Matter over LAN not behaving when using SLZB-MR1U.

[tropic sleet]

So I just got a new SLZB-MR1U, I managed to set up Z2M correctly. But thread/matter keeps giving me problems. The credentials refuse to sync to my phone. Always showing this error.

I have researched this problem a bit and no I do not have any Apple HomePods that could be interfering. And due to the nature of my setup I can not plug it into my Home Assistant server directly via USB.

I am stuck, any help/tips are appreciated.

[tropic sleet]

Okay, I believe I’ve resolved the issue. UniFi doesn’t work well with separate VLANs, even though my phone has permission to communicate with my IoT VLAN. However, when I connected to the IoT WiFi, everything worked seamlessly. I’m curious if there’s a way to fix this problem in UniFi so that I don’t have to connect to my IoT WiFi every time.

[odd lantern]

You can selectively reflect mdns traffic between VLANs in the UniFi GUI under Settings, Networks, Gateway mDNS Proxy

One of the presets is “Matter Network”

[tropic sleet]

Thank you

[odd lantern]

Please let me know how it works out as I am not currently doing this with any Matter devices, but would like to

I can confirm it works well for ESPHome, HomeKit, etc though

[tropic sleet]

Made sure it was on

Still get this

Not when I’m on my IoT

I’ve looked through all my rules

Can’t find anything that would be problematic

[tawny gate]

for Matter/thread traffic may need to reflect ipv6 mDNS and few (if any) of the consumer/prosumer) routers seem do that that well enough for Matter yet at least not consistently for most users.

you won't find guides on how to do this for matter online, at least not reproducible ones for users.

[tropic sleet]

UniFi is more commercial grade so I’m sure there is a way to do that

[tawny gate]

Good luck ... several have tried. If you get it working and get a robust matter ecosystem please document the steps.