LSA synchronizing method and device

Abstract

The invention discloses an LSA synchronizing method and device. The LSA synchronizing method comprises the steps that a network device traverses all interfaces in the network device, route distinguishers of neighboring network devices corresponding to the interfaces are determined, the LSDB types of the interfaces are determined, and the interfaces corresponding to the same LSDB type and the same route distinguisher are placed into the same interface set; when the network device receives an LSA from one neighboring network device through one interface in some interface set, the LSA is forbidden to be sent to the neighboring network device through other interfaces in the interface set. According to the LSA synchronizing method and device, redundant sending of the LSA can be avoided, the bandwidth occupied by synchronizing LSAs is reduced, and the network transmission burden can be reduced.

Description

technical field [0001] The present invention relates to the technical field of data communication, in particular to an LSA (Link State Advertisement, Link State Advertisement) synchronization method and device. Background technique [0002] OSPFv3 (Open Shortest Path First, open shortest path first version 3) is a link state-based autonomous system internal routing protocol. Its working mechanism is to establish and maintain neighbor relationships between network devices through periodic notification of Hello packets. , the LSA that describes the link state is diffused between the network devices that form an adjacency relationship, and each network device finally forms the same LSDB (Link State Data Base, link state database), and the routing calculation is performed on the basis of the LSDB to generate routing information Save to RIB (Routing Information Base, routing information table), RIB selects the optimal route and sends it to FIB (Forwarding Information Base, forwar...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, after a network device receives an LSA from a neighbor network device through an interface, it needs to diffuse the LSA through all other interfaces to ensure that the LSA is synchronized on the entire network, but it will lead to redundant sending of the LSA

by figure 1 Take the application scenario shown as an example. There are three links between network device A and network device B. After network device B receives an LSA from network device A through interface 1, it needs to dediffuse the LSA through interface 2 and interface 3. , that is, the LSA is sent to network device A through interface 2, and the LSA is sent to network device A through interface 3. Obviously, the LSA sent to network device A through interface 2 and interface 3 is unnecessary, which will cause Redundant sending of LSA increases network transmission burden

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