System and method for non-stop routing during switching of main and standby disks of control plane

Abstract

The invention discloses a system and method for non-stop routing during the switching of the main and standby disks of a control plane, and relates to the technical field of communication, and the method comprises the stepsthat the main disk stores the related information of a socket in a first socket proxy module when operating the socket, and then synchronizes the stored socket information to asecond socket proxy module; after receiving the socket information, the second socket proxy module stores the socket information and calls a TCP/IP module interface of the standby disk to obtain a corresponding socket; when the main disk and the standby disk are switched, the second socket proxy module traverses locally stored socket information to replace a standby disk protocol module to providekeep-alive messages of protocols corresponding to sockets; and after the switching between the main disk and the standby disk is completed, the socket proxy module stops replacing the standby disk protocol module to provide the keep-alive message. According to the method, the connection state between the standby disk and the neighbor equipment node protocol module can be kept uninterruptible in the lifting process of the standby disk, and non-stop routing is realized.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a system and method for uninterrupted routing during master and backup disk switching of a control plane. Background technique [0002] For carrier-class routers, non-stop routing technology (NSR, Non-Stop Routing) is one of the core technologies to achieve five nines or more reliability, and non-stop routing technology is a threshold-level requirement related to the reliability of high-end routers. Compared with non-high-availability or standardized NSF (Non-Stop Forwarding, non-stop forwarding) technology, NSR can confine network failures to nodes, and ensure that the data plane does not experience traffic interruption when the control plane fails. Higher reliability; and compared with NSF technology, its deployment environment requirements are lower, and it does not require the cooperation of neighboring nodes. [0003] In general, in order to achieve uninterrupted rou...

AI Technical Summary

Problems solved by technology

Depending on the control plane protocol stack used, the upgrade process from the standby disk to the successful sending of keep-alive messages may take seconds or even minutes.

[0004] In particular, in the routing device in the application scenario where the backup disk program is inactive or partially activated, that is, the backup disk module only has the data synchronization function with the active disk module, and the state machine of the protocol module does not migrate normally , the upgrade process may take more than ten minutes. During this time period, the standby disk protocol module does not have the ability to create and send messages, and cannot send keep-alive messages.

Since the keep-alive time of the keep-alive packets in common protocol modules is generally within 1 minute, if the keep-alive time is exceeded, the protocol status between the data plane and neighboring device nodes will become DOWN, which will cause the data plane routing to be withdrawn, resulting in traffic Emergence of severe consequences of disruption

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