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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 34 MPLS Traffic Engineering - Fast Reroute Link Protection
How to Configure Traffic Engineering - Fast Reroute Link Protection
Configuring Backup Auto-Tunnels
To configure backup auto-tunnels, perform the following steps.
SUMMARY STEPS
1. enable
2. configure terminal
3. mpls traffic-eng auto-tunnel backup
4. mpls traffic-eng auto-tunnel backup nhop-only
5. mpls traffic-eng auto-tunnel backup tunnel-num [min num] [max num]
6. mpls traffic-eng auto-tunnel backup timers removal unused sec
7. mpls traffic-eng auto-tunnel backup config unnumbered-interface interface
DETAILED STEPS
Command Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Enters global configuration mode.
Step 3
mpls traffic-eng auto-tunnel backup
Example:
Router(config)# mpls traffic-eng
auto-tunnel backup
Builds next-hop (NHOP) and next-next hop (NNHOP) backup
tunnels automatically.
Step 4
mpls traffic-eng auto-tunnel backup
nhop-only
Example:
Router(config)# mpls traffic-eng
auto-tunnel backup nhop-only
Builds next-hop (NHOP) backup tunnels automatically.
Step 5
mpls traffic-eng auto-tunnel backup
tunnel-num [min
min-num
] [max
max-num
]
Example:
Router(config)# mpls traffic-eng
auto-tunnel backup tunnel-num min 3
max 400
Configures the range of tunnel interface numbers for backup
autotunnels.
• min-num—(Optional) Minimum number of the backup tunnels.
The range is 0 to 65535, with a default value of 65436.
• max-num—(Optional) Maximum number of the backup
tunnels. The max number is the minimum number plus 99. The
range is from 0 to 65535.