Cisco Cisco IOS Software Release 12.0(13)S7
MPLS Safe Label Reuse After Router Restart
How to Configure MPLS Safe Label Reuse Parameters
9
Cisco IOS Release 12.0(32)SY
DETAILED STEPS
Setting the MPLS Safe Label Reuse Timeouts
Perform the following tasks to set the MPLS safe label reuse timeouts:
•
•
You might want to change the timeout values to account for the rate at which neighbor routers in your
network update their forwarding tables to remove labels learned from the restarting router. For example:
network update their forwarding tables to remove labels learned from the restarting router. For example:
•
If all the neighbor routers are known to be able to detect the restart and to clear stale forwarding
information within 30 seconds, then you would want to reduce the timeouts accordingly.
information within 30 seconds, then you would want to reduce the timeouts accordingly.
•
If one of the neighbors is known to take 6 minutes to detect the restart and to clear stale forwarding
information, you would want to increase the timeout values.
information, you would want to increase the timeout values.
Setting the MPLS Safe Label Reuse Timeout When Persistent Data Is Found
Perform the following task to set the MPLS safe label reuse timeout when the router finds persistent data
that describes MPLS label usage.
that describes MPLS label usage.
SUMMARY STEPS
1.
enable
2.
configure terminal
Command or Action
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 label restart
Example:
Router(config)# mpls label restart
Enters mpls-label-restart configuration mode to configure
parameter settings that govern MPLS label usage following
a router restart.
parameter settings that govern MPLS label usage following
a router restart.
Step 4
no unsafe
Example:
Router(mpls-label-restart)# no unsafe
Enables the mechanism that prevents unsafe MPLS label
reuse after a router restart.
reuse after a router restart.
Step 5
end
Example:
Router(mpls-label-restart)# end
Exits to privileged EXEC mode.