Configuring The Time-To-Live Propagation In Hierarchical Mpls - Cisco CRS Configuration Manual

Implementing MPLS Forwarding

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
Command or Action
Step 1
configure
Example:
RP/0/RP0/CPU0:router# configure
Step 2 mpls ip-ttl-propagate disable [
forwarded | local ]
Example:
RP/0/RP0/CPU0:router(config)# mpls
ip-ttl-propagate disable forwarded
Step 3
Use the commit or end command.
Related Topics
Time-to-Live Propagation in Hierarchical MPLS, on page 158
Configuring the Time-to-Live Propagation in Hierarchical MPLS
Purpose
Enters global configuration mode.
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.
forwarded
Prevents the traceroute command from showing the hops for the
forwarded packets.
local
Prevents the traceroute command from showing the hops only for
local packets.
commit—Saves the configuration changes and remains within the
configuration session.
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.
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
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