Related Topics
Configure Tunnels for Path Protection: Example, on page 352
Restrictions for Path Protection
•
Only Point-to-Point (P2P) tunnels are supported.
•
Point-to-Multipoint (P2MP) TE tunnels are not supported.
•
A maximum of one standby LSP is supported.
•
There can be only one secondary path for each dynamic path option.
•
Explicit path option can be configured for the path protected TE with the secondary path option as
dynamic.
•
Do not use link and node protection with path protection on the headend router.
•
A maximum number of path protected tunnel TE heads is 2000.
•
A maximum number of TE tunnel heads is equal to 4000.
•
When path protection is enabled for a tunnel, and the primary label switched path (LSP) is not assigned
a backup tunnel, but the standby LSP is assigned fast-reroute (FRR), the MPLS TE FRR protected value
displayed is different from the Cisco express forwarding (CEF) fast-reroute value.
•
Inter-area is not supported for path protection.
Related Topics
Configure Tunnels for Path Protection: Example, on page 352
Restrictions for Explicit Path Protection
Explicit paths are used to create backup autotunnels. Explicit path protection provides a recovery mechanism
to protect explicit paths for MPLS-TE tunnels. These restrictions are listed to protect an explicit path:
•
Only one explicit protecting path is supported per path-option.
•
Link or node path diversity is not ensured for explicit protecting paths.
•
An explicit protecting path cannot protect a dynamic path option.
•
All options such as verbatim, lockdown are supported for the protecting path as long as it's explicit.
•
An explicit path cannot be protected by its own path option level.
•
An explicit path can be protected by a path option level that references the same explicit path name or
identifier, because it is considered another path-option.
•
Enhanced path protection is not supported.
Related Topics
Configure Tunnels for Path Protection: Example, on page 352
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
189
Implementing MPLS Traffic Engineering
Path Protection
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