JUNOSe 9.1.x Command Reference Guide A to M > M Commands > mpls ip propagate-ttl

mpls ip propagate-ttl

Description: 

Controls the value for the TTL field in the MPLS header when a label is assigned to an IP packet. Enabled by default, this command sets the TTL to the TTL value from the IP packet header. The no version sets the value to 255 to hide the network structure from all traffic, preventing the traceroute command from discovering and displaying LSP hops. The default version reverts to the global default, causing the TTL field to be copied from the IP packet header and enabling the traceroute command to show all the hops in the network.

Syntax: 

[ no | default ] mpls ip propagate-ttl [ forwarded | local ]

• forwarded—Hides the network structure from traceroute only for forwarded packets
• local—Hides the network structure from traceroute only for local packets

Mode(s): 

Global Configuration

    Release Information    Command introduced before JUNOSe Release 7.1.0.