End-to-end Recovery
End-to-end recovery refers to an entire LSP from the source for an ingress router endpoint to the destination
for an egress router endpoint.
GMPLS Protection Requirements
The GMPLS protection requirements are specific to the protection scheme that is enabled at the data plane.
For example, SONET APS or MPLS-FRR are identified as the data level for GMPLS protection.
GMPLS Prerequisites
The following prerequisites are required to implement GMPLS on Cisco IOS XR software:
•
You must be in a user group associated with a task group that includes the proper task IDs for GMPLS
commands.
•
Router that runs Cisco IOS XR software.
•
Installation of the Cisco IOS XR softwaremini-image on the router.
Flexible Name-based Tunnel Constraints
MPLS-TE Flexible Name-based Tunnel Constraints provides a simplified and more flexible means of
configuring link attributes and path affinities to compute paths for MPLS-TE tunnels.
In the traditional TE scheme, links are configured with attribute-flags that are flooded with TE link-state
parameters using Interior Gateway Protocols (IGPs), such as Open Shortest Path First (OSPF).
MPLS-TE Flexible Name-based Tunnel Constraints lets you assign, or map, up to 32 color names for affinity
and attribute-flag attributes instead of 32-bit hexadecimal numbers. After mappings are defined, the attributes
can be referred to by the corresponding color name in the command-line interface (CLI). Furthermore, you
can define constraints using include, include-strict, exclude, and exclude-all arguments, where each statement
can contain up to 10 colors, and define include constraints in both loose and strict sense.
You can configure affinity constraints using attribute flags or the Flexible Name Based Tunnel Constraints
scheme; however, when configurations for both schemes exist, only the configuration pertaining to the
new scheme is applied.
Note
Related Topics
Assigning Color Names to Numeric Values, on page 268
Associating Affinity-Names with TE Links, on page 270
Associating Affinity Constraints for TE Tunnels, on page 271
Configure Flexible Name-based Tunnel Constraints: Example, on page 347
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
180
Implementing MPLS Traffic Engineering
Flexible Name-based Tunnel Constraints
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