This command adds a configured path to the specified RSVP-TE LSP. The LSP name parameter is a character string that is to be used to identify the LSP within the switch and must have been created previously. The LSP is not signaled until a path is added to the LSP. Up to three paths can be defined for the LSP: one primary and two secondary. All paths are signaled, but only one path is used to forward traffic at any one time. The switch chooses the local MPLS VLAN interface from which to signal the LSP. To force an LSP to use a specific local MPLS interface, configure the peer‘s interface IP address as the first ERO in the associated path. The profile name is optional. If omitted, the default profile is applied to the LSP. The path name can be specified or the LSP can be configured to take any path. For a given LSP, only one path can be configured to take any path through the MPLS network.
The specified path defaults to primary when no primary path has been configured for the LSP and defaults to secondary if the primary path has been previously configured for the LSP.
Each path_name added to an lsp_name must be unique, but a path_name can be associated with multiple LSP names.
All configured primary and secondary paths for the lsp_name must have the same endpoint IP address. For example, three paths can be configured for the lsp_name, but all paths should represent different topological paths through the network to the same LSP endpoint.
Adding a secondary path_name designates a path as a hot-standby redundant path, used in the event that the primary or the other secondary path cannot be established or fails. Provided the path_name has not already been established, all paths are signaled as soon as they are associated with an lsp_name. If the primary path_name fails, is not configured, or cannot be established after the specified LSP retry-timeout, one of the configured secondary paths becomes the active path for lsp_name. All of the secondary paths have equal preference; the first one available is chosen. If at any time the primary path is reestablished, lsp_name immediately switches to using the primary path. If a secondary path fails while in use, the remaining configured secondary path can become the active path for lsp_name.
When you issue this command, the LSP associated with the path is immediately torn down. If the deleted path represents the in-use LSP for lsp_name and another secondary path is configured, the LSP immediately fails over to an alternate LSP. Because at least one path must be defined for each LSP, the last configured path cannot be deleted from the LSP.