Standby and secondary LSPs

Standby and secondary LSPs provide an alternate route in the event the primary route fails. The tunnel ID, from node, to node, and IP address of a secondary or standby LSP are identical to that of the primary LSP. However, secondary and standby LSPs have the following differences:

• A secondary LSP is not signaled until the primary LSP fails.
• A standby LSP is signaled regardless of the status of the primary LSP.