Connectivity and managing Your Comcast Business network
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New Member

Internet drops frequently during the day

I'm writing this on behalf of my client.


I've tried chat, I've tried calling, but it seems someone comes out, blames it on the modem, replaces it, and we still have problems.


I've tried to troubleshoot this as much on my end as possible.  My theory has been equipment overheating, just because this happens a lot in the afternoon.  I'm monitoring the IP addresses of the Comcast Modem, the default gateway of it, our public IP, a system that is pingable that is NOT behind our firewall and our firewall.  When we lose internet, we lose everything but the upstream gateway of the Comcast modem.  I use to monitor the connection.


The cablemodem, again, just replaced Tuesday, is a Netgear.  Hardware version 1.04, firmware v3.01.15.


The signal levels, from the troubleshooting post on here, the only one out of spec is the upstream power level at 57.0 dBmV.


The network topology, again, let's forget about everything and focus on that internal IP address (from the 10.1.10.x range or even the WAN DHCP address, both of which don't respond to pings with the service goes down.  This has been ongoing for several months.  Sometimes it isn't as bad, again, this is why I was focusing on heat.


On a site visit the other day, the cable is run buried from the pole near the street to the building.  It looks to be standard RG6.  It also looks to be just inches from the top of the dirt.  During the heat of the day, the ground might be causing an issue.  I haven't found anyone else concerned with this, just concerned with replacing the modem.  So far, this hasn't helped. I understand there is construction costs involved, but I think this needs to be routed better to the building.


Is there any way to talk to someone that will do something other than replace the modem?  It was replaced Tuesday, and this is my findings from Wednesday:


Down at 12:35 pm up at 12:41 pm

Down at 2:47 pm up at 3:00 pm

Down at 3:07 pm up at 3:09 pm

Down at 3:50 pm up at 3:57 pm

Down at 4:01 pm up at 4:10 pm

Down at 4:13 pm up at 4:23 pm

Down at 4:36 pm up at 4:43 pm




Down at 2:27 pm up at 5:59 pm


Today was less outages, but it was down almost all afternoon.


Official Employee

Re: Internet drops frequently during the day

Thanks for sharing these details about what you have been experiencing with your internet service. I am sorry you have lost connection over this length of time. I can take a closer look at your service and connection. Are you able to send a private message so I can help and get more information for you? If you could include your name, account number, and service address, this would be great. 

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New Member

Re: Internet drops frequently during the day

We are on Node Bravo77. We've had so many utages this summer I have lost count. RIDICULOUS. Comcast internet is completly dropping for 5-20 minutes at a time  2-10 times EVERY DAY. My modem has been replaced twice this summer, my ground block and feed line have been replace twice as well.  I have been a Comcast Cable Modem customer since 1999 and on the Business Class since 2008. We've never really had any problems until this summer. Now it is basically unreliable and unusable. I am hosting servers for clinics, and never had a problem until recently.  I don't know why Comcast is unable to resolve this problem and provide reliable internet. When you pay hundreds of dollars a month for service, you expect it to work.

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Occasional Visitor

Re: Internet drops frequently during the day

Happens to me also.
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