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Forum Discussion
Cm1000v2 not seen by computer.
I replaced my old Motorola surfboard with a new cm1000v2. Xfinity changed the Mac address and ran there tests and all was good. Said modem is online. The router did not connect. I connected the modem ...
I spent 2 hours on the phone again with Netgear support(first line), not technical experts. Endless amounts of resets and power off/on cycles. Xfinity has the netgear modem setup and did much testing. I finally gave up for today. Decided to reconnect my router and put the old modem back so I can still get some work done. I was surprised to see everything worked without (!!!) reconfiguring xfinity back to the old modem. So I guess xfinity remembers all the modems you have configured. Seems nobody knows what the problem is, all they know is to try various combinations of power off/on, resets, and cable disconnects and connects.
I have tried connecting the modem directly to windows 7 desktop and laptop and windows 11 desktop and laptop.
If I understood better, I could probably diagnose by looking at ipconfig printout comparing the old and new modems.
I appreciate all ideas!
Thorslund wrote:I spent 2 hours on the phone again with Netgear support(first line), not technical experts. Endless amounts of resets and power off/on cycles. Xfinity has the netgear modem setup and did much testing. I finally gave up for today. Decided to reconnect my router and put the old modem back so I can still get some work done. I was surprised to see everything worked without (!!!) reconfiguring xfinity back to the old modem. So I guess xfinity remembers all the modems you have configured.
I think you are probably in error here. Xfinity only allows one modem to be registered to an account at a time. The modem MAC address is the registration reference.
Seems nobody knows what the problem is, all they know is to try various combinations of power off/on, resets, and cable disconnects and connects.
I have tried connecting the modem directly to windows 7 desktop and laptop and windows 11 desktop and laptop.
If I understood better, I could probably diagnose by looking at ipconfig printout comparing the old and new modems.
I appreciate all ideas!
Once you get a modem registered to your account and booted with the internet access indicator illuminated, connect an Ethernet cable to your turned off computer and boot the computer. Be patient, I have seen it take as long as 20 minutes for the Xfinity DHCP servers to assign an IP address to a direct connected computer. Especially the first time when the MAC address of the computer has not previously been assigned an IP address. Usually a computer is connected on the LAN side of the firewall and the Xfinity DHCP servers never see the MAC address.