Method and device for realizing rip fast rerouting

A routing and fast technology, applied in the field of communication, can solve problems such as backup link data flow interruption, achieve the effect of improving reliability, avoiding manual configuration and dependence on optimal routing, and avoiding data flow interruption

Active Publication Date: 2018-01-09
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the network topology changes, the backup link cannot adapt to the change of the network, which may cause data flow interruption caused by the unreachability of the backup link.

Method used

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  • Method and device for realizing rip fast rerouting
  • Method and device for realizing rip fast rerouting
  • Method and device for realizing rip fast rerouting

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Embodiment Construction

[0016] In practical applications, if a router in the network learns a new route, it will optimize the RIP route. If the optimized route forms an equal-cost route, it will deliver the equivalent route; if the optimized route does not form For equal-cost routes, you need to check whether a backup route is configured for this route in the routing policy. If yes, then combine the optimal route after optimization and the backup route configured in the routing policy into FRR delivery; if not, only the preferred route The final optimal route is delivered as a common route. Among them, the optimal route refers to the route with the least cost of the router to reach the destination address; the equivalent route refers to the cost of any one of the routes used by the router to reach the destination address is the same; the backup route refers to the route used as a backup when the optimal route is unreachable; FRR refers to the combination Routes include optimal routes and backup route...

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Abstract

The present invention provides a method and device for implementing RIP fast rerouting, which are applied to routers in a RIP network running Routing Information Protocol, wherein the method includes: updating the RIP routing table; updating the optimal route in the RIP routing table and the suboptimal route containing the backup tag are delivered as fast rerouting FRR. Through the technical scheme of the invention, the dependence of the backup route on the optimal route can be avoided, and the reliability of RIP fast rerouting can be improved.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a method and device for realizing RIP fast rerouting. Background technique [0002] RIP (Routing Information Protocol, Routing Information Protocol) is a protocol based on a DV (Distance-Vector, distance vector) algorithm, which exchanges routing information through UDP (User Datagram Protocol, User Datagram Protocol) messages. [0003] BFD (Bidirectional Forwarding Detection, bidirectional forwarding detection) is a general, standardized, medium-independent and protocol-independent fast fault detection mechanism, which is used to detect the connectivity of links in IP networks and ensure that communication between devices can be quickly detected faults, so that measures can be taken in time to ensure the continuous operation of the business. [0004] RIP FRR (Fast ReRoute, fast rerouting) uses technologies such as BFD to perform link detection. If a failure of the primar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/711H04L12/703H04L45/247H04L45/28
Inventor 王剑鸣
Owner NEW H3C TECH CO LTD
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