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Configuration Guide - IP Unicast Routing

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of IP Unicast Routing, including IP Routing, Static Route, RIP, RIPng, OSPF, OSPFv3, IPv4 IS-IS, IPv6 IS-IS, BGP, Routing Policy, and PBR.
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Configuring DR Priority of an Interface

Configuring DR Priority of an Interface

Context

The DR priority on a switch interface qualifies the interface for the DR election. If the DR priority is 0, the switch cannot be elected as a DR or BDR.

Do as follows on the switch that runs OSPFv3.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The interface view is displayed.

  3. 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.

    The mode switching function takes effect when the interface only has attribute configurations (for example, shutdown and description configurations). Alternatively, if configuration information supported by both Layer 2 and Layer 3 interfaces exists (for example, mode lacp and lacp system-id configurations), no configuration that is not supported after the working mode of the interface is switched can exist. If unsupported configurations exist on the interface, delete the configurations first and then run the undo portswitch command.

    NOTE:

    If many Ethernet interfaces need to be switched to Layer 3 mode, run the undo portswitch batch interface-type { interface-number1 [ to interface-number2 ] } &<1-10> command in the system view to switch these interfaces to Layer 3 mode in batches.

  4. Run ospfv3 dr-priority priority [ instance instance-id ]

    The DR priority of the interface is set.

  5. Run commit

    The configuration is committed.

Follow-up Procedure

After the DR priority is changed, you can re-elect a DR or BDR through the following methods, which, however, will result in the interruption of the OSPFv3 neighbor relationship between switches and therefore are used only when necessary.

  • Restarting all switches.

  • Running the shutdown and undo shutdown commands on the interface on which the OSPFv3 neighbor relationship is set up.

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Updated: 2019-04-20

Document ID: EDOC1100074760

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