I have a Motorola SBG6580 router.
A few days ago, I noticed my wireless connection stopped working and the internal IP address I had for one of my devices stopped working, even though I had reserved an IP address for it. I later found it at a different IP address (went from 192.168.0.9 to 192.168.0.3 suggesting the router gave it the lowest available IP address).
My router's homepage (http://192.168.0.1/ for me) now has an Arris logo, but this didn't worry me too much after I learned that Arris and Motorola are the same company.
When I visit http://192.168.0.1/About.asp it tells me the firmware version and some other quasi-useful information:
The firmware Version is SBG6580-8.6.2.0-GA-00-131-NOSH
The SBG6580 has been running for 5 days 04h:07m:18s
The cable modem is Operational
The cable modem receive signal is 657.0 MHz, 12.0 dBmV & 41.8 dB CNR (primary).
The DDNS service is disabled.
IP Filtering is configured for 0 IP addresses.
Port Filtering is disabled.
Port Forwarding is disabled.
The DMZ Host is 192.168.0.0.
The wireless radio is enabled and set to 5Ghz.
The Wireless - Primary Network 5Ghz SSID is SBG65809F and encryption type is WPA2-PSK .
The number of wireless client(s) connected 0.
The wireless access control list for 5Ghz is disabled and has 0 entries.
Wireless QoS (WMM) is enabled.
The firewall level is low.
Parental Control content filtering table is not Used.
I have read other messages in this (and other forums), and the problem universally appears to be that Comcast force-pushed an upgrade to people's routers, so I contacted Comcast. They told me:
After looking at your account I see that you use your own modem made by Motorola. I also did not see that we had pushed any firmware updates to your account since your modem is self-owned. I can confirm that Arris is the same manufacturer as Motorola so I would recommend contacting the manufacturer of your modem to inquire about having them change your IP address.
While it's not clear that Comcast understands the problem (the rest of the message implies Comcast is talking about my public IP address), Comcast has denied pushing an update.
Before I contact Motorola directly, is there anything I can do to either downgrade and/or upgrade to a firmware version that doesn't break my wireless and IP assignment?
I've considered the possibility that Comcast's reply to me is simply inaccurate, but most of the online complaints about this problem date back to 2013, so I'm not sure why they would suddenly decide to push an upgrade. I've had Comcast service for months, so this isn't a question of them auto-upgrading when I started service.