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Graceful restart method based on OSPF (Open Shortest Path First Interior Gateway Protocol) protocol and router thereof

A graceful restart, router technology, applied in the field of communication, can solve the problems such as the inability to perform uninterrupted service upgrades, and the inability to determine GR synchronization.

Active Publication Date: 2012-05-09
XINHUASAN INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is no backup OSPF, it is impossible to determine whether GR synchronization needs to be performed after the switchover restarts because the reason for the restart is unknown and there is no neighbor information. As a result, when there is no backup OSPF, it is impossible to perform In-Service Software Upgrade (ISSU)

Method used

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  • Graceful restart method based on OSPF (Open Shortest Path First Interior Gateway Protocol) protocol and router thereof
  • Graceful restart method based on OSPF (Open Shortest Path First Interior Gateway Protocol) protocol and router thereof
  • Graceful restart method based on OSPF (Open Shortest Path First Interior Gateway Protocol) protocol and router thereof

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the solutions of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0020] The present invention proposes a smooth restart method based on the OSPF protocol, which records the neighbor information of the current OSPF protocol, records the neighbor information in real time when the OSPF protocol is normal, and records the neighbor information to a storage space, which can be a disk or a memory , to be determined according to the actual situation during the specific implementation.

[0021] join figure 2 , figure 2 It is a flow chart of the graceful restart method in the embodiment of the present invention. The specific steps are:

[0022] Step 101, when the router obtains the ISSU message, it records the restart reason, and notifies the neighbor corresponding to the neighbor information in the recor...

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Abstract

The invention discloses a graceful restart method, which comprises the following steps of: recording neighbor information in advance; when the OSPF protocol needs to be restarted, recording a restarting reason, and notifying the neighbor corresponding to the neighbor information in a record to enter a help flow; and after the OSPF protocol is restarted, carrying out a GR (Graceful Restart) flow according to the recorded restarting reason and the neighbor information. The invention also provides a router which can carry out uninterrupted service upgrade under the condition that the OSPF is not prepared.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an OSPF protocol-based smooth restart method and a router. Background technique [0002] Open Shortest Path First Graceful Restart (OSPF GR) is a method of backing up OSPF configuration information, OSPF performs a smooth restart during protocol restart or active-standby switchover, obtains neighbor relationships from neighbors, and synchronizes the link state database (LSDB) , so as to ensure the mechanism of uninterrupted forwarding service. GR has two roles: a router that has the GR capability when a protocol restart or active / standby switchover occurs; a router that has a neighbor relationship with the router that has a protocol restart or active / standby switchover and assists in completing the GR process. [0003] see figure 1 , figure 1 It is a schematic diagram of the existing network structure that implements OSPF restart without backup. figure 1 Among them, rou...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/56H04L45/122H04L45/60
Inventor 林长望罗国兵胡闽
Owner XINHUASAN INFORMATION TECH CO LTD
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