I think I am having similar problem. Got upgraded from 300mbps to 1GBps about 5-6 weeks ago. Swapped out comcast's modem for Netgear CM1150V modem. First few weeks everything ran ok but in the last week or two internet would drop. Only fix was rebooting the cable modem. I have noticed the upstream link light blinks green when everything goes down. My last cable modem was netgear and never dropped. Now I am losing internet 1x to several times daily.
Called comcast they said my signals looked good when I spoke to them. Here are my logs and status. Is this a netgear issue, firwmare issue, xfinity issue?
Frequency start ValueThis field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
|Acquire Downstream Channel||675000000 Hz||Locked|
|IP Provisioning Mode||Honor MDD||honorMdd(4)|
Downstream Bonded Channels
|Channel||Lock Status||Modulation||Channel ID||Frequency||Power||SNR||Correctables||Uncorrectables|
|1||Locked||QAM256||35||675000000 Hz||2.4 dBmV||41.9 dB||0||0|
|2||Locked||QAM256||6||507000000 Hz||2.9 dBmV||43.3 dB||0||0|
|3||Locked||QAM256||7||513000000 Hz||3.5 dBmV||43.4 dB||0||0|
|4||Locked||QAM256||8||519000000 Hz||2.7 dBmV||43.1 dB||0||0|
|5||Locked||QAM256||9||525000000 Hz||2.4 dBmV||43.1 dB||0||0|
|6||Locked||QAM256||10||531000000 Hz||2.9 dBmV||43.1 dB||0||0|
|7||Locked||QAM256||11||537000000 Hz||2.9 dBmV||43.3 dB||0||0|
|8||Locked||QAM256||12||543000000 Hz||3.2 dBmV||43.3 dB||0||0|
|9||Locked||QAM256||13||549000000 Hz||3.2 dBmV||43.4 dB||0||0|
|10||Locked||QAM256||14||555000000 Hz||2.8 dBmV||43.2 dB||0||0|
|11||Locked||QAM256||15||561000000 Hz||3.3 dBmV||43.3 dB||0||0|
|12||Locked||QAM256||16||567000000 Hz||2.7 dBmV||43.2 dB||0||0|
|13||Locked||QAM256||17||573000000 Hz||2.9 dBmV||43.2 dB||0||0|
|14||Locked||QAM256||18||579000000 Hz||2.7 dBmV||43 dB||0||0|
|15||Locked||QAM256||19||585000000 Hz||2.6 dBmV||43 dB||0||0|
|16||Locked||QAM256||20||591000000 Hz||2.9 dBmV||43.1 dB||0||0|
|17||Locked||QAM256||21||597000000 Hz||2.2 dBmV||42.9 dB||0||0|
|18||Locked||QAM256||22||603000000 Hz||2.3 dBmV||42.9 dB||0||0|
|19||Locked||QAM256||23||609000000 Hz||3.1 dBmV||43.1 dB||0||0|
|20||Locked||QAM256||24||615000000 Hz||2 dBmV||42.6 dB||0||0|
|21||Locked||QAM256||25||621000000 Hz||2.4 dBmV||42.7 dB||0||0|
|22||Locked||QAM256||26||627000000 Hz||2.7 dBmV||42.9 dB||0||0|
|23||Locked||QAM256||27||633000000 Hz||2 dBmV||42.7 dB||0||0|
|24||Locked||QAM256||28||639000000 Hz||3 dBmV||42.9 dB||0||0|
|25||Locked||QAM256||30||645000000 Hz||3.3 dBmV||43.1 dB||0||0|
|26||Locked||QAM256||31||651000000 Hz||3.7 dBmV||43.2 dB||0||0|
|27||Locked||QAM256||32||657000000 Hz||3.2 dBmV||42.9 dB||0||0|
|28||Locked||QAM256||33||663000000 Hz||1.9 dBmV||42.5 dB||0||0|
|29||Locked||QAM256||34||669000000 Hz||2.1 dBmV||42.5 dB||0||0|
|30||Locked||QAM256||36||681000000 Hz||2.1 dBmV||42.5 dB||0||0|
|31||Locked||QAM256||37||687000000 Hz||2.3 dBmV||42.5 dB||0||0|
|32||Not Locked||Unknown||0||0 Hz||0.0 dBmV||0.0 dB||0||0|
Upstream Bonded Channels
|Channel||Lock Status||US Channel Type||Channel ID||Symbol Rate||Frequency||Power|
|1||Locked||ATDMA||33||5120 Ksym/sec||36500000 Hz||44.8 dBmV|
|2||Locked||ATDMA||34||5120 Ksym/sec||30100000 Hz||45 dBmV|
|3||Locked||ATDMA||35||5120 Ksym/sec||23700000 Hz||45 dBmV|
|4||Locked||ATDMA||36||5120 Ksym/sec||17300000 Hz||44.5 dBmV|
|5||Not Locked||Unknown||0||0 Ksym/sec||0 Hz||0.0 dBmV|
|6||Not Locked||Unknown||0||0 Ksym/sec||0 Hz||0.0 dBmV|
|7||Not Locked||Unknown||0||0 Ksym/sec||0 Hz||0.0 dBmV|
|8||Not Locked||Unknown||0||0 Ksym/sec||0 Hz||0.0 dBmV|
Downstream OFDM Channels
|1||Locked||0||29||693000000 Hz||1.2 dBmV||41.4 dB||1108 ~ 2987||9944982||1735||0|
|2||Not Locked||0||0||0 Hz||0 dBmV||0.0 dB||0 ~ 4095||0||0||0|
Upstream OFDMA Channels
|Channel||Lock Status||Modulation / Profile ID||Channel ID||Frequency||Power|
|1||Not Locked||0||0||0 Hz||0 dBmV|
|2||Not Locked||0||0||0 Hz||0 dBmV|
Current System Time:Tue Jul 16 10:23:26 2019System Up Time:01:20:32
Need to get this fixed. Going on vacation and have security cams & smarthome that cannot access if modem goes down and nobody here to reboot.
Hi there. Sorry to hear about the trouble you're experiencing with your connection. I know how frustrating that can be! Based on the information that you provided, it does look like there are some signal issues present. Here is a great resource if you'd like to see for yourself: https://forums.xfinity.com/t5/Your-Home-Network/Xfinity-Internet-Connection-Troubleshooting-Tips/m-p.... Please go ahead and send me a private message with your name and I will be happy to help you out with this. It's very likely that we will need to get a technician out to the premise to resolve it.
To send a private message, please click my name "ComcastMorgan" then select "Send a Message" on the right side.
Hi and thanks for responding. I had a tech come out late last week. after I posted this. When I had called in they found some "rippled" on a few of the channels so they sent him. He found one line that was not shielded that the builder had put in. Once isolated we removed that from the splitter in my basement and the signal checked out strong, in range and normal.
We thought this would fix it but within a day I had more drops. I noticed they coincided with the use of Tivo Mini's but not consistently. Seems hit or miss. from what I read Tivo Moca could interfere with the Comcast GB service as a few of the channels on the cable modem may play in the same frequency range as Tivo using MocA. Just curious if you heard of this and if there are any solutions.
I read somebody put a PoE filter on the input of the cable modem to shield any tivo signals coming in. However, my concern is that also blocks frequencies the cable modem needs itself to access and lock onto.
I will PM you my info now.
Hi, marcNJ. I have been working with you along the way to continue with following through on ensuring we have reached a solution. I haven't heard back from you, so I assume everything is going well. I have completed this interaction, but please know that you're welcome to contact me directly via PM if you need further support on this from me. Thank you for being such a loyal customer of ours for many, many years. We appreciate you very much.