Isy constantly connects and disconnects from interne

[jstjohnz]

This is a strange one, please bear with me.

ISY 994i controlling about a dozen lights using old Insteon dimmers. 

I recently changed my router to a ubiquity UniFi gateway (UXG-MAX) and have been having strange issues with the ISY ever since. If I log into the device locally using my PC, I can see and control all dimmers with no problems.

However, if I try to control the lights with Alexa commands, Alexa will say sorry the hub for that device is not responding. On my phone, from the UD mobile app, i get message: :ISY is now online, then ISY is now offline, these messages will pop up on average, staying online for about five minutes, then going off-line for 30 to 60 minutes.  

When the device is shown as online, it will respond to an Alexa voice command, in other words, Alexa will change the dimmer setting as requested, but then Alexa follows up by saying “sorry, the device is not responding” even though it has responded.

I have tried both static IP and DHCP, problem exists either way.  Over the years, I have used the ISY with quite a few different routers And have never had an issue like this one.

 

 

[Geddy]

@jstjohnz what was your previous router? It's possible that the new Unifi router is blocking the traffic for the ISY994 causing the portal to not stay connected. Is the ISY994 directly connected to this router or another switch/hub? I would suggest trying a different network cable as first step to fix.

Does your old router still work? I would go back to that router to see if the connection still has issues (maybe test it just for a few hours or maybe a day at most - if possible). 

Since you have some success then I would say the portal license is valid, but just to be sure login to the portal and confirm your license has not expired. 

What firmware are you running on the ISY994? Since you're using UD Mobile it's in the 5.x branch, but are you on the last update for your situation? If you don't have z-Wave or are not using it then please be sure you are running 5.3.4 (you can find that information in the "Current Release" area of the forums.

The current suggested method for IP control is only through router DHCP reservation for the device. Setting up a static IP on the ISY994 can sometimes cause issues (especially when replacing routers). Please leave the ISY994 setting to auto for DHCP. 

Are you running any VLANs or advanced firewall rules on the new router? Do you have a "guest" or "IoT" network setup that might have time limits or on/off times?

If you're able to connect to the admin locally while the device is "offline" in the portal that means there is internet traffic issue. The next time you get an alert that it is offline try to connect to admin console from a computer that is local to the ISY994. If it connects without issue your router/internet would probably be the issue to next troubleshoot.

[jstjohnz]

At this point, I am convinced that the problem is in fact some issue with the UniFi router, causing it to block traffic that the ISY needs, just not sure why it is intermittent.

At this point, I am convinced that the problem is in fact some issue with the UniFi router, causing it to block traffic that the ISY needs, just not sure why it is intermittent.

What I did as a workaround is to connect the ISY to a lan port of a 5G Internet box that I use for back up Internet.  It seems to be happy with that since I can once again use Alexa commands to control my dimmers with no issues.
 

previous router was PfSense. So far I have had no luck in tracking down what setting on the UniFi router it is that is causing the issue.