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Forum Discussion
CM1200 Ethernet Ports not responding
I have a NetGear CM1200 which I installed in a non-profit that I support back in April (6 months ago). The network ports simply died yesterday, so I called in a support ticket. I am well aware...
A couple things.
The CM1200 has 4x ethernet ports. But for the vast majority of ISP's, only 1 device can be connected at a time. Reason why is most ISP's only assign 1 public ip address. so even though it has more ports, only 1 device can get that ip address. If there's a router and other devices connected to it, if that ip address gets assigned to a computer, the router won't function.
So try this.
disconnect the coax cable from the modem and all ethernet devices. While the modem is powered on, push and hold reset for 7-15 seconds. Let it run through a complete reset/reboot cycle.
Then power it off and leave it off 2 minutes.
then connect the coax back to it and power it on.
Wait 2 minutes.
Then connect lan port 1 to the wan port on the router.
then power the router on.
Try to setup the router.
Didn't work?
What does the event log show in the modem?
Can you ping the modem? (192.168.100.1)
what are the led's on the ethernet ports showing?
Thanks for the guidence. I tried all of the above and I also tried variations of booting this modem. The ethernet ports are simply not accessable, nor do they ever light up. I cannot pull down any event log if I cannot access any ports. There's not much more that can be done, hence I'm 99% certain it's a hardware problem that is under warranty.
With that, I moved forward with a leased modem from Comcast and I'll just toss this modem in the trashcan. The lease from Comcast was cheaper than the annual support contract from NetGear that I need to pay to get my warranty.
You might try a different power supply. IF that fails, then modem maybe bad.
