Hi,
I’d like to explain the issue as I understand it in the hope that it’s helpful to resolving the issue.
My current understanding of what’s happening
My ROCK/NUC boots successfully and remains alive locally on the HDMI screen. The black local ROCK screen continues to show the same Web UI address after the failure. However, after a short period, sometimes without any streaming/playback at all, the ROCK disappears from the network. Specifically:
- The ROCK is briefly visible after a push-button reboot
- It then disappears entirely from the Bell Giga Hub 2.0 connected-device list
- Once this happens, I cannot reach the ROCK Web UI by typing its displayed network address
- The local HDMI screen still appears alive and still shows the same Web UI address
- Roon Remote shows the spinning wheel and has reported “Uh oh, something’s not right. Make sure your Roon Server is turned on and that you’re connected to the same network.”
This occurs even when the ROCK is connected directly to the Bell Giga Hub 2.0, bypassing my Orbi system. So I do not think this is simply an Orbi mesh/backhaul issue.
Hardware / network context
ROCK running on a NUC. Roon OS 2.1 build 271 was shown on HDMI. I have Bell Canada 3 Gbps service. Router/modem is Bell Giga Hub 2.0 / Sagemcom FAST 5697. The Orbi 850 normally runs as access point to the Bell hub, but I have tested with Orbi bypassed. I also tried a PPPoE passthrough (but did not pursue as my enter network speed dropped very substantially).
Ethernet cables have been ruled out.
The Bell Giga Hub does not see the ROCK after the failure. It disappears entirely from the connected-device list. The ROCK appears locally alive over HDMI after the failure.
Things already tried:
- Push-button reboot of ROCK
- Replaced streamer
- Replaced the M.2 drive and flashed a fresh ROCK image. Roon OS reinstall. Updated the NUC BIOS. Restored my Roon archive/database after installing the new M.2
- Orbi reset
- Direct connection from ROCK to Bell Giga Hub 2.0, bypassing Orbi
- Plugging the ROCK and Streamer into a single Orbi satellite in an attempt to bypass Wi-Fi rooting of ROCK
- Using access point and PPPoE modes for Orbi
Additional point (noted in above posts). At one point, Roon appeared to point to: http://100.108.60.18 instead of the expected local 192.168.x.x address. However, I did not configure Tailscale on the new ROCK installation. So I am not assuming that Tailscale on ROCK is the cause, but I would like to understand whether this could reflect stale ARC/Tailscale state, controller-side VPN/Tailscale, restored configuration, cached server identity, or some other address-selection issue.
Router Logs
My router logs show IGMP and Multicast Blocks
The logs show the gateway aggressively stripping IGMP groups. Every time this happens, the Roon ROCK becomes completely invisible to the network:
-
23:29:36: IGMP group removed successfully
-
23:33:00: Multiple lines showing IGMP group removed successfully for streaming channels
It seems like the aggressive IGMP Snooping or multicast optimization designed to prioritize Bell Fibe TV boxes is accidentally blocking and suffocating Roon’s SSDP discovery traffic.
My guess
Given that (1) ROCK appears to remain alive locally over HDMI, (2) the Web UI becomes unreachable from the LAN, (3) the Bell Giga Hub drops the ROCK entirely from its connected-device list, (4) the issue occurs even without playback and (5) the issue occurs directly on the Bell hub with Orbi bypassed, I am wondering whether this is actually a ROCK host networking / Ethernet / NIC / DHCP / ARP / network-stack issue.
Questions for Roon Support (if they are helpful)
Logs / network interface
- Can you review my ROCK logs for Ethernet link drops, DHCP failures, interface resets, kernel NIC errors, or network-stack failures around the failure times?
- Do the logs show Roon Server crashing, or does the network interface disappear first?
ROCK HDMI display
- Does the ROCK HDMI screen continue to show the last-known Web UI address even if the Ethernet interface has dropped or become unreachable? In other words, could the HDMI screen still show the same IP even though the NIC is no longer reachable on the LAN?
At this stage, because the Bell Giga Hub completely loses sight of the ROCK while the ROCK appears to remain alive locally on HDMI, I’m leaning toward a network-interface or host-networking problem.
Please let me know what logs or diagnostics you need from me, whether there are specific tests you recommend, and if you have solutions to these problems.