On Thu, Oct 6, 2022 at 4:27 AM Michał Nasiadka <mnasia...@gmail.com> wrote:
>
> Hello,
>
> I’m running OpenStack Wallaby and using Ironic for Bare Metal provisioning.
> Neutron creates External ports for bare metal instances and uses 
> ha_chassis_group.
> Neutron normally defines a different priority for Routers LRP gateway chassis 
> and ha_chassis_group.
>
> I have a router with two VLANs attached - external (used for internet 
> connectivity - SNAT or DNAT/Floating IP) and internal VLAN network hosting 
> bare metal servers (and some Geneve networks for VMs).
>
> If an External port’s HA chassis group active chassis is different than 
> gateway chassis (external vlan network) active chassis - those bare metal 
> servers have intermittent network connectivity for any traffic going through 
> that router.
>
> Is that desired effect in OVN?

I think it would cause some issues.  I'm not able to exactly recall
why, but I've seen similar behavior and it is recommended that the
same controller which is actively handling the gateway traffic also
handles the external ports.  Maybe there is mac flapping of the router
port ips.
That could be the issue.  You can perhaps arp for the router ip from
your bare metal machine and see if you get 2 arp replies - one from
the controller which binds the external port and one from the gateway
chassis controller.

Thanks
Numan



>
> Best regards,
> Michal Nasiadka
>
>
>
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