Hi Jagadeesh, There is a standard for OSPF BFD strict-mode - https://datatracker.ietf.org/doc/rfc9355/ However, it is not supported by FRR yet . Thanks, Acee

On Jul 23, 2025, at 7:06 PM, Jagadeesh Banavara via dev <dev@lists.frrouting.org> wrote:

From: Jagadeesh Banavara <jbanavara@infoblox.com> Subject: OSPF Adjacency Behavior with BFD Shutdown State Date: July 23, 2025 at 7:06:38 PM EDT To: "dev@lists.frrouting.org" <dev@lists.frrouting.org>

Hi,

I’ve observed a behavior and wanted to check if there’s a recommended approach or configuration to address it.

When a BFD profile transitions to the shutdown state (admin down), it correctly brings down the OSPF adjacency. However, after a few seconds, the adjacency is re-established—even though the BFD session remains down. In contrast, BGP has a ‘strict' mode that prevents session establishment until the BFD session is up.

Is there a similar mechanism or means available in FRR to keep OSPF down as long as the associated BFD session is in the down state?

Any guidance or suggestions would be greatly appreciated.

Thanks, Jagadeesh

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