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Communication method and device

A communication method and router technology, applied in the field of communication, can solve problems such as failure to support, affect normal establishment of business messages, normal transmission of business messages, and failure of communication between two routers, so as to achieve the effect of speeding up

Active Publication Date: 2019-06-11
BEIJING HUAWEI DIGITAL TECH
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Problems solved by technology

[0002] During the operation of the current network, the two core routers may communicate through a Layer 2 switch network. If the maximum transmission unit (MTU) supported by the interface configured by the two routers is greater than the MTU configured by the middle switch, one When a message sent by a router to another router passes through an intermediate switch, the switch will directly discard the message because it cannot support the MTU of the message, resulting in the inability of the two routers to communicate, which will affect the communication between the two routers. The normal establishment of the neighbor relationship between the protocols and the normal transmission of business packets

Method used

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Embodiment Construction

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0055] In the following, some terms used in the embodiments of the present application are explained, so as to facilitate the understanding of those skilled in the art.

[0056] 1) A router is a device that connects various LANs and WANs in the Internet. Routing takes place at the third layer of the open system interconnection (OSI) reference model (this article is also called a three-layer network) , that is, the network layer, the router will automatically select and set the route according to the channel situation, and send the signal in the order of the best path.

[0057] A router, which can also be understood as a gateway device (gateway), is used to connect multiple logically separated networks. The so-called logi...

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Abstract

The invention discloses a communication method and device which is used for enabling two routers to normally communicate under the scene that MTUs supported by interfaces configured by the two routersare greater than MTUs configured by an intermediate switch. The communication method comprises the steps that a first router sends at least one first detection message to a second router, and the first detection message packages a first MTU; the first router determines that the first detection feedback message is not received from the second router within the set duration, wherein the first detection feedback message is a feedback message of the first detection message; the first router cuts the first MTU for a first step length to obtain a second MTU; the first router sends at least one second detection message encapsulating the second MTU to the second router until the first router receives the detection feedback message from the second router within a set time length; and the first router takes the third MTU obtained by the last cutting as the MTU supported by the transmission path between the first router and the second router.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a communication method and device. Background technique [0002] During the operation of the current network, the two core routers may communicate through a Layer 2 switch network. If the maximum transmission unit (MTU) supported by the interface configured by the two routers is greater than the MTU configured by the middle switch, one When a message sent by a router to another router passes through an intermediate switch, the switch will directly discard the message because it cannot support the MTU of the message, resulting in the inability of the two routers to communicate, which will affect the communication between the two routers. The normal establishment of the protocol neighbor relationship between them and the normal transmission of service packets. Contents of the invention [0003] The embodiment of the present application provides a communicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/721H04L12/751H04L45/02
Inventor 李皆明
Owner BEIJING HUAWEI DIGITAL TECH
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