Restrictions For Explicit Path Protection; Co-Existence Of Path Protection With Fast Reroute; Mpls-Te Automatic Bandwidth - Cisco ASR 9000 Series Configuration Manual
Aggregation services router mpls
Hide thumbs
Also See for ASR 9000 Series:
- Command reference manual (1138 pages) ,
- Routing configuration manual (702 pages) ,
- Reference manual (696 pages)
Table of Contents
Advertisement
Implementing MPLS Traffic Engineering
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
• Enhanced path protection is not supported.
Related Topics
Enabling Path Protection for an Interface, on page 202
Assigning a Dynamic Path Option to a Tunnel, on page 203
Forcing a Manual Switchover on a Path-Protected Tunnel, on page 204
Configuring the Delay the Tunnel Takes Before Reoptimization, on page 205
Configure Tunnels for Path Protection: Example, on page 258
Co-existence of Path Protection with Fast Reroute
Path protection and FRR can be configured on the same tunnel at the same time. The co-existence of path
protection and FRR on the same tunnel provides these benefits:
• Protection is expanded — having an FRR protected tunnel that is also path-protected ensures that failures
• Quick and effective re-optimization — having a pre-computed standby LSP allows the system to minimize
• Total time on backup is reduced — handling FRR failure using a path protection switch over reduces
MPLS-TE Automatic Bandwidth
The MPLS-TE automatic bandwidth feature measures the traffic in a tunnel and periodically adjusts the
signaled bandwidth for the tunnel.
These topics provide information about MPLS-TE automatic bandwidth:
OL-28381-02
identifier, because it is considered another path-option.
of non-protected links on the primary path are handled more efficiently by a quick switch-over to the
pre-signaled standby LSP.
re-optimization LSP path calculation and signaling, by simply switching over to the pre-signaled standby
LSP. Effectively, path protection switch over replaces the post-FRR LSP down event re-optimization.
total time on backup because the traffic is diverted from the backup to the standby, as soon as the head-end
receives the FRR LSP down notification, without having to wait for a re-optimization LSP.
Cisco ASR 9000 Series Aggregation Services Router MPLS Configuration Guide, Release 4.3.x
Co-existence of Path Protection with Fast Reroute
137
Advertisement
Table of Contents
