Olichops Posted August 22, 2023 Share Posted August 22, 2023 So I had a weird problem where my whole Unifi network went offline except for the Gateway. After reboot, one mini 5 port switch would not come online in the console page. rebooted that, it came online and crashed the whole network. Traced it to the Sony TV which was off and hard wired in. Plug that in and crashed the network. The TV wifi was off and after power cycle the TV all was good again. What would cause a single device like this to be able to bring the network down when it was behaving fine for years with no changes? Quote Link to comment Share on other sites More sharing options...
chopedogg88 Posted August 22, 2023 Share Posted August 22, 2023 no Sonos soundbar involved? Sonos can cause network loops that will bring down your network...haven't seen a Sony TV do this. Quote Link to comment Share on other sites More sharing options...
cnicholson Posted August 22, 2023 Share Posted August 22, 2023 That sounds odd. In concept, it should be impossible for a single bad device or port to crash the whole network. Was the "small switch" A USW Flex Mini? I have lots of those and they are second-class citizen devices that seem to be generally flaky (hey, for $25, what do you want?). Several of my mini's fail to show "online" (from a management console perspective) but they still function perfectly as dumb unmanaged switches, which is all I really want them to do. So I would not worry about that. I assume you have RSTP (on by default) left on. This would prevent loops in network that can saturate it (but still shouldn't hard crash it, I don't think). My Sony TVs have flaky network hardware that causes *them* to go offline, but I haven't observed them doing violence to the network, in general. I assume you already tried rebooting you primary UniFi gateway/router (Dream machine), which will trigger an auto rediscovery of your topology and network elements. I hope you get it resolved. Quote Link to comment Share on other sites More sharing options...
RAV Posted August 22, 2023 Share Posted August 22, 2023 It's the TV's NIC card. Rare, but not unheard of. Move to WiFi is recommended if it occurs. Could be an update, age, no one's really certain why some and not others have experienced it. (Not the driver, not Control4, something in the NIC hardware) Quote Link to comment Share on other sites More sharing options...
Olichops Posted August 22, 2023 Author Share Posted August 22, 2023 Yep a USW Flex Mini. Works fine until i pluged the TV in then every thing went to shit. Cold reboot of the TV fixed the issue and no new TV firmware was indicated. No Sonos Sound Bar. RSTP is on globally. Just a strange occurance that appears to be fixed for now Quote Link to comment Share on other sites More sharing options...
Olichops Posted August 26, 2023 Author Share Posted August 26, 2023 So spoke with the C4 Dealer and he sais he sees this all the time with Sony TVs. That is why they use the IR eye instead of the network cable. Good to know! Quote Link to comment Share on other sites More sharing options...
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