nat64 mtu

Function

The nat64 mtu command configures the maximum transmission unit (MTU) value of IPv6 packets sent by interfaces in a NAT64 instance.

The undo nat64 mtu command restores the default configuration.

By default, the MTU value of IPv6 packets sent by interfaces in a NAT64 instance is 1500 bytes.

This command is supported only on the NetEngine 8000 F1A.

Format

nat64 mtu value

undo nat64 mtu [ value ]

Parameters

Parameter	Description	Value
value	Specifies the MTU value of IPv6 packets sent by interfaces in a NAT64 instance.	The value is an integer in the range of 1280 to 9600, in bytes. The default value is 1500.

Parameter

Description

Value

value

Specifies the MTU value of IPv6 packets sent by interfaces in a NAT64 instance.

The value is an integer in the range of 1280 to 9600, in bytes. The default value is 1500.

Views

NAT64 instance view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
nat	write

Usage Guidelines

Usage Scenario

When the link MTU is small, NAT64 packet fragments may be generated. You can change the MTU value so that the packets for NAT64 are not fragmented, improving NAT64 translation efficiency.

Precautions

If the size of packets is greater than the configured MTU value, the packets are broken into a great number of fragments.
If the MTU is set too large, packets may be transmitted at a low speed.

Example

# Set the MTU value of IPv6 packets sent by interfaces in a NAT64 instance named nat1 to 9600 bytes.

<HUAWEI> system-view
[~HUAWEI] nat64 instance nat1 id 1
[*HUAWEI-nat64-instance-nat1] nat64 mtu 9600