The default-ip-address command configures the default-multicast address bound to a BFD session.
The undo default-ip-address command restores the default value.
| Parameter | Description | Value |
|---|---|---|
| ip-address | Specifies the default-multicast address. | It ranges from 224.0.0.107 to 224.0.0.250. |
If the peer IP address cannot be specified (certain peer is not assigned an IP address, such as the member link of Eth-Trunk) when BFD is enabled to detect the physical status of a link, bind a multicast address to the BFD session. BFD control packets are then sent to this multicast address.
You must change the multicast address in the following situations:
The multicast address is used by other protocol running in the network.
If more than one BFD sessions exist on the detection link, for example, the routed interfaces are connected through a switch enabled with BFD, you need to configure different default-multicast addresses for each device. This ensures that BFD packets can be correctly forwarded.
If the BFD session adopting a multicast address has been configured, you cannot change the multicast address.
By default, the default-multicast address is 224.0.0.184.