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Information synchronizing method, device and system of link state database of GR (Graceful Restart) scene

A link status and information synchronization technology, applied in the network field, can solve problems such as low efficiency, prolonged adjacency establishment time, and longer GR time, so as to reduce GR time and improve efficiency

Inactive Publication Date: 2012-11-07
宁波箭蚁智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: the router running the OSPF protocol is on the broadcast network or NBMA network, and in the GR process, DR / BDR needs to synchronize links from all neighbors on the network State database information, DR Other needs to synchronize the link state database information from the DR and BDR on the network, the router will synchronize a lot of repeated information, resulting in prolonged adjacency establishment time, low efficiency, and longer GR time

Method used

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  • Information synchronizing method, device and system of link state database of GR (Graceful Restart) scene
  • Information synchronizing method, device and system of link state database of GR (Graceful Restart) scene
  • Information synchronizing method, device and system of link state database of GR (Graceful Restart) scene

Examples

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Embodiment 1

[0020] like figure 1 As shown, it is a flowchart of a method for synchronizing link state database information in a GR scenario according to an embodiment of the present invention, and the method includes:

[0021] 101. Determine the access role when the router running the OSPF protocol accesses the network and GR occurs.

[0022] Optionally, the aforementioned access role is one of the following: a selective router (DR), a backup selective router (BDR), and a router other than the DR and the BDR (DR Other). The aforementioned network may be one of the following: broadcast network, non-broadcast multi-access network NBMA network.

[0023] 102. Select an adjacent corresponding router according to the determined access role.

[0024] Optionally, when the judged access role is DR, the selected adjacent corresponding router is BDR; when the judged access role is BDR, the selected adjacent corresponding router is DR; when the judged access role When it is DR Other, the selected ...

Embodiment 2

[0028] like figure 2 As shown, it is a flowchart of a method for synchronizing link state database information in a GR scenario according to an embodiment of the present invention, and the method includes:

[0029] 201. Determine the access role when the router running the OSPF protocol accesses the network and GR occurs.

[0030] Optionally, the above access role is one of the following: DR, BDR, DR Other. The aforementioned network may be one of the following: broadcast network, non-broadcast multi-access network NBMA network.

[0031] 202. Select an adjacent corresponding router according to the determined access role.

[0032] Optionally, when the judged access role is DR, the selected adjacent corresponding router is BDR; when the judged access role is BDR, the selected adjacent corresponding router is DR; when the judged access role When it is DR Other, the selected adjacent corresponding router is DR or BDR.

[0033] 203. Utilize the selected corresponding router t...

Embodiment 3

[0037] Corresponding to the above method embodiment, such as image 3 As shown, it is a schematic structural diagram of a device for synchronizing link state database information in a GR scenario according to an embodiment of the present invention. The device includes:

[0038] A role judging unit 301, configured to judge the access role when a router running the OSPF protocol accesses the network and GR occurs;

[0039] A router selection unit 302, configured to select an adjacent corresponding router according to the determined access role;

[0040] The information synchronization unit 303 is configured to use the selected corresponding router to perform link state database information synchronization.

[0041] like Figure 4 As shown, it is a schematic structural diagram of a link state database information synchronization device in another GR scenario according to an embodiment of the present invention. In addition to the above-mentioned role judgment unit 301, router se...

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Abstract

The embodiment of the invention provides information synchronizing method, device and system of a link state database of a GR (graceful restart) scene. The method comprises the following steps of: judging an access role when a router running an OSPF (Open Shortest Path First) protocol is accessed into a network and generates a GR; selecting an adjacent corresponding router according to the judgedaccess role; and carrying out the information synchronization of the link state database by utilizing the selected corresponding router. The device comprises a role judging unit, a router selecting unit and an information synchronizing unit, wherein the role judging unit is used for judging the access role when the router running the OSPF protocol is accessed into the network and generates the GR; the router selecting unit is used for selecting the adjacent corresponding router according to the judged access role; and the information synchronizing unit is used for carrying out the informationsynchronization of the link state database by utilizing the selected corresponding router. When the router for running the OSPF protocol of the embodiment of the invention carries out the GR, the GR time is reduced, and the efficiency is improved.

Description

technical field [0001] The present invention relates to the field of network technologies, in particular to a method, device and system for synchronizing link state database information in a GR scenario (Graceful Restart, smooth restart). Background technique [0002] GR (Graceful Restart) mainly implements the ability to ensure normal data forwarding when the routing protocol is restarted, so as to ensure that key services are not interrupted. The GR technology is a kind of HA (High Availability, high reliability) technology. HA is a set of comprehensive technologies, mainly including redundant fault tolerance, link guarantee, node failure repair and traffic engineering. GR is a redundant fault-tolerant technology, which has been widely used in active-standby switchover and system upgrade to ensure uninterrupted forwarding of key services. [0003] A router running OSPF (Open Shortest Path First) protocol needs to synchronize link state database information from all neigh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L12/28
Inventor 傅超王军
Owner 宁波箭蚁智能科技有限公司