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CLI-based Configuration Guide - IP Service

AR500, AR510, AR531, AR550, AR1500, and AR2500 V200R010

This document describes the concepts and configuration procedures of IP Service features on the device, and provides the configuration examples.
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Configuring an Outbound Interface to Fragment IP Packets

Configuring an Outbound Interface to Fragment IP Packets


During actual packet forwarding, the length of an IP packet may exceed the MTU value. Packets whose length exceeds the MTU value and the DF field is 1 are discarded. Therefore, IP packet fragmentation can be enabled so that the system sets the DF field of IP packets to 0 and fragments the packets. In this way, all IP packets can be forwarded.


  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The interface view is displayed.


    The function that clears the DF field is valid for outgoing packets; therefore, this function must be configured on the outbound interface.

  3. Run clear ip df

    The IP packet fragmentation is enabled on an outbound interface.

    By default, an outbound interface does not fragment IP packets.

Updated: 2019-05-20

Document ID: EDOC1100034231

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