Enabling Soft-Preemption On A Tunnel - Cisco ASR 9000 Series Configuration Manual

Implementing MPLS Traffic Engineering
Related Topics
Soft-Preemption, on page 150

Enabling Soft-Preemption on a Tunnel

Perform this task to enable the soft-preemption feature on a MPLS TE tunnel. By default, this feature is
disabled. It has to be explicitly enabled.
SUMMARY STEPS
1. configure
2. interface tunnel-te tunnel-id
3. soft-preemption
4. Use the commit or end command.
DETAILED STEPS
Command or Action
Step 1
configure
Example:
RP/0/RSP0/CPU0:router# configure
Step 2
interface tunnel-te tunnel-id
Example:
RP/0/RSP0/CPU0:router# interface
tunnel-te 10
Step 3 soft-preemption
Example:
RP/0/RSP0/CPU0:router(config-if)#
soft-preemption
OL-28381-02
Purpose
Enters global configuration mode.
Configures an MPLS-TE tunnel interface.
Enables soft-preemption on a tunnel.
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
Note
interface tunnel-gte configuration modes.
Cisco ASR 9000 Series Aggregation Services Router MPLS Configuration Guide, Release 4.3.x
Enabling Soft-Preemption on a Tunnel
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