System and method for performing virtual master-to-slave shift to keep TCP connection

A master-standby switchover and virtualization technology, applied in the field of virtualized master-standby switchover to maintain TCP connections, can solve problems such as serial number verification failure and window misalignment

Inactive Publication Date: 2015-12-02
FENGHUO COMM SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a fault occurs and the TCP connection is disconnected, and the TCP data fails to be synchronized to the standby master during the master-standby switchover, the sequence number verification will fail and the window will be dislocated.

Method used

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  • System and method for performing virtual master-to-slave shift to keep TCP connection
  • System and method for performing virtual master-to-slave shift to keep TCP connection

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] see figure 1 As shown, the embodiment of the present invention provides a virtualized active / standby switchover system for maintaining TCP connections, including an active main control board and a standby main control board. The active main control board and the standby main control board have the same structure and function. Both the active main control board and the standby main control board include a Hypervisor (virtual machine monitor) and a TCP backup and recovery module, and the Hypervisor includes a protocol control plane.

[0027] see figure 2 As shown, the embodiment of the present invention also provides a method for maintaining a TCP connection based on the virtualized active-standby switchover of the above-mentioned system, including the following steps:

[0028] S1. The active main control board and the standby...

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PUM

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Abstract

The invention discloses a system and a method for performing master-to-slave shift to keep TCP connection, and relates to the field of TCP connection. The system comprises a master main control board and a slave main control board, the master main control board and the slave main control board have the same structure and function, each of the master main control board and the slave main control board comprises a Hypervisor and a TCP backup and recovery module, and the Hypervisor comprises a protocol control plane. In normal operation, only the protocol control plane of the master main control board operates, and the system enters a backup state; and in the case of failure, the slave main control board works, and the system enters a recovery state: the protocol control plane of the slave main control board operates to obtain TCP data from the TCP backup and recovery module of the slave main control board, so as to correct a TCP window. The system can be used for backing up all TCP data and correcting the TCP window through the backup TCP data when performing the master-to-slave shift in the case of failure, and the TCP connection can be recovered to a normal window state to keep the TCP connection non-interrupted.

Description

technical field [0001] The present invention relates to the field of TCP (Transmission Control Protocol, transmission control protocol) connection, in particular to a system and method for virtualized active / standby switching and maintaining TCP connection. Background technique [0002] High reliability is an important function of network equipment. NSR (Non-StopRouting, non-stop routing) is the preferred technology for network equipment to achieve high reliability. The system control plane data of the main control board is hot-migrated to the standby main control board. When the main main control board fails, the main-standby switchover is automatically performed, and the standby main control board uses the hot-migrated data to take over the operation of the active main control board. In this way, the protocol control plane is not aware of system control plane failures. Its advantage is that it is a self-contained technology that does not require assistance from neighbors a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L29/06
CPCH04L41/0668H04L69/163
Inventor 魏吉星强小应宋保科付华楷杨小华刘程朱圣梁兰光华朱冰
Owner FENGHUO COMM SCI & TECH CO LTD
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