Configuring MPLS MTU

MPLS inserts the label stack between the link layer header and network layer header of each packet. To make sure the size of MPLS labeled packets is smaller than the MTU of an interface, configure an MPLS MTU on the interface.

MPLS compares each MPLS packet against the interface MPLS MTU. When the packet exceeds the MPLS MTU:

To configure an MPLS MTU for an interface:

Step

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter interface view.

interface interface-type interface-number

N/A

3. Configure an MPLS MTU for the interface.

mpls mtu value

By default, no MPLS MTU is configured on an interface.

The following applies when an interface handles MPLS packets: