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Forum Discussion
CM1150v Disconnects nightly with Xfinity/Comcast
Overnight, my cable modem often times starts to experience packet loss in the range of 40% until the cable modem is rebooted.
I have ehternet port aggregation turned off.
This has happend every morning for 2 weeks straight. I restart the modem and things work well for 12-24 hours.
Continuous ping from separate (work computer) shows same 40% packet loss (to external/public cable modem IP)
Internal continuous ping to wifi router shows 0% loss. Internal continuous ping to google.com shows 40% packet loss.
Comcast came out, replaced outside cable, replaced inside amplifier, checked power levels etc.
next morning saw same issue.
Anyone have any thoughts? Things I can check?
Of course, I bought the modem on 5/7/2020 and I am just past 90 support for netgear.
I previously purchased a NetGear wifi router that kept dropping 5 Ghz. I think it is safe to say, I will never buy a Netgear product ever again. This modem was very expensive relative to others due to supporting 1gig and port agg.
7 Replies
Your signal should be good enough you don't need an amplifier. Amplifiers can cause issues when running to modems.
What I'd start with is directly connecting the cm1150v to the incoming line with no splitters, amplifiers, or attenuators and see how it works. Make sure to directly connect a pc to the modem (without router) so you can rule out the router being the issue as well.
If you don't get signal drops/issues, then its related to how its wired up.
If you do, then get screen snips of the cable connections page and the logs and post them back here.
Thanks for the reply!
The comcast tech oddly didn't have a problem with the amplifier.
Also, everything has been working great since May 8th when I installed the modem until last week.
Anything I can check in the modem logs?
Also, I checked the VOIP phone this morning during the problerm and it seemed to be having issues as well. This morning's packet loss was in the 15% range where other days I have seen 40%. Will try that test again during 40% packet loss.
Are you connected directly to the modem?
have you removed the amplifier and tried it without it?
Do you have the screen snips asked for prior?
pls provide connection table + event logs when the problem happens
My connection has been more stable, meaning, i haven't had to restat the modem every day since the tech was here on 8/27. I restarted on 8/28, 9/1, 9/6 and today.
This morning at 12:17am (central) is when my connection started to become unstable.
I believe the logs in the attached file are eastern time..I am unsure how to connect my laptop directly to my cable modem. When I plug into to eth port 2, I don't get an IP address. So, I unplugged my router and plugged into eth1, still don't get an address. If I must reboot the model to get the laptop to establish an address, that will be worthless because a reboot fixes the issue.
I attached the info I believe you requested.
I did not attach EMTA logs (looked like the timestamps didn't go back to midnight).
I can attach those if needed.Logs are beneficial with the cable connections page.
If its happening daily, justt hook up a computer directly and leave it for a day. We're just trying to determine if it is indeed a modem/signal issue or a router issue.
