Route information update method and network equipment based on OSPF

Abstract

A method for updating route information based on OSPF can completely avoid recalculation course of network topology in OSPFv3 region and IPv6 prefix route information by only carrying out incremental calculation on state circular note of prefix link for rising convergence speed of route calculation when IPv6 prefix address is changed.

Description

technical field [0001] The invention relates to the technical field of OSPF (Open Shortest Path First, open path shortest priority) route selection, in particular to an OSPF-based route information update method and network equipment. Background technique [0002] OSPFv3 (Open Shortest Path First Version 3, Open Shortest Path First Version 3) is an IPv6-based routing protocol. OSPFv3 broadcasts link state information through LSA (Link State Announcement, Link State Announcement), and calculates the route from the network node to the destination according to SPF (Shortest Path First, shortest path first algorithm), and downloads the routing information to the IP forwarding layer , to guide packet forwarding. [0003] The routing method in the OSPFv3 calculation area includes the following two steps: [0004] The first step is to calculate the network topology in the area, that is, to calculate the routes to the transit network (Transit Network) and the transit router (Trans...

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Problems solved by technology

[0012] For IPv6 networks, the configuration and deletion of IPv6 addresses are usually relatively frequent, which will cause frequent changes in the IPv6 prefix addresses of routers in the OSPFv3 area, so that the routers in the area need to frequently calculate the logical topology of the shortest path tree and IPv6 prefix routes information, not only occupies a large amount of CPU resources in the system, but also causes the routing information to oscillate, slowing down the convergence of routing calculations.

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