Method and device for implementing LSP protection by IP RAN equipment
A technology for equipment and protection switching, applied in the direction of digital transmission systems, electrical components, transmission systems, etc., can solve problems such as long switching time, service interruption, and service interruption, and achieve the effect of reducing service interruption time
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[0052] Specific Example 1.
[0053] figure 1 It is a basic structural block diagram of an IP RAN device with a device for implementing LSP protection provided by the present invention, including a main control plane and a forwarding plane, and the two communicate through the inter-disk communication MTL (Message Transfer Link, message transfer link). Deliver the configuration.
[0054] The main control plane is responsible for generating sufficiently separated LSP protection groups and ensuring the number of LSPs in the protection groups <=2; At the same time, when both the primary and standby LSPs fail, an escape path is generated.
[0055] The main control plane sends the above configuration to the SPM module (service processing module) in the forwarding plane, and the SPM module calls the corresponding drive module to implement corresponding functions, such as performing protection switching operations or service recovery.
[0056] Such as figure 1 As shown, the main control plane ...
Example Embodiment
[0073] Specific Example 2.
[0074] Based on the above LSP protection device, the present invention also provides a method for IP RAN equipment to realize LSP protection,
[0075] Use the two hardware entries on the service processing module to store the main LSP and the standby LSP respectively, and obtain and calculate the hardware status and the switch flag of the service processing module according to the working status of the service processing module;
[0076] The automatic protection switching module uses the hardware status of the service processing module and the switching flag as the basis for performing the switching of the active LSP and the backup LSP or the basis for service recovery, and calls the switching drive module to perform corresponding protection switching or service recovery operations.
[0077] Such as figure 2 As shown, the above method specifically includes the following steps:
[0078] Step S10: In the event of a link failure or link recovery, the protocol ...
Example Embodiment
[0130] Specific Example 3.
[0131] In the solution of the present invention, when performing the protection switching and service recovery operations of the primary LSP and the backup LSP, the processing flow of the forwarding application layer is as follows:
[0132] For protection switching:
[0133] (1) After receiving the update operation of the LSP protection group, keep the ID of the FRR group unchanged (FRR, Fast Reroute, fast reroute).
[0134] (2) Obtain the switching status of the FRR group at this time from the switching drive module, and the switching status is Figure 3-Figure 8 The hardware status in, indicates that the first or second item of the hardware table entry for the business at this time. Note: At this time, the first item of the hardware table item may be the primary LSP or the standby LSP, and the corresponding second item may also be It will be the standby LSP or the primary LSP, and obtain the working LSP path information (LSP key value) according to the ...
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