Configuring Smart-discover
Context
Without Smart-discover being configured, when the neighbor status of a switch changes or the DR/BDR on a multi-access network (broadcast or NBMA network) changes, the switch does not send Hello packets to its neighbor until the Hello timer expires. This slows down the establishment of neighbor relationships between devices. After Smart-discover is configured, the switch can send Hello packets to its neighbor immediately without waiting for the expiration of the Hello timer. This speeds up the establishment of neighbor relationships and therefore implements fast convergence on OSPF networks.
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 smart-discover
Smart-discover is configured on the interface.
- Run commit
The configuration is committed.
