EISY functionality lost during internet outages

[MMAltair]

Not sure if this is the right place to post this but I think this might be related to Polyglot so here goes.

Our internet access has had intermittent outages recently (Xfinity) likely related to work being done by T-Mobile to install fiber in the neighborhood (how ironic). Each time there is an outage I lose functionality in the EISY system which I wouldn't expect to happen. I have not tried to debug this by creating outages but that's the next step if needed.

Here are the details -

 I have an EISY system running IoX 5.9.1. I also have an ELK security system and the Polyglot ELK plugin for communication between the ELK system and EISY. I use the condition of ELK motion and door sensors to control various functions (like turning Insteon lights on and off, and relaying status through UD mobile of status events like a garage door opening). I understand that any functionality related to UD Mobile will not work during an internet outage but I would expect that internal network functionality would continue to work during the outage.

I have a Unifi DM Pro network and I know the network is working properly during the outage. I can access IP cameras on my network as well as access local computers on my network and other local IoT devices. Am I missing something on expected local functionality during an internet outage?

One other thing I have noticed is I can't launch the IoX Launcher during an internet outage. It tries to launch but eventually the application shuts down. Is this expected behavior? 

[Javi]

Local access should work, however it is highly dependent on the device.  Many devices, especially Apple devices, will not route traffic to a WiFi Connection without internet.  So even if you force it to connect to WiFi it will not send requests.

https://wiki.universal-devices.com/UD_Mobile#WiFi_Connections_without_internet

[MMAltair]

48 minutes ago, Javi said:

Local access should work, however it is highly dependent on the device.  Many devices, especially Apple devices, will not route traffic to a WiFi Connection without internet.  So even if you force it to connect to WiFi it will not send requests.

https://wiki.universal-devices.com/UD_Mobile#WiFi_Connections_without_internet

Thanks, this helps my understanding of how UD Mobile works with in a local only environment. I checked the UD Mobile local IP settings and the IP address was incorrect, likely due to some changes I had made to my network in the past. I do have static IP addresses for EISY and ELK in my network so in the future I should be able to have UD Mobile local access when the internet is down.

I think my other question is still unanswered. Should EISY and Polyglot plugins be able to continue operating (communicating) when the internet connection is down? The functionality that isn't working is all over the local network through static IP address. Also, everything is connected with ethernet cables, not WiFi.

If the UD Mobile local access will work (now) I can try an experiment of disconnecting the internet from my router and see if EISY and the ELK plugin are communicating properly. If the answer to this question is already known that would also help.

[MMAltair]

To add a bit more detail. After the 3 hr long internet disruption last night I have now figured out that the ELK Plugin was no longer communicating with EISY even after the internet access was restored. After I restarted the ELK Plugin things are back to normal. I have noticed this happen in the past (the ELK Plugin not communicating with EISY) but did not connect it with a loss of Internet connectivity. When this happened in the past restarting the plugin always fixed it. Loss of internet connectivity isn't always noticed unless someone is impacted by it, for example, if it happens in the middle of the night or if the disruption only lasts a few seconds. The next time the ELK plugin hangs up I'll check my router logs to see if an internet connection disruption has been logged.