(Optional) Setting the DR Priority for an OSPF Interface of the Broadcast or NBMA Network Type
Procedure
- Run system-view
The system view is displayed.
- Run interface interface-type interface-number
The OSPF interface view is displayed.
- 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.
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.
- Run ospf dr-priority priority
The DR priority of the OSPF interface is set. A larger value indicates a higher priority.
By default, the DR priority of an interface is 1.
- Run commit
The configuration is committed.
Follow-up Procedure
Restarting or shutting down an interface will interrupt the OSPF neighbor relationships between devices. Therefore, exercise caution when performing the operation.
Reconfiguring the DR priority for a device does not change the DR or BDR on the network where the device is deployed. The DR or BDR can be reelected using the following methods. This, however, will result in the interruption of OSPF adjacency relationships between devices. Therefore, the following methods are used only when necessary.
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Restart the OSPF processes on all switches.
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Run the shutdown and then undo shutdown commands on interfaces where OSPF neighbor relationships are established.