[FROG] looking for expert opinion on whether this is normal

[Donald Sharp]

Something is deleting and then re-adding back the ip address assigned to
the interface that 10.10.205.4/32 is applied to.  You should be able to see
that with a `ip monitor address`.  There is nothing in FRR that does this
type of activity so I cannot guess as to what is causing this to happen.

donald

On Fri, Jul 5, 2024 at 3:37 PM Ian Veach <iveach at nshe.nevada.edu> wrote:

>
>
> We’re tracking down something that might be an issue – we’re not sure.  We
> don’t normally run frr with all debug logging turned on, and don’t know if
> this behavior is normal or not (we don’t have much to compare it to).
>
>
>
> Every 30 seconds, with logging on, we see this in the logs (for each
> interface with route):
>
>
>
> 2024 Jul  5 11:31:41 hostredacted [daemon.debug] ospfd[960266]:
> [JZFS1-TNQFD] Zebra: interface services address delete 10.10.205.4/32
>
> 2024 Jul  5 11:31:41 hostredacted [daemon.debug] ospfd[960266]:
> [PH9HB-NQMHW] Zebra: interface services address add 10.10.205.4/32 vrf
> default id 0
>
>
>
> It seems like this is flapping the interface to us, but maybe it’s a
> normal part of frr internals to do so?  Is this normal for frr to delete
> and add the interface every 30 seconds?
>
>
>
> Functionally, OSPF and our anycast DNS seems to be running ok.  But our
> monitoring has missed some pings (which could be explained with the
> interface delete/add).
>
>
>
> (this is on rhel9, frr-8.5.3-4, although I also get the same behavior when
> I downgrade to frr-8.3.1-11)
>
>
>
> Thank you for any input!
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