Platform version: 2.3.7.145
Hardware version: C-8
Power Supply: Using Provided Supply
Since I bought this Hubitat C8 in November 2023, I've noticed after a few days it becomes unreachable. I haven't really done much with it until December as I didn't have time. I kept running into this issue and have:
Reset the network settings
Reset the Hubitat restoring from a backup
Reset the Hubitat starting from scratch.
Eventually after a few days, the Hubitat crashes. I wasn't sure at first whether it was just the ethernet port stopping traffic or if the Hubitat crashed, but I'm sure now that it completely crashes as I have a plugin installed that outputs log messages pretty consistently and there was a clear gap in messages.
I'm currently looking at returning this because it is pretty unreliable as with no plugins or devices installed, I was still experiencing this behavior.
If it is green, can you verify there no devices on the same LAN as the hub that are using jumbo ethernet frames (JF)? JF are known to knock the hub offline.
I would also suggest opening a warranty claim so Hubitat engineers can check your hub's engineering logs.
I am using dd-wrt and I don't think jumbo frames are supported. I do have the MTU set to 1492. I guess if there is an easy way to be sure, I would try that out, but I don't know of any.
What kind of router/switch hardware is the hub plugged into?
There's also a genuine possibility that the C-8 you received is defective. So I would definitely encourage you to submit a warranty claim at the link I posted earlier.
While you're testing this could you make sure that no other devices are plugged into the router? And, I am going to suggest once again that you start that warranty claim. There's a reasonable likelihood that the C-8 you received is defective.
You may be looking in the wrong direction. Based on details you've provided, the problem might be on the network side, so no reset will solve the hub problem. Netgear switches are known to have problems auto negotiating the Ethernet speed link. Have you tried setting the hub to fixed 100mbps in Network Setup? That may help. Also check to see if jumbo frames are enabled in your network. Other than that, if the problem persists, you may want to create a warranty case, as the Ethernet port may have a problem.
I had 3 unmanaged Netgear switches, every one of them had problems auto negotiating. Ended up replacing them with TP-Link switches as other clients on the network were having problems. Perhaps different firmware?
As you may read above, I am using dd-wrt. It does not support jumbo frames. Previously when I had this behavior, it was plugged into two different tp-link unmanaged switches and have only since my last post moved it directly to a port on the Netgear router.
I have opened a warranty case (or at least I thought I did) and received no confirmation that the request was received. I submitted another one today just to make sure it didn't have any issues opening the case yesterday, again no confirmation.
I can confirm that we received both cases, the one from yesterday and the additional one from earlier today. We will review your case and you should expect a response by end of the day.
