Link failure processing method and data forwarding device

Abstract

The embodiment of the invention provides a link failure processing method and a data transmitting device, wherein the method comprises detecting that a link goes wrong, starting a timer, sending out failure detecting conversation dropping notice, receiving a detecting message by the timer before time over, keeping the neighbor relationship with a neighbor route device connected through a link, generating route information, and sending out the route information. The invention simultaneously provides a data transmitting device for implementing the method. The embodiment of the invention can shorten the convergence time length of an upper-layer application module, improves the convergence property, and saves CPU resource of the data transmitting device, and improves the working property thereof.

Description

technical field [0001] The invention relates to communication technology, in particular to a link failure processing method and a data forwarding device. Background technique [0002] With the rapid popularization of the network and the continuous enrichment of network applications, the traffic on the network continues to expand, the scale of the network is also increasing, and the network devices in it are becoming more and more difficult to maintain and manage. For this reason, an increasingly important feature that network equipment is required to have is: network equipment is required to have a fault detection function, so that when the path between adjacent network equipment fails during the communication process, the network equipment can detect the failure. Perform rapid detection, quickly establish a new communication channel to replace the faulty communication channel, or switch the communication from the faulty communication channel to other links. Some existing n...

AI Technical Summary

Problems solved by technology

[0012] When the BFD module detects a link failure, the IGP module breaks the neighbor relationship with the corresponding router using the failed link, generates new link state information, and spreads the information of network topology changes to all routers in the same autonomous domain, and Notify the BFD module to delete the BFD message. After the faulty link recovers, the IGP module will rely on its own slow Hello mechanism to rediscover the neighbor router and establish a neighbor relationship with the neighbor router, and calculate the route to the neighbor router. At this time, If the link between the routers is disconnected temporarily, that is, the short-term link failure that can be quickly recovered, and the link failure time is shorter than the sending period of the Hello message, for example, the link failure time is milliseconds, the The default time for the IGP module to send Hello packets is relatively long, generally 10 seconds, and it takes a long time to re-establish the neighbor relationship. The link can only be used after routing calculation. The convergence time of the IGP module is longer, which reduces the convergence performance of the faulty link recovery; and a large number of routing calculations consume a large number of central processing units (Central Processing Units, hereinafter referred to as : CPU) resources, affecting the performance of the router

Images