3Com S7902E Command Reference Manual - page 1582
1-50
Use the
undo ttl expiration pop
command to specify that ICMP responses travel along the LSP when
the TTL of an MPLS packet expires.
By default, ICMP responses of an MPLS packet with a one-level label stack travel along the IP route.
Note that configuring the
undo mpls
command will remove the configurations of the
ttl expiration pop
command.
Related commands:
ttl propagate
.
Examples
# Specify that ICMP responses travel along the LSP when the TTL of an MPLS packet expires.
[Sysname] mpls
[Sysname-mpls] undo ttl expiration pop
ttl propagate
Syntax
ttl propagate
{
public
|
vpn
}
undo ttl propagate
{
public
|
vpn
}
View
MPLS view
Default Level
2: System level
Parameters
public
: Specifies public network packets.
vpn
: Specifies VPN packets.
Description
Use the
ttl propagate
command to enable MPLS IP TTL propagation for public network packets or VPN
packets.
Use the
undo ttl propagate
command to disable the function.
By default, MPLS IP TTL propagation is enabled for only public network packets.
Related commands:
ttl expiration pop
.
Examples
# Enable MPLS IP TTL propagation for VPN packets.
[Sysname] mpls
[Sysname-mpls] ttl propagate vpn