Although this task is similar to the previous task, its importance makes it necessary to present as part of
the tasks required for traffic engineering on Cisco IOS XR software.
Note
Before You Begin
The following prerequisites are required to protect MPLS-TE tunnels:
•
You must have a router ID for the neighboring router.
•
Stable router ID is required at either end of the link to ensure that the link is successful. If you do not
assign a router ID to the routers, the system defaults to the global router ID. Default router IDs are subject
to change, which can result in an unstable link.
•
You must first configure a primary tunnel.
SUMMARY STEPS
1.
configure
2.
interface tunnel-te tunnel-id
3.
fast-reroute
4.
exit
5.
mpls traffic-eng
6.
interface type interface-path-id
7.
backup-path tunnel-te tunnel-number
8.
exit
9.
exit
10.
interface tunnel-te tunnel-id
11.
backup-bw {backup bandwidth | sub-pool {bandwidth | unlimited} | global-pool {bandwidth | unlimited}
}
12.
ipv4 unnumbered type interface-path-id
13.
path-option preference-priority {explicit name explicit-path-name}
14.
destination ip-address
15.
Use the commit or end command.
16.
(Optional) show mpls traffic-eng tunnels backup
17.
(Optional) show mpls traffic-eng tunnels protection frr
18.
(Optional) show mpls traffic-eng fast-reroute database
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
221
Implementing MPLS Traffic Engineering
Protecting MPLS Tunnels with Fast Reroute
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