Completely Stumped on an easy (?) networking issue

Hello all - I have been playing with HA for about a year now but I lost connectivity to it this week after Xfinity (insert #$%&%*! here) “reset” our internet.

I have a HA Green which hangs off of one of my deco routers. The LED activity says its running normally and I can see on my Deco app that HA has the IP of http://192.168.68.71.

Weirdly, even though I can see the IP and lights, I can’t ping it or get 192.168.68.71:8123 to resolve. My mapped drive to the folders also says disconnected. I confirmed that device isolation is turned off but that is the extent of my network knowledge.

Any ideas on how to regain access?

What IP does the device that you are trying to ping HA from have?

So you have routers (in plural) in your network handing out ips and so on?

Can you connect a keyboard and monitor to it?

Did you try rebooting your deco?
I have endless issues with this crap where ipv4 mysteriously stops working through them.

You can always open CMD and ping homeassistant.local -4

You’ll get an IP address and results if it’s replying to the ping.

Thanks everyone for your input. I’ll put my answers here in one spot:
@fleskefjes - I believe I am pinging from 10.0.0.185 to http://192.168.68.71:8123/. However, I could be wrong. My ipconfig is below.
My router is a 6E mesh router and came as a 3-pack. So yeah, I have 3 but I believe they act as 1 device.

@koying I have rebooted the entire system (xfinity gateway, deco router, and HA Green) from scratch with the same result.

@LiQuid_cOOled I have not tried to connect a monitor/keyboard but I did notice that my app (android) is working as expected
Also, I tried your ping and here are the results: C:\Users\jason>ping homeassistant.local -4
Ping request could not find host homeassistant.local. Please check the name and try again.
Having said that, I am not sure that I set HA up correctly. I thought I had listed homeassistant to resolve to HA but I have had issues getting to my instance with homeassistant even before these issues started.

What are you seeing via the android app? It appears at first glance you have a network address conflict.

Does http://10.0.0.185:8123 work or is that your PC address?

Seems you have at least two different networks with two different dhcp servers. Likely you need to look over your network and get everything on one network.

@LiQuid_cOOled / @fleskefjes - thanks a ton. This seemed to be the issue. I have an HDMI switch I use to switch between computers. I ran my HDMI directly to my monitor and that seemed to address the issue. As you can tell, my network knowledge is lacking so your feedback was really helpful. Thanks again!

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Happy we were able to assist with a resolution.