The ospfv3 timer hello command specifies the interval for sending Hello packets on the interface instance.
The undo ospfv3 timer hello command restores the default interval.
By default, for the interface of the P2P and broadcast type, the interval for sending Hello packets is 10 seconds. For the interface of the P2MP and NBMA type, the interval for sending Hello packets is 30 seconds.
ospfv3 timer hello interval [ conservative ] [ instance instance-id ]
undo ospfv3 timer hello [ interval ] [ conservative ] [ instance instance-id ]
| Parameter | Description | Value |
|---|---|---|
| interval | Indicates the interval for an interface to send the Hello packets. | The value is an integer ranging from 1 to 65535. |
| conservative | Indicates the conservative mode of the dead timer. If the conservative mode is configured, the value configured for the dead timer using the ospfv3 timer dead command takes effect even when the value is less than 10s. | - |
| instance instance-id | Specifies the interface instance ID. | The value is an integer ranging from 0 to 255. By default, it is 0. |
Ethernet interface view, Ethernet sub-interface view, Eth-Trunk interface view, Eth-Trunk sub-interface view, Tunnel interface view, Dialer interface view, VLANIF interface view
Usage Scenario
Hello packets are periodically sent on OSPFv3 interfaces to establish and maintain neighbor relationships. A Hello packet contains information about timers, DRs, BDRs, and known neighbors.
The smaller the value of hello interval is, the faster the network topology changes and the more network resources are consumed. Ensure that the parameters of this interface and the adjacent devices are consistent.
Precautions
OSPFv3 cannot be configured on the Null interface.