mpls path-mtu independent

Function

The mpls path-mtu independent command allows an MPLS MTU to take effect independently.

The undo mpls path-mtu independent command does not allow an MPLS MTU to take effect independently.

By default, this function is disabled.

mpls path-mtu independent

undo mpls path-mtu independent

None

MPLS view

2: Configuration level

Task Name	Operations
mpls-te	write

Usage Scenario

The MPLS MTU is determined using either of the following methods:

If an MPLS MTU configured using the mpls mtu command is not set on an interface, the interface MTU is used.
If both an MPLS MTU (configured using the mpls mtu command) and an interface MTU are configured on an interface, the smaller value between the two MTU is used.
The MPLS MTU is affected by the interface MTU and cannot take effect independently from the interface MTU. To allow an MPLS MTU (configured using the mpls mtu command) to take effect independently, run the mpls path-mtu independent command. This command is used when a Huawei device communicates with a non-Huawei device, which prevents low MPLS forwarding efficiency stemming from different MTU implementations.

Precautions

If no MPLS MTU is set using the mpls mtu command and an interface MTU is set on an interface, the interface MTU is used.

# Allow an MPLS MTU to take effect independently.

<HUAWEI> system-view
[~HUAWEI] mpls
[*HUAWEI-mpls] mpls path-mtu independent