Backup Autotunnel Assignment - Cisco CRS Configuration Manual
Ios xr mpls configuration guide
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Also See for CRS:
- User manual (304 pages) ,
- Configuration manual (292 pages) ,
- Command reference manual (155 pages)
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MPLS Traffic Engineering
This figure illustrates node protection.
Figure 12: Node Protection
Backup AutoTunnel Assignment
At the head or mid points of a tunnel, the backup assignment finds an appropriate backup to protect a given
primary tunnel for FRR protection.
The backup assignment logic is performed differently based on the type of backup configured on the output
interface used by the primary tunnel. Configured backup types are:
• Static Backup
• AutoTunnel Backup
• No Backup (In this case no backup assignment is performed and the tunnels is unprotected.)
Note
Note
In order that the Backup AutoTunnel feature operates successfully, the following configuration must be applied
at global configuration level:
ipv4 unnumbered mpls traffic-eng Loopback 0
The Loopback 0 is used as router ID.
Note
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
170
Static backup and Backup AutoTunnel cannot exist together on the same interface or
link.
Node protection is always preferred over link protection in the Backup AutoTunnel
assignment.
Implementing MPLS Traffic Engineering
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