MappleCare Community
Reply To: [Solved] How to fix Matter Accessory Showing ‘No Response’ in Apple Home App caused by IPv6 mDNS Multicast DNS routing failure between 2.4GHz Wi-Fi and Thread Border Router on Apple TV 4K
Find answers from other Apple users or start a discussion about your device.
Home › Forums › HomeKit, Apple TV & Smart Home › [Solved] How to fix Matter Accessory Showing ‘No Response’ in Apple Home App caused by IPv6 mDNS Multicast DNS routing failure between 2.4GHz Wi-Fi and Thread Border Router on Apple TV 4K › Reply To: [Solved] How to fix Matter Accessory Showing ‘No Response’ in Apple Home App caused by IPv6 mDNS Multicast DNS routing failure between 2.4GHz Wi-Fi and Thread Border Router on Apple TV 4K
Claire BennettEnabling IGMP snooping / multicast forwarding and rebooting primary Thread Border Router.
Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:
- In home router Wi-Fi settings, enable IGMP Snooping and disable ‘AP Isolation’.
- Power cycle your primary Thread Border Router (Apple TV 4K connected via Gigabit Ethernet).
- Power-cycle the unresponsive Matter accessory for 10 seconds to prompt a fresh Thread mesh re-route.
Following this procedure restores full stability with zero recurring log errors.