R21xx-HP FlexFabric 11900 MPLS Command Reference

38
Predefined user roles
network-admin
Parameters
value: Specifies the MPLS MTU of the interface, in the range of 46 to 65535 bytes.
Usage guidelines
This command is effective only when MPLS is enabled on the interface.
If the MPLS MTU is larger than the interface MTU, data forwarding may fail.
Examples
# Set the MPLS MTU of interface VLAN-interface 2 to 1000 bytes.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] mpls enable
[Sysname-Vlan-interface2] mpls mtu 1000
Related commands
display mpls interface
mpls ttl expiration enable
Use mpls ttl expiration enable to enable sending of MPLS TTL-expired messages.
Use undo mpls ttl expiration enable to disable the function.
Syntax
mpls ttl expiration enable
undo mpls ttl expiration enable
Default
The MPLS TTL-expired messages sending function is enabled.
Views
System view
Predefined user roles
network-admin
Usage guidelines
The mpls ttl expiration enable command enables an LSR to generate an ICMP TTL-expired message upon
receiving an MPLS packet with TTL being 1. If the MPLS packet has only one label, the LSR sends the ICMP
TTL-expired message back to the source through IP routing. If the MPLS packet has multiple labels, the LSR
forwards the ICMP TTL-expired message along the LSP of the MPLS packet to the egress, which then sends
the message back to the source.
Examples
# Disable the MPLS TTL-expired messages sending function.
<Sysname> system-view
[Sysname] undo mpls ttl expiration enable