Echo message-based multi-hop detection implementation method

An implementation method and message technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as cumbersome detection process, achieve the effect of simplifying the detection process and improving the utilization rate

Active Publication Date: 2015-05-20
FENGHUO COMM SCI & TECH CO LTD
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Problems solved by technology

Therefore, for any path between two systems in the network, if BFD technology is required to detect, since Echo packets do not have multi-hop format, multi-hop inspection of BFD control packets is required, and the starting point of

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  • Echo message-based multi-hop detection implementation method
  • Echo message-based multi-hop detection implementation method
  • Echo message-based multi-hop detection implementation method

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[0024] The present invention will be further described in detail below in conjunction with the drawings and embodiments.

[0025] The method for implementing multi-hop detection based on Echo messages in the present invention, the specific steps are as follows:

[0026] S1. Such as figure 1 As shown, the configuration of two routers is divided into a local router and a destination router. The local router and the destination router belong to two systems respectively, and the local router interface IP (IP1) and the destination router interface IP (IP2) are configured by routing Multi-hop reachability, you can use static routing or routing protocols such as ospf, that is, ping IP2 on router A, you can ping through; ping IP1 on router B, you can ping through.

[0027] S2. The local router configures the multi-hop Echo message of BFD and creates a multi-hop Echo message session. The destination IP of the Echo packet multi-hop session is IP2, and the source IP is IP1. The local router f...

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Abstract

The invention discloses an Echo message-based multi-hop detection implementation method, and relates to the field of BFD (Bidirectional Forwarding Detection) protocol multi-hop detection. Routability is configured between two routers; an Echo message is established by a local router and transmitted to a target router; the packaging format of the Echo message is destination Mac+source Mac+0800+IP (Internet Protocol) layer payload+UDP (User Datagram Protocol) layer payload+BFD payload, wherein a destination IP included in the IP layer payload is a destination router interface IP and a source IP is a local router interface IP; after the Echo message is received by the destination router, the destination IP in the IP layer payload is changed into the local router interface IP, and the source IP is changed into the destination router interface IP to form a reply message to be transmitted to the local router; after the reply message is received by the local router, detection is performed according to the BFD protocol regulations. Multi-hop detection is realized through the Echo message, reply establishment of destination equipment is avoided and a state machine thereof is maintained, and the detection process is simplified.

Description

technical field [0001] The invention relates to the field of BFD protocol multi-hop detection, in particular to a method for realizing multi-hop detection based on Echo messages. Background technique [0002] BFD (Bidirectional Forwarding Detection, bidirectional forwarding detection) can detect communication failures with adjacent devices as soon as possible, so that timely measures can be taken, requiring network devices to quickly detect failures and switch traffic to backup links to speed up network convergence , so as to ensure the continuation of services, reduce the impact of equipment failures or link failures on services, and improve network availability. BFD has been widely used in communication equipment. [0003] BFD sessions work in two ways: [0004] Control packet mode: The sessions at both ends of the link monitor the link status through the interaction of control packets. [0005] Echo message mode: One end of the link sends an Echo message and the other e...

Claims

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Application Information

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IPC IPC(8): H04L12/703H04L12/26H04L45/28
Inventor 李明明
Owner FENGHUO COMM SCI & TECH CO LTD
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