DETAILED STEPS
PurposeCommand or Action
Enters global configuration mode.configure
Example:
RP/0/RP0/CPU0:router# configure
Step 1
Configures an MPLS-TE tunnel interface.
interface tunnel-te tunnel-id
Example:
RP/0/RP0/CPU0:router# interface
tunnel-te 10
Step 2
Enables soft-preemption on a tunnel.soft-preemption
Step 3
Example:
RP/0/RP0/CPU0:router(config-if)#
soft-preemption
When soft preemption is enabled on a tunnel, these actions occur:
•
A path-modify message is sent for the current LSP with the soft preemption
desired property.
•
A path-modify message is sent for the reopt LSP with the soft preemption
desired property.
•
A path-modify message is sent for the path protection LSP with the soft
preemption desired property.
•
A path-modify message is sent for the current LSP in FRR active state with
the soft preemption desired property.
The soft-preemption is not available in the interface tunnel-mte and
interface tunnel-gte configuration modes.
Note
commit—Saves the configuration changes and remains within the configuration
session.
Use the commit or end command.
Step 4
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.
Related Topics
Soft-Preemption, on page 203
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
321
Implementing MPLS Traffic Engineering
Enabling Soft-Preemption on a Tunnel
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