is the address information of the external device, it sends a request message to the first router connected to it, so that after the first router successfully receives the request message, it sends the request The message is sent to the external device.

Step 304, the first core switch sends the request message to the intranet device through the access switch.

In this embodiment, when the first core switch determines that the destination address information is the address information of the internal network device, the request message is sent to the internal network device through the access switch. The access switch is respectively connected to the first core switch and the intranet device.

Step 305, if the first core switch does not receive the reply message sent by the first router within the preset time, the first core switch sends a request to the corresponding access switch according to the first preset strategy or the second preset strategy message, the request message also carries an external fault ID, so that the access switch that receives the request message records the external fault information of the first core switch according to the external fault ID, and forwards the request message to the The second router, so that the second router sends the request message to the corresponding external device according to the destination address information.

Further, in this embodiment, if the first core switch does not receive the reply message sent by the first router within the preset time, the first core switch sends a request message to the corresponding access switch according to the first preset strategy. The text specifically includes:

The first core switch sends back the request packet to the first access switch.

Specifically, in this embodiment, the request message is sent to the first core switch through the first access switch, if the first core switch does not receive the reply message sent by the first router within the preset time, then The first core switch sends the request message back to the first access switch according to the original path, and the request message sent back carries the external fault identifier, so that the first access switch records the external fault identifier of the first core switch according to the external fault identifier. fault information, and forward the request message to the second router through the second core switch, so that the second router sends the request message to the corresponding external device according to the destination address information.

In this embodiment, if the first core switch does not receive the reply message sent by the first router within the preset time, the first core switch sends the request message back to the first access switch according to the original path. An access switch records the external fault information of the first core switch, so that when the first access switch receives other request messages sent by the server, according to the external fault information of the first core switch, the first access switch no longer The request message is forwarded through the first core switch, but the request message is forwarded to the second router through the second core switch, so that the second router sends the request message to the corresponding external device according to the destination address information. The packet forwarding rate of the first access switch is increased.

Or, further, in this embodiment, if the first core switch does not receive the reply message sent by the first router within the preset time, the first core switch sends a request to the corresponding access switch according to the second preset policy The message specifically includes:

The first core switch selects a second access switch with the smallest load from other access switches except the first access switch; the first core switch sends a request packet to the second access switch.

Specifically, in this embodiment, the first core switch detects the traffic of all its downlink port links, and selects the access switch with the smallest load among the access switches connected to it, and the access switch is the second access switch. switch, the first core switch sends the request message to the second access switch. Wherein, the access switches performing traffic detection are also respectively connected to the second core switches.

In this embodiment, if the first core switch does not receive the reply message sent by the first router within the preset time, the first core switch sends a message to the first access switch with the least load among the other access switches except the first access switch. The second access switch sends the request message, and records the external fault information of the first core switch in the second access switch, so that when the second access switch receives other request messages sent by the server, The switch is externally connected to the fault information, and the second access switch no longer forwards the request message through the first core switch, but forwards the request message to the second router through the second core switch, so that the second router forwards the request message according to the destination address information The message is sent to the corresponding external device. Since the load of each access switch is taken into consideration, the packet forwarding rate of the entire network is increased.

Step 306, if the first core switch receives the fault removal instruction sent by the first router, the first core switch sends an external fault removal message to the access switch that records the external fault information of the first core switch, and the external fault release message Carrying the external fault release flag in the network, so that the access switch that records the external fault information of the first core switch deletes the external fault information of the first core switch according to the external fault release flag.

Specifically, in this embodiment, when the fault of the uplink of the first core switch is resolved, and the fault of the first router or the link fault between the first core switch and the first router is resolved, the first router and the first When the core switch is reconnected, the first router will send a fault removal instruction to the first core switch. After receiving the fault removal instruction, the first core switch will send an external fault removal report to the access switch that has recorded the external fault information of the first core switch. arts. The external fault clearing message carries the external fault clearing identifier, for example, the external fault clearing identifier can be added to a free field in the message header of the fault clearing message. The access switch that has recorded the external fault information of the first core switch deletes the external fault information of the first core switch according to the external fault release flag. During the subsequent forwarding process of the request message, the request message may continue to be sent to the first core switch, and sent to the external device through the first router.

Wherein, if the first core switch sends the request message carrying the external fault identifier to the corresponding access switch according to the first preset strategy, the access switch recording the external fault information of the first core switch is the first access switch. switch, if the first core switch sends the request message carrying the external fault identifier to the corresponding access switch according to the second preset strategy, then the access switch that records the external fault information of the first core switch is the second access switch. switch.

In the message sending method provided in this embodiment, when the first core switch receives the fault removal instruction sent by the first router, the first core switch sends the external fault information to the access switch that records the external fault information of the first core switch. Release message, the external fault release message carries the external fault release identifier, so that the access switch that records the external fault information of the first core switch deletes the external fault information of the first core switch according to the external fault release identifier, so that the first core switch After the failure of the uplink of the core switch is removed, the first router connected to the first core switch is continued to forward the request message, so as to ensure the smooth progress of network communication.

FIG. 4 is a schematic structural diagram of Embodiment 1 of the core switch of the present invention. As shown in FIG. 4 , the core switch provided in this embodiment includes: a receiving module 401 , a first sending module 402 and a second sending module 403 .

Wherein, the receiving module 401 is configured to receive a request message sent by the first access switch, where the request message carries destination address information. The first sending module 402 is configured to send the request message to the first router if it is determined that the destination address information is the address information of the external device, so that the first router sends the request message to the corresponding external device according to the destination address information . The second sending module 403 is configured to send the request message to the corresponding access switch according to the first preset policy or the second preset policy if the reply message sent by the first router is not received within the preset time, The request message also carries an external fault identifier, so that the access switch that receives the request message records the external fault information of the first core switch according to the external fault identifier, and forwards the request message to the second router through the second core switch , so that the second router sends the request message to the corresponding external device according to the destination address information.

The core switch of this embodiment can execute the technical solution of the method embodiment shown in FIG. 2 , and its implementation principle and technical effect are similar, and details are not repeated here.

Further, the second sending module 403 is also configured to: if the receiving module 401 receives the fault removal instruction sent by the first router, send an external fault removal message to the access switch that records the external fault information of the first core switch, The external fault release message carries the external fault release identifier, so that the access switch that records the external fault information of the first core switch deletes the external fault information of the first core switch according to the external fault release identifier.

Further, the second sending module 403 is specifically configured to: send the request message back to the first access switch. Alternatively, the second sending module 403 is specifically configured to: select a second access switch with the smallest load from other access switches except the first access switch; and send a request packet to the second access switch.

Further, the external fault identifier is located in a free field of the message header of the request message, and the external fault release identifier is located in the free field of the message header of the external fault release message.

The core switch of this embodiment can execute the technical solution of the method embodiment shown in FIG. 3 , and its implementation principle and technical effect are similar, and details are not repeated here.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by program instructions and related hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (6)

1. A message sending method, characterized in that, comprising: The first core switch receives a request message sent by the first access switch, where the request message carries destination address information; If the first core switch determines that the destination address information is the address information of an external device, the first core switch sends the request packet to the first router, so that the first router Send the request message to the corresponding external device; If the first core switch does not receive the reply message sent by the first router within the preset time, the first core switch sends a request message to the corresponding access switch according to the first preset strategy or the second preset strategy The request message also carries an external fault identifier, so that the access switch that receives the request message records the external fault information of the first core switch according to the external fault identifier, and transmits the external fault information through the second core switch. Forwarding the request message to the second router, so that the second router sends the request message to the corresponding external device according to the destination address information; Wherein, the first core switch sending the request message to the corresponding access switch according to the first preset policy specifically includes: the first core switch sending back the request message to the first access switch; The first core switch sending the request message to the corresponding access switch according to the second preset policy specifically includes: the first core switch selects the first access switch with the smallest load from other access switches except the first access switch. Two access switches: the first core switch sends a request message to the second access switch. 2. The method according to claim 1, further comprising: If the first core switch receives the fault removal instruction sent by the first router, the first core switch sends an external fault removal message to the access switch that records the external fault information of the first core switch, and the external fault removal message The text carries an external fault release identifier, so that the access switch that records the external fault information of the first core switch deletes the external fault information of the first core switch according to the external fault release identifier. 3. The method according to claim 2, wherein the external fault identification is located in the idle field of the message header of the request message, and the external fault release identification is located in the message of the external fault release message in the free field of the header. 4. A core switch, characterized in that, comprising: A receiving module, configured to receive a request message sent by the first access switch, where the request message carries destination address information; The first sending module is configured to send the request message to the first router if it is determined that the destination address information is the address information of the external device, so that the first router sends the request message according to the destination address information Send the file to the corresponding external device; The second sending module is used to send the request message to the corresponding access switch according to the first preset strategy or the second preset strategy if the reply message sent by the first router is not received within the preset time, so The request message also carries an external fault identifier, so that the access switch that receives the request message records the external fault information of the first core switch according to the external fault identifier, and sends the request message to the request message through the second core switch. Forwarding to the second router, so that the second router sends the request message to the corresponding external device according to the destination address information; Wherein, the second sending module sends the request message to the corresponding access switch according to the first preset strategy or the second preset strategy, specifically including: sending the request message back to the first access switch; Alternatively, select a second access switch with the smallest load from other access switches except the first access switch; and send a request message to the second access switch. 5. The core switch according to claim 4, wherein the second sending module is further configured to: if the receiving module receives the fault removal instruction sent by the first router, record the first core switch The access switch with external fault information of the switch sends an external fault release message, and the external fault release message carries an external fault release identifier, so that the access switch that records the external fault information of the first core switch according to the external fault The fault removal flag deletes the external fault information of the first core switch. 6. The core switch according to claim 5, wherein the external fault identification is located in the free field of the message header of the request message, and the external fault release identification is located in the message of the external fault release message. In the free field of the header.