Cisco Cisco IOS XR Software Release 4.2

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Command Default
head backup: 9
head primary: 10
middle: 10
Command Modes
MPLS-TE configuration
Command History
Modification
Release
This command was introduced.
Release 4.2.4
Usage Guidelines
Use this command to change the priority given to TE labels when updates to the forwarding plane are made
from the control plane.
The priority values used by other applications are:
• 0 - Unused
• 1 - Unused
• 2 - RIB/LDP (Critical)
• 3 - Unused
• 4 - Unused
• 5 - RIB/LDP (High)
• 6 - Unused
• 7 - Unused
• 8 - RIB/LDP (Medium)
• 9 - TE backup tunnel head
• 10 - Other TE tunnels
• 11 - Unused (future TE use)
• 12 - Unused (future TE use)
The default prioritization of label updates from the control plane to the forwarding plane has been carefully
chosen to avoid traffic loss under both normal operation and high system load, and to balance the needs
of the various features that employ label switching. Changing these defaults may cause unpredictable
behavior including traffic loss, especially when the router is experiencing high load. Use of this command
is not recommended without proper understanding of its effects and possible side-effects.
Caution
   Release Notes for Cisco XR 12000 Series Router for Cisco IOS XR Software Release 4.2.4
38
OL-28268-01  
Release Notes for  Cisco XR 12000 Series Router for Cisco IOS XR Software Release 4.2.4
New Software Features on the Cisco XR 12000 Series Router