Hey Brendan,
On Wed, Jan 26, 2022 at 12:52 PM Brendan Doyle
wrote:
> Hi,
>
> So I have an underlay VIP that is reachable via a Gateway. The VIP moved
> to a new
> hypervisor after a simulated power failure (all hypervisors rebooted).
> When things came
> back OVN was resolving it to the wrong MAC address. When I looked in the
> MAC_binding
> table I saw that all entries for that address were wrong. I flushed the
> table and everything
> was fine (entries got updated with the correct MAC).
>
> So It seems to me that these entries must not be aged out? How is this
> supposed to work?
>
These entries do not age out. We discussed the topic a couple of other
times (eg. [0]) without a clear conclusion.
Also, we observed that in certain environments the size of this table can
increase to a point where the SB database starts to be huge (>1GB) mostly
due to the entries in this table.
To avoid this, we landed a patch in OpenStack recently that could be useful
for you [1].
[0] https://mail.openvswitch.org/pipermail/ovs-discuss/2019-June/048936.html
[1] https://review.opendev.org/c/openstack/neutron/+/813610
>
> Thanks
>
> Brendan.
>
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>
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