map tcp adjust-mss

Function

The map tcp adjust-mss command sets an MSS value used in the TCP three-way handshake.

The undo map tcp adjust-mss command restores the default MSS value used in the TCP three-way handshake.

By default, the MSS value used in the TCP three-way handshake is not modified.

This command is supported only on the NetEngine 8000 F1A.

Format

map tcp adjust-mss mss-value

undo map tcp adjust-mss [ mss-value ]

Parameters

Parameter	Description	Value
mss-value	Specifies the maximum length of packets to be sent without being fragmented.	The value is an integer ranging from 160 to 9540, in bytes.

Parameter

Description

Value

mss-value

Specifies the maximum length of packets to be sent without being fragmented.

The value is an integer ranging from 160 to 9540, in bytes.

Views

MAP-E instance view, MAP-T instance view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
map	write

Usage Guidelines

To set the TCP MSS value, run the map tcp adjust-mss command in a MAP instance view. After this command is run, the MAP-BR compares the configured MSS and the MSS field carried in a received TCP three-way handshake packet and selects a smaller one as an effective MSS value.

Example

# Create a MAP-T instance named test in the system view, access the MAP-T instance view, and set the TCP MSS value to 1400 bytes.

<HUAWEI> system-view
[~HUAWEI] map-t instance test id 111
[*HUAWEI-mapt-instance-test] map tcp adjust-mss 1400