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I can do that.
But when I have one hosts that should provide services in both VLANs, it's just extra complicated.
I have to define a lot of firewall rules.
It is slower.
Functions based on broadcasts are not working anymore.

In my case, just give home assistant 2 interfaces is much easier and I don't see any disadvante here.

/Edit: It looks like it is possible to use the sam MAC for severyl host entries. There is no way to define a VLAN in the hosts tab. Somehow, it is assigned the right way but I'm not sure of this is just luck or if dnsmasq gets the missing vlan information with the dhcp range which is defined indivudally for every VLAN.

Hello

I want to reconfigure my network at home. So far, I used a standard router from my provider.
Now I want to switch to a more complex setup with proxmox and opensense 25.7.3 as router.
I want to isolate specific parts, e.g. home automation. For this I use VLANs.
Some clients are members in several VLANs. It's easier for me to setup when it's about discovery and permissions.

The basic setup is working. I was able to configure everything, the nets are up and running.

I have some issues with dnsmasq hosts configuration.
Some clients use the same MAC in all VLANs. Technical that is no problem because the are isolated.
The clients get an IP in very VLAN.
In hosts configuration, there is only the MAC as identifier. There is no VLAN option meaning I can only define an individual configuration for one VLAN of the client.

How can I configure every interface of the client when the same MAC is used in different VLANs?

Thank you very much.