mpls ip propagate-ttl
Syntax
[ no | default ] mpls ip propagate-ttl [ forwarded | local ]
Release Information
Command introduced before JunosE Release 7.1.0.
Description
Controls the value for the TTL field in the MPLS header at the tunnel ingress 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
no
version changes the TTL processing model from the default uniform model to the pipe
model.
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.
Options
forwarded—Reveals the network structure to traceroute for forwarded packets; when
used with the
no
version, hides the network structure from traceroute only for local
•
packets, enabling you to hide the structure of the MPLS network from your customers,
and sets the tunnel model to pipe for forwarded packets
•
local—Reveals the network structure to traceroute for local packets; when used with
the
no
version, hides the network structure from traceroute only for local packets, sets
the tunnel model to pipe for locally originated packets, and sets the tunnel model to
pipe for locally originated packets
Mode
Global Configuration
Copyright © 2010, Juniper Networks, Inc.
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