Configuring the Time-to-Live Propagation in Hierarchical MPLS
Perform this task to enable or disable the time-to-live (TTL) propagation for locally generated packets that
are independent of packets forwarded form a customer edge (CE) device.
SUMMARY STEPS
1.
configure
2.
mpls ip-ttl-propagate disable [ forwarded | local ]
3.
Use the commit or end command.
DETAILED STEPS
PurposeCommand or Action
Enters global configuration mode.configure
Example:
RP/0/RP0/CPU0:router# configure
Step 1
Stops the propagation of IP TTL to and from the MPLS header. The example
shows how to disable IP TTL propagation for forwarded MPLS packets.
mpls ip-ttl-propagate disable [
forwarded | local ]
Step 2
Example:
RP/0/RP0/CPU0:router(config)# mpls
forwarded
Prevents the traceroute command from showing the hops for the
forwarded packets.
ip-ttl-propagate disable forwarded
local
Prevents the traceroute command from showing the hops only for
local packets.
commit—Saves the configuration changes and remains within the
configuration session.
Use the commit or end command.
Step 3
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
Time-to-Live Propagation in Hierarchical MPLS, on page 158
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
159
Implementing MPLS Forwarding
Configuring the Time-to-Live Propagation in Hierarchical MPLS
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