PurposeCommand or Action
Enters MPLS-TE configuration mode.mpls traffic-eng
Example:
RP/0/RP0/CPU0:router(config)# mpls traffic-eng
Step 2
Enables traffic engineering on a specific
interface on the originating node.
interface type interface-path-id
Example:
RP/0/RP0/CPU0:router(config-mpls-te)# interface POS 0/6/0/0
Step 3
Enables the creation of dynamic NHOP
backup tunnels. By default, both NHOP and
NNHOP protection are enabled.
auto-tunnel backup nhop-only
Example:
RP/0/RP0/CPU0:router(config-mpls-te-if)# auto-tunnel backup
nhop-only
Step 4
Using this nhop-only option, only
link protection is provided.
Note
Enables the exclusion of SRLG values on a
given link for the AutoTunnel backup
associated with a given interface.
auto-tunnel backup exclude srlg [preferred]
Example:
RP/0/RP0/CPU0:router(config-mpls-te-if)# auto-tunnel backup exclude
srlg preferred
Step 5
The preferred option allows the AutoTunnel
Backup tunnels to come up even if no path
excluding all SRLG is found.
Configures attribute-set template for
auto-tunnel backup tunnels.
attribute-set attribute-set-name
Example:
RP/0/RP0/CPU0:router(config-mpls-te-if-auto-backup)#attribute-set
ab
Step 6
commit—Saves the configuration changes
and remains within the configuration
session.
Use the commit or end command.
Step 7
end—Prompts user to take one of these
actions:
• Yes— Saves configuration changes
and exits the configuration session.
• No—Exits the configuration session
without committing the configuration
changes.
• Cancel—Remains in the configuration
session, without committing the
configuration changes.
Displays information about configured
NHOP tunnels and SRLG information.
show mpls traffic-eng tunnels number detail
Example:
RP/0/RP0/CPU0:router# show mpls traffic-eng tunnels 1 detail
Step 8
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
230
Implementing MPLS Traffic Engineering
Establishing Next-Hop Tunnels with Link Protection
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