Route convergence method and device

Abstract

The invention provides a route convergence method and device which can be applied to network equipment. The network equipment includes a first interface and a second interface, the first interface is attached to a first interface board, and the second interface is attached to a second interface board. The route convergence method includes the steps of: if the first interface board is restarted, obtaining FIB table items of all the other interface boards of the network equipment from a main control board, and issuing the FIB table items to a driver of the first interface board; after all the FIB table items are issued to the driver of the first interface board, sending a message of synchronous completion of the FIB table items to a corresponding protocol progress through an RIB process; and searching an enabling interface on the first interface board through the protocol process, and establishing a neighbor with opposite-terminal equipment through the enabling interface. The route convergence method solves the problem of packet loss.

Description

technical field [0001] The present application relates to communication technologies, and in particular to a route convergence method and device. Background technique [0002] The current mainstream unicast routing protocols mainly include Open Shortest Path First (OpenShortestPathFirst, OSPF), intermediate system to intermediate system (Intermediatesystemtointermediatesystem, ISIS) and Border Gateway Protocol (BorderGatewayProtocol, BGP). Fast convergence is an important index to measure the quality of a routing protocol. [0003] by figure 1 Take the networking diagram shown as an example to measure the convergence speed of routing protocols. in, figure 1 OSPF is used as an example for illustration, and other routing protocols are similar. like figure 1 As shown, an OSPF neighbor relationship is established between RT-1, RT-2, RT-3, and RT-4. The RT-4 device accesses the same route through the B interface and the C interface, and accesses the traffic of these routes ...

AI Technical Summary

Problems solved by technology

[0007] However, packet loss may occur during traffic switchover in the above application scenarios. For example, in application scenario 1, after the interface board is restarted and all forwarding table (FIB) entries have not been synchronized from other interface boards, the The traffic comes first, resulting in packet loss; in application scenario 2, when the neighbor device’s route calculation, including FIB entry delivery, is faster than the local device’s drive, the neighbor device’s traffic comes first, and the local device’s FIB entry is still Synchronization is not completed, resulting in packet loss

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