Method for ensuring graceful restarting and dual master control network device

A graceful restart, network equipment technology, applied in data exchange networks, digital transmission systems, electrical components, etc., can solve problems such as unusability, and achieve the effect of ensuring uninterrupted forwarding, shortening the sending time, and improving the success rate of graceful restarts

CN101827035AActive Publication Date: 2010-09-08MAIPU COMM TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2010-09-08

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Abstract

The invention aims at providing a method for ensuring graceful restarting and a dual master control network device for realizing the method, which can improve the graceful restarting success rate of a centralized-type dual master control network device. A graceful restarting proxy operates on a main-use master control board and a standby-use master control board of the dual master control networkdevice; under normal conditions, the graceful restarting proxy on the main-use master control board periodically synchronizes graceful restarting messages that are transmitted to all neighbor devicesthrough routing protocols to the standby-use master control board; and after main and standby switching is carried out, a graceful restarting proxy of a new main-use master control board transmits graceful restarting messages. After the main and standby switching of the dual master control device is carried out, the graceful restarting proxy directly transmits the graceful restarting messages to the neighbor devices without waiting for the operation of the routing protocols; therefore, the interval time for switching into the graceful restarting message transmitting is shortened.
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Description

technical field

[0001] The present invention relates to a communication technology of a centralized network device, in particular to a graceful restart (Graceful Restart, GR for short) technology of a centralized dual-master network device. Background technique

[0002] Routing and switching network devices are responsible for important tasks such as Internet traffic forwarding and routing forwarding in the Internet interconnection. In order to ensure the reliability of network devices, dual-master technology is usually used. In a dual-master network device, one main control board is in the active main control board state, and the other main control board is in the standby main control board state. The main main control board is responsible for managing the entire system, and the standby main control board monitors the status of the main main control board. When the active main control board is abnormal, the standby main control board immediately switches to the active mai...

Examples

Embodiment Construction

[0040] Such as figure 1 As shown, the dual-master network equipment includes the active main control board and the standby main control board. Both the active main control board and the standby main control board include routing protocol modules. Also includes GR agent module;

[0041] The routing protocol module in the master main control board is used to periodically send GR messages;

[0042] The GR agent module in the active main control board is used to intercept the GR message sent by the routing protocol module of the active main control board, and release the GR message after synchronizing the GR message to the standby main control board ;When the dual-master network device performs active-standby switchover, send the saved GR message to the neighbor device of the dual-master network device;

[0043] The GR agent module in the standby main control board is used to save the synchronized GR message.

[0044] The first main control board is the active main control boar...