The primary point-to-multipoint LSP sends traffic to two or more branch LSPs carrying traffic to each of the egress provider edge (PE) routers. In the configuration for each of these branch LSPs, the point-to-multipoint LSP path name you specify must be identical to the path name configured for the primary point-to-multipoint LSP. See Configuring the Primary Point-to-Multipoint LSP for more information.
To associate a branch LSP with the primary point-to-multipoint LSP, specify the point-to-multipoint LSP name by including the p2mp statement:
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p2mp p2mp-lsp-name;
You can include this statement at the following hierarchy levels:
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Note: Any change in any of the branch LSPs of a point-to-multipoint LSP, either due to a user action or an automatic adjustment made by the router, causes the primary and branch LSPs to be resignaled. The new point-to-multipoint LSP is signaled first before the old path is taken down. |
The following sections describe how you can configure the branch LSP to be dynamically signaled using CSPF, as a static path, or as a combination of dynamic and static paths:
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