Method for updating OSPF (open shortest path first) route and OSPF router

A router and routing technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems that affect the convergence speed of OSPF routing, achieve the effect of reducing the amount of calculation, reducing the workload, and speeding up the convergence speed

Active Publication Date: 2012-01-11
NEW H3C TECH CO LTD
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Problems solved by technology

In this way, when updating routes, all external routes are frequently calculated, which seriously affects the overall convergence speed of OSPF routes.

Method used

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  • Method for updating OSPF (open shortest path first) route and OSPF router
  • Method for updating OSPF (open shortest path first) route and OSPF router
  • Method for updating OSPF (open shortest path first) route and OSPF router

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Embodiment Construction

[0055] In this section of the detailed description, there is shown and described the preferred embodiment of the invention by way of illustration only of the best mode contemplated by the inventors for carrying out the invention. As will be realized, the invention may be modified in various obvious respects without departing from the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0056] In order to realize the purpose of the invention, the invention provides a method for updating OSPF routes. An exemplary flowchart of the method can be found in image 3 . Specifically, in step 301, save each external associated route of the OSPF route; and record the external link state advertisement LSA corresponding to each external associated route; Determine whether each external association route has changed before and after the calculation, if there is no change, then end the current update process; if there is ...

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Abstract

The invention discloses a method for updating an OSPF (open shortest path first) route, and an OSPF router. When the OSPF route is updated, through finding out an external relevant route which changes and an external LSA (link state advertisement) corresponding to the external relevant route, an OSPF external route which is influenced is only calculated necessarily without executing the complete calculation of the OSPF external route when the OSPF external route is calculated; the workload of calculating the external route is reduced; the integral convergence speed of the OSPF route is quickened; and the calculation amount is reduced when the OSPF route is updated.

Description

technical field [0001] The invention relates to an Open Shortest Path First (OSPF, Open Shortest Path First) routing protocol technology, in particular to a method for updating OSPF routing and an OSPF router. Background technique [0002] OSPF is a hierarchical routing protocol, and the largest entity in its hierarchy is an autonomous system (AS, Autonomous System), that is, a part of network entities managed under a common routing policy. In AS, the network is divided into different areas. Areas logically divide routes into different groups, and each group is identified by an area number. see figure 1 , figure 1 Schematic diagram of OSPF area division. In OSPF, area 0 is the backbone area. [0003] OSPF routers are classified into the following four types according to their positions in the AS: [0004] Internal Router (Internal Router), all interfaces of this router belong to the same OSPF area; [0005] Area Border Router (ABR, Area Border Router), which is us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L45/02
Inventor 林长望罗国兵刘畅王克峰徐婧
Owner NEW H3C TECH CO LTD
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