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Route permeating method

A routing and router technology, applied in the field of data communication, can solve problems such as the non-optimal path of the entire path

Active Publication Date: 2008-07-23
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a routing penetration method to solve the problem that in the existing routing selection technology, only the optimal path within the area may be selected, but the entire path is not the optimal path

Method used

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Embodiment Construction

[0046] The invention provides a route penetration method, which can overcome the shortcomings of the prior art and realize the selection of the shortest route.

[0047] The method adopted by this route penetration technology is that when the ABR router in the stub area receives the Type 5 LSA and calculates the external route, it will generate a Type 3 LSA for this route, which carries the metric (distance) from the ABR to the destination network segment metric, and advertise this type 3 LSA to the inside of the stub area, so that the routers inside the stub area can know the metric information of the entire path and choose the optimal path.

[0048] The present invention adopts following technical scheme:

[0049] The key mechanism of the present invention is: when the border router in the stub area receives Type 5 LSAs and calculates the external routes based on these Type 5 LSAs, according to the configured route filtering strategy, it selectively generates 3 external route...

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Abstract

The invention provides a route penetrating method, which comprises the following steps: calculating external route with a zone boundary router, generating link circuit status notice which can get into a zone interior router according to the external route, noticing the link circuit status notice which is generated by the zone boundary router to the zone interior router, calculating the zone interior router which gets to the zone boundary router with the zone interior router, and calculating the route which gets to zone exterior destination network segments according to the external route in the link circuit status notice which is received. The route penetrating method which is put forward by the invention selectively penetrates route in the exterior of a zone into a zone, thereby leading the zone interior router to know the circumstance of external network topology, and further choosing an optimum route.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a routing penetration method based on an open shortest path priority protocol. Background technique [0002] Open Shortest Path First (OSPF) is currently the most widely used interior gateway protocol. It is a dynamic routing protocol based on link state. Routers describe it by generating and exchanging Link State Announcement (LSA) information. According to the topology of the network, the routing calculation and control of the ultra-large-scale network can be realized through hierarchical area division. [0003] An OSPF area is a logical division of routers and their links that run the OSPF protocol inside an autonomous system (AS). Multiple routers can belong to the same area, and the routers in the same area exchange LSA information with each other and store them in the LSA database, so the link state databases of the routers in the area are completely consistent. Accordin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/46H04L45/02
Inventor 金昊沈晓峰王会来
Owner ZTE CORP
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