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Have interneet with modem/router, but no when plugged directly in modem
Have some basic equipment for my internet. A CM700 modem, a R7000 router. Have internet connection with the following setup:
Xfinity => CM700 (modem) => R7000 (router) =(wired)=> PC
I want to test the speed at the point of the modem, not the router. So I plug my Ethernet cable not to the router, but to the modem. This is supposed to work automatically. But can't get any connection.
Is this specific to the modem CM700? There isn't anything setting you can change. I am also disappointed its interface (genie) doesn't have any speed test built-in (Netgear seems usually weak on interface). The Nighthawk app can't detect it either.
Thanks.
When you directly connect your pc/laptop to the modem, the isp doesn't automatically reassign the ip address if it isn't powered off.
So power off the modem (and the laptop/pc). Give it a couple minutes. Then power on the modem without a device connected to it.
Once its fully booted, then connect your pc/laptop and power it on. Give a bit to fully boot.
That should get you a connection.
In terms of the modem not having a speed test, its not a router. Its a modem only device. I've got quite a few modems (from several companies) and none of the modem only device have any speedtesting built in. Again, they're modem only device.
5 Replies
When you directly connect your pc/laptop to the modem, the isp doesn't automatically reassign the ip address if it isn't powered off.
So power off the modem (and the laptop/pc). Give it a couple minutes. Then power on the modem without a device connected to it.
Once its fully booted, then connect your pc/laptop and power it on. Give a bit to fully boot.
That should get you a connection.
In terms of the modem not having a speed test, its not a router. Its a modem only device. I've got quite a few modems (from several companies) and none of the modem only device have any speedtesting built in. Again, they're modem only device.
Thanks for the quick reply.
So I did that. Plugged the Ethernet cable from my PC directly to the modem. Waited long enough to power off/on the modem. Still my PC is unable to connect. Just to note I did not reboot my PC. Thought it was unnecessary, and had work there so couldn't at the moment.
When I plugged the router back into the modem, it does take a reboot of the router to re-establish the connection.
I will have to find time later to do more experiments.
Meanwhile, Comcast has agreed to send someone over to take a look of the connection cables. It's an old house. We'll see.
Note
had checked out another case:
which seemed to be the opposite of my situation. Not clear its solution will apply to mine. But interesting. But plemans seems to be actively helping people. Thank you.
After some repeated tries, I determined what t @plemans advised was correct. If you plug into to the modem, reboot the modem, then your PC should be able to establish a connection. Not sure why when I first did it, it did not quite work.
Since I am here, I may as well report what I found.
The speed I can from the modem is good, as good as Comcast/Xfinity promised. It's my router. Got a Cat6 cable linking the two. There isn't anything simpler than that. Though Netgear doesn't have anything on the mode, it does have a Nighthawk app which can run a speedtest on the router itself. This is must more reliable than if I run it form a connected PC (which links through cables and switches), though at the end, it did not matter as the test results were close). The internet speed form the router is so much lower (like 40% degradation) that I have to conclude the router has a problem. It's an old router, but still capable of Gigabit, which is much higher than my paid internet service.
Why is that? No idea. I guess I should either upgrade or open a different thread.
For now, this is the end of my question. Thanks to all who helped.
If you have the r7000, try factory resetting it. during the install, make sure to leave qos, access control, traffic monitoring, and parental controls all disabled. Then test the wired speeds.