Method and system for realizing hot backup in centralized network nodes

Abstract

The disclosure discloses a method for realizing hot backup in a centralized network node, in which a main control module and a standby control module are arranged, including: an Resource Reservation Protocol-Traffic Engineering (RSVP-TE) tunnel, which contains two Label Switched Paths (LSPs): a main LSP and a standby LSP, is established for services; and further including: the main control module acquires control information of the main LSP and that of the standby LSP, sets identification information of the control information of the main LSP and that of the standby LSP as Active or Inactive according to the current statuses of the main and standby LSPs, and synchronizes the control information of the main LSP and that of the standby LSP to the standby control module; and the current main control module generates forwarding information according to the control information of the LSP whose identification information is Active, and forwards a service after the switching between the main and standby control modules. The disclosure further discloses a system for realizing the method. The disclosure reduces the switching time and the forwarding time, and improves the service forwarding speed.

Description

technical field [0001] The present invention relates to the hot backup technology of Resource Reservation Protocol-Traffic Engineering (RSVP-TE, Resource Reservation Protocol-Traffic Engineering) service based on traffic engineering extension, in particular to a method and system for realizing hot backup in a centralized network node. Background technique [0002] As a supplementary protocol of Resource Reservation Protocol (RSVP, Resource Reservation Protocol), RSVP-TE is used to establish a label switching path for a Multi-Protocol Label Switching Protocol (MPLS, Multi-Protocol Label Switching) network. RSVP-TE is mainly used to support an instance of explicitly transmitting a Label Switched Path (LSP, Label Switched Path) with or without resource reservation. [0003] Hot backup (TE HOTSTANDBY) is an end-to-end protection mechanism for RSVP-TE tunnels. Corresponding to an RSVP-TE tunnel (TUNNEL), two LSPs will be formed, namely the active LSP and the backup LSP. When th...

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Problems solved by technology

Figure 4 It is a schematic diagram of the centralized network node structure, such as Figure 4 As shown, the centralized network node implements the functions of the main control processing unit (MPU, Management Processor Unit), routing processing unit (RPU, Routing Processor Unit), and NPC on the same CPU. Therefore, compared with distributed equipment The cost is low, and the overall software complexity is also low, but due to the characteristics of its single CPU work, the separation of control and forwarding cannot be achieved during hot backup

[0007] However, since the control information and forwarding information are concentrated in the same CPU, how to realize the hot backup in the current centralized network nodes, there is no related technical solution at present

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