Ttl Expiration Enable; Ttl Expiration Pop - H3C S5820X Series Command Reference Manual

Examples
# Locate errors along the LSP to 3.3.3.9/32.
<Sysname> tracert lsp ipv4 3.3.3.9 32
LSP Trace Route FEC: IPV4 PREFIX 3.3.3.9/32 , press CTRL_C to break.
TTL Replier
0
1 10.4.5.1
2 100.1.4.2
3 100.1.2.1

ttl expiration enable

Use ttl expiration enable to enable the device to send back an ICMP TTL exceeded message when it
receives an MPLS TTL expired packet.
Use undo ttl expiration enable to disable sending back of ICMP TTL exceeded messages for MPLS TTL
expired messages.
Syntax
ttl expiration enable
undo ttl expiration enable
Default
This function is enabled.
Views
MPLS view
Default command level
2: System level
Examples
# Disable the system from sending back an ICMP TTL exceeded message when it receives an MPLS TTL
expired message.
<Sysname> system-view
[Sysname] mpls
[Sysname-mpls] undo ttl expiration enable
Related commands

ttl expiration pop

ttl expiration pop
Use ttl expiration pop to configure the system to use IP routes to send back the ICMP TTL exceeded
messages for TTL-expired MPLS packets that have only one level of label.
Use undo ttl expiration pop to configure the system to use LSPs to send back the ICMP TTL exceeded
messages for TTL-expired MPLS packets that have only one level of label.
Syntax
ttl expiration pop
Time Type Downstream
Ingress 10.4.5.1/[1025]
1 Transit 100.3.4.1/[1024]
63 Transit 100.1.2.1/[3]
129 Egress
109