METHOD AND SYSTEM FOR REALIZING HOT STANDBY IN CENTRALIZED NETWORK NODES

摘要

The present invention discloses a method for realizing hot standby in centralized network nodes. A main control module and a backup control module are set in a network node. A Resource Reservation Protocol-Traffic Engineering (RSVP-TE) tunnel is established for services, the RSVP-TE tunnel containing two Label Switched Paths (LSPs): one is the main LSP, the other is the backup LSP. The method includes: the main control module obtains the control information of the main LSP and the backup LSP, sets the identification information of the control information of the main LSP and the control information of the backup LSP as active or inactive according to the current states of the main LSP and the backup LSP, and synchronizes the control information of the main LSP and the control information of the backup LSP to the backup control module; after the switch of the main control module and the backup control module is performed, the current main control module generates the forwarding information according to the control information of LSP which identification information is "active", and forwards the service. The present invention also discloses a system for realizing said method. The present invention decreases the switch time and forwarding time, and improves the service forwarding rate.