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Method for implementing link state database synchronization, router, circuit board and main control board

A link status and link status notification technology, which is applied in the communication field, can solve problems affecting NSR characteristics and complex solutions, and achieve the effects of message traffic reduction, LSDB synchronization, and simple LSDB synchronization

Active Publication Date: 2009-05-06
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] During the research and practice of the prior art, the inventor found that the prior art has the following problems: Although the above-mentioned prior art scheme can realize LSDB synchronization, this scheme is relatively complicated, for example, all processing of the LSA message needs to be All methods are coded and managed, and backups are required in all parts of the LSA message branch processing, and all changes to the LSA message processing, such as modifying the code, will affect the final realization of the characteristics of NSR

Method used

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  • Method for implementing link state database synchronization, router, circuit board and main control board
  • Method for implementing link state database synchronization, router, circuit board and main control board
  • Method for implementing link state database synchronization, router, circuit board and main control board

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Embodiment Construction

[0022] The embodiment of the present invention provides a method for realizing LSDB synchronization, which can realize LSDB synchronization relatively simply and has strong scalability.

[0023] When the OSPF protocol is running, there are designated router DR, backup designated router BDR and non-designated router DROther. DR and BDR need to be elected in the network. BDR is the backup of DR. Once DR fails, BDR will become DR, so that the network can continue to work. Compared with DR and BDR, other non-DR and non-BDR can be called DROther.

[0024] In the method of the embodiment of the present invention, AMB is regarded as DR, SMB is regarded as BDR, and LC is regarded as DROther, that is, AMB, SMB and LC inside the router are regarded as a single router, and they form a virtual neighbor relationship, Rely on the synchronization mechanism of the OSPF protocol to perform LSDB synchronization. At this time, DR and BDR do not need to be elected, and AMB can be directly regar...

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Abstract

The embodiment of the invention discloses a method for implementing link state database synchronization. The method comprises: receiving link state notifying message; comparing the link state notifying message with that in link state database, updating link state notifying message in the link state database if the received link state notifying message is new message, transmitting the received link state notifying message to virtual neighbor with established virtual neighbor relation. Accordingly, the embodiment of the invention provides a router including circuit board, master control board and standby master control bard. The embodiment of the invention also provides a circuit board and master control board. The embodiment of the invention can simply implement link state database synchronization.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for realizing link state database synchronization, a router, a circuit board and a main control board. Background technique [0002] The current high-end routers are characterized by the separation of control and forwarding. Generally speaking, the internal structure of routers can be divided into the active main control board AMB, the standby main control board SMB, and the line board LC. Both AMB and SMB belong to the control plane, and LC It belongs to the forwarding plane, and they are connected by switching network, please refer to figure 1 A schematic diagram of a router structure in the prior art. figure 1 Including routers A, B and C, the process of sending a message from router A to router C is: LC1 of router B receives the message sent from router A, such as a link state advertisement LSA message, and then finds out after checking the forwarding table T...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L1/22H04L1/16H04L7/04H04L12/02
CPCH04L45/021H04L45/02H04L45/586H04L45/03
Inventor 闫刚杨锋盛成
Owner HUAWEI TECH CO LTD
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