(Optional) Preventing an Interface from Dynamically Setting Up a BFD Session

After the bfd all-interfaces enable command is run in an OSPFv3 process, the following situations occur:

On a P2P network, all OSPFv3 interfaces whose neighbor status is Up set up dynamic BFD sessions.
On a broadcast network, all OSPFv3 interfaces whose neighbor status is Up set up dynamic sessions between DRs and non-DRs.

To prevent certain interfaces from setting up dynamic BFD sessions, perform the following steps on the interfaces:

Run system-view
The system view is displayed.
Run interface interface-type interface-number
The interface view is displayed.
(Optional) 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.

Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support switching between Layer 2 and Layer 3 modes.
Run ospfv3 bfd block
The interface is prevented from dynamically setting up BFD sessions.