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Forum Discussion
CM1200 issues with Xfinity ISP and Google Wifi Router
I have Xfinity as ISP and I'm trying to ditch their Xfi (modem/ router) and cut the monthly rental fee but I'm having the hardest time trying to set up my google wifi routers to it. It continues sayi...
Your levels look pretty good. and the connect seems fine.
Reason you can't use all 4 ports is a little more complex. I'll try and hit the key points.
A modem isn't a router. it doesn't handle dhcp assignments. It gets a single IP address from the isp (for most isp's). It can use that address to do port aggregation between ports 1-2 if your router supports this. (google mesh doesn't)
It can use the other ports if your ISP supports multiple public ip addresses. Most ISP's (comcast/cox/spectrum) don't support this for consumers. Some of their business class services do.
I'd have to agree that for the vast majority of consumers, the CM1000 or CM1100 would be the best choice. Companies don't do a good job of explaining this and we run into it a lot in the forums.
Does the modem work if you go CM1200------>PC?
Make sure anytime you change which device is connected to the modem that you reboot it like this:
power off the modem and router
power on modem with nothing connected. give it a few minutes to fully boot.
connect device to modem
power on device (router/pc). give them time to fully boot.
Try resetting the google mesh back to factory (in case an old setting is causing an issue) for setup.
I had the same issue as the original post and was able to resolve it by following plemans' advice, below. While I'd thought I was taking those steps previously, turns out that I'd been trying to connect both my Google Wifi router AND the laptop to the CM1200 at the same time. Once I disconnected both devices, then started over following these steps below, the issue resolved. I'm relieved I didn't have to factory reset my Google Wifi.
plemans wrote:Make sure anytime you change which device is connected to the modem that you reboot it like this:
power off the modem and router
power on modem with nothing connected. give it a few minutes to fully boot.
connect device to modem
power on device (router/pc). give them time to fully boot.