Matter over Wireless

[steady copper]

Hello everyone, hope you are all well.

I have Home Assistant OS running in a virtual machine in Proxmox.
I have Unifi networking including a Unifi Switch and Unifi Dream Machine Pro SE
I have IPv6 internal only as my ISP doesn't support IPv6.

I can ping between my PC using IPv6 and Home Assistant on its IPv6 address, (same VLAN).

I can add matter devices via my mobile using Google Homes to both my IOT wireless that is VLAN 2 and my default VLAN which is 1 so I know both networks matter over wireless works in general.

But adding a matter device via home assistant or adding it from Google Home to Home Assistant does not work.

I've tried it from VLAN 2 (HA is in VLAN1) knowing that is least like to work but tried any way and I also tried it in VLAN 1 and same result.

Is there any recommendations on what I can try or check etc. to attempt to get this working.

I am trying to pair Meross smart sockets (UK) - bought them as they were cheap enough to buy to use to configure and ensure Matter worked before trying to get Govee stuff etc. to work.

When trying to pair via Home Assistant in either VLAN it can see the device, get it to confirm connectivity etc. then fails on confirming connection to Home Assistant.

Any advice at all is apprechiated.

Thank you.

[tight sigil]

the posts i have seen about problems with ipv6 and matter have all involved running in a vm, so i suspect that is where you need to look.

[steady copper]

Hmm that is an interesting take, I might spin up a quick Raspberry Pi with it on as I have a spare Pi and either narrow it down to it being a VM or not.

If anyone else has another other suggestions that would be great, I'd love to compile a list of things to try for the weekend 🙂

And thank you @tight sigil for your reply.

[exotic ginkgo]

these are wifi matter devices then, not thread?

the specific things that home assistant needs to be able to talk to wifi matter devices is the ability to resolve their ip addresses via mDNS, and then the ability to actually route network packets to (and from) the device's reported ip address.

if the network interface for home assistant is on the same vlan as the wifi matter devices, then everything should work.

if it's on a different network, then you're in a not recommended network configuration, but you might be able to get it to work if you provide an mDNS repeater between networks, and ensure that you have two-way traffic routing between the ipv6 addresses reported by the matter devices and the ipv6 addresses used by home assistant.

[steady copper]

thank you @exotic ginkgo for the reply - see my responses in Italics. Thank you.

these are wifi matter devices then, not thread?
Yes they are matter over Wifi - I have bought a SLXB-MR3 for thread, and will be looking to migrate from my UZG-01 to this for Zigbee as well

the specific things that home assistant needs to be able to talk to wifi matter devices is the ability to resolve their ip addresses via mDNS, and then the ability to actually route network packets to (and from) the device's reported ip address.
Any troublshooting advice? I enabled IPv6 oan my windows box and was able to ping HA via IPv6 to prove some form of working IPv6

if the network interface for home assistant is on the same vlan as the wifi matter devices, then everything should work.
Intially they were not, it is in VLAN 1 and my IOT and these plugs were VLAN 2 but before messing about I tried the Matter device in VLAN 1 and it fails at the end when checking connection to Home Assistant

if it's on a different network, then you're in a not recommended network configuration, but you might be able to get it to work if you provide an mDNS repeater between networks, and ensure that you have two-way traffic routing between the ipv6 addresses reported by the matter devices and the ipv6 addresses used by home assistant.
Due to seeing a lot of issues with crossing vlans for MAtter I intend to move HA to the IOT VLAN but I've been testing with MAtter in the production VLAN

[steady copper]

I have been mucking around, turned off IGMP snooping and turned MDNS off (which made it worse so turned it back on).

The last result was I was able to get all the way to where Home Assistant asks if I want to add the Matter device after I've done all its connectivity stuff and when I click add it fails.

Screenshot

[steady copper]

I think I am hitting an utter brick wall with this now.

[steady copper]

I can connect use Google to commision the device but if I try Home Assistant I get the same as the above screenshot.

[exotic ginkgo]

hmm. so that means that your phone is able to talk to the matter device, but home assistant's matter server isn't able to.