A route information spreading method and router

Abstract

The invention discloses a method for transmitting route information, which includes the following steps: if a target router needs to restrict the LSDB scale, an uplink neighbor router of the target router generates a default LSA; when the uplink neighbor router releases LSA to the target router, the uplink neighbor router only releases the default LSA and the RouterLSA generated by the uplink neighbor router to the target router. The default LSA released to the target router is used for providing default router for the target router and ensures that the target router forwards the message whichfails to match with router to the uplink neighbor router according to the default LSA. The invention also discloses a router which comprises an OSPF interface unit, a memory unit and an LSA processing unit. The invention can operate the OSPF protocol on middle-and low-end routers.

Description

technical field [0001] The invention relates to an open shortest path first (OSPF) routing protocol technology, in particular to a routing information dissemination method and a router. Background technique [0002] OSPF is a link-state-based interior gateway protocol developed by the IETF. Routers using the OSPF protocol transmit routing information to each other through link state reports (LSA). Each router running the OSPF protocol always uses LSA to describe the connection status of the local network, such as available interface information and reachable neighbor information. And broadcast to the entire autonomous system. In this way, each router has received the LSAs generated by all routers in the autonomous system, and the collection of all LSAs constitutes the Link State Database (LSDB). Since each LSA is a description of the network topology around a router, the entire LSDB is a true reflection of the network topology of the autonomous system. Among them, LSA is ...

AI Technical Summary

Problems solved by technology

Such a large number of interfaces frequently send RIP routing information, which will cause the router CPU to be busy intermittently, causing many hidden dangers, such as packet loss, etc.

[0008] Visible, in figure 1 and figure 2 In the networking environment shown, there are problems in the application of OSPF and RIP protocols in the access layer routers, and it is impossible to guarantee the stable operation of routing protocols in the middle and low-end routers in the access layer to complete packet routing.

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