Can I make and isolated replica subnet with access to gateway?

[banksiaboy]

Hi all,

I'm new at this... I am transitioning from a dumb ISP router/WAP system to something more interesting.

My current home network is all on the 192.168.0.0/24 network segment.

I have OPNsense 23.7.10 running in a vm on Proxmox pve-manager/8.1.3. It is not yet my firewall/router
In Proxmox I have an Ubuntu cloud vm running mbentley/docker-omada-controller.
All on the same network segment.

I started the controller and connected my new TL-SG2016P switch. The controller adopted the switch ok.

Then I began having problems with my iPhone 12 Pro - Every time I bring the Omada controller up - it knocks the iPhone off the network. Very repeatable. My iPad Air 4 unaffected.

Is it feasible to create a network bridge on Proxmox, connected to a spare nic. Attach the virtual nic on my Omada controller vm to that bridge, plug the switch into that bridge/nic only, and use OPNsense to act as DHCP server for that bridge, creating a replica 192.168.0.1/24 subnet with access to my home gateway on 192.168.0.1 - or the OPNsense WAN. Thereby isolating the Omada gear my home network - so I can explore configuring the Omada stuff safely?
Eventually I expect to have a separate control VLAN for the Omada stuff - but I'm not there yet. I just need a safe play-space.

I have had a few tries and have assigned the bridge with the nic attached to OPNsense - but am lost at making an isolated replica network segment with access to the gateway/WAN - and the internet.

Cheers...