What are the precautions for configuring multicast BFD

The BFD packets sent in multicast mode are untagged.

When a port configured with multicast BFD receives tagged packets, it checks the tag of the packets. If the tag is different from the port's default VLAN ID, the port discards the packets.

To configure multicast BFD on an interface, run the port default vlan command to specify the default VLAN of the interface.

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