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Configuration Guide - IP Unicast Routing

S7700 and S9700 V200R011C10

This document describes IP Unicast Routing configurations supported by the switch, including the principle and configuration procedures of IP Routing Overview, Static Route, RIP, RIPng, OSPF, OSPFv3, IS-IS(IPv4), IS-IS(IPv6), BGP, Routing Policy ,and PBR, and provides configuration examples.
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Configuring an Interface to Insert the Actual MTU into DD Packets

Configuring an Interface to Insert the Actual MTU into DD Packets

Context

After virtual links are created, devices from different vendors may use different default MTUs. To ensure consistency, the default MTU is set to 0 when the interface sends DD packets.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The OSPF interface view is displayed.

  3. (Optional) On an Ethernet interface, run undo portswitch

    The interface is switched to Layer 3 mode.

    By default, an Ethernet interface works in Layer 2 mode.

  4. Run ospf mtu-enable

    The interface is configured to insert the actual MTU into DD packets and check whether the MTU in DD packets from the neighbor exceeds the MTU of the local end.

    By default, the MTU in DD packets sent by an interface is 0.

    Performing this procedure causes the re-establishment of neighbor relationships.

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Updated: 2019-10-18

Document ID: EDOC1000178324

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