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AR500, AR510, and AR530 V200R007 Commands Reference

This document describes all the configuration commands of the device, including the command function, syntax, parameters, views, default level, usage guidelines, examples, and related commands.
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ipsec df-bit

ipsec df-bit

Function

The ipsec df-bit command sets the don't fragment (DF) flag bit on an IPSec tunnel or A2A VPN.

By default, the DF flag bit on an IPSec tunnel or A2A VPN is the flag bit of original packets.

Format

ipsec df-bit { clear | set | copy }

Parameters

Parameter

Description

Value

clear

Sets the DF flag bit to 0, indicating that IP packets can be fragmented.

-

set

Sets the DF flag bit to 1, indicating that IP packets cannot be fragmented.

-

copy

Uses the flag bit of original packets.

-

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

After an original packet is encapsulated, the packet length may exceed the MTU of the device outbound interface. To prevent packet loss, fragment the packets.

Precautions

If you run the ipsec df-bit command multiple times, only the latest configuration takes effect.

Example

# Set the DF flag bit to 0 on an IPSec tunnel or A2A VPN.

<Huawei> system-view
[Huawei] ipsec df-bit clear
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Updated: 2019-05-29

Document ID: EDOC1000097293

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