Does G350 Support Matter Access via IPv6 Link-Local Address

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Symptoms:

  • The G350 and the Matter Hub are on the same local area network (LAN), Commissioned via Matter and joined the same Fabric.
  • When only the Hub is rebooted (while the camera remains powered on), the Hub sends a CASE Sigma1 request to the IPv6 link-local address fe80::…:5540, but receives no UDP response.
  • The G350’s mDNS advertises both IPv6 and IPv4 addresses simultaneously.
  • However, when the Hub switches to the IPv4 address 192.168.2.x:5540, it receives a Sigma2Resume response in about 4 ms.
  • The device appears to be online and functional; only the IPv6 communication path fails.
  • firmware version：4.5.20_0020.0017

Questions:

  1. Is the Matter UDP 5540 port on this specific model IPv4-only?
  2. If the device does not support IPv6 for the Matter protocol, should its mDNS stop advertising the IPv6 address?
  3. For controllers that prefer or prioritize IPv6 link-local addresses, is there an upcoming firmware fix or any troubleshooting guidance available?
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@yf448pm7d5 You seem to be experiencing an issue with G350 Matter communication over the IPv6 link-local (fe80::slight_smile: path on UDP 5540 after the controller hub reboots, while IPv4 continues to work.

The reference info I have here doesn’t confirm whether the G350’s Matter stack is IPv4-only vs dual-stack, nor does it mention any mDNS IPv6 advertising behavior or an upcoming firmware fix for this specific IPv6 link-local CASE handshake scenario. (It does note that Matter is built on IPv6 conceptually, but that doesn’t verify this device’s current behavior/firmware implementation.)

To get this properly diagnosed (and to check whether it’s a known firmware issue for 4.5.20_0020.0017), please contact support and include your packet capture/logs plus your network details (router model, IPv6/RA settings, VLANs, Wi‑Fi AP isolation, etc.):

Contact the Aqara Home App Customer Service Team (Profile> Help & Feedback > Customer Service) or scan the QR code:

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This will be more efficient. If you do not have an Aqara Home account, Please click here to create a ticket. Sorry for the inconvenience.