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Netgear C7100V connectivity issues

Frequent Visitor

Netgear C7100V connectivity issues

Hi, 

 

I lose connectivity intermittently  - only thing that helps bring it back is a power reboot of the router. Tried resetting to factory defaults, moving it around (as much as I can), etc and nothing seems to work.

 

Logs suggest a Unicast Maintenance Ranging failure - no idea what than means. My channel logs are below. What can I try to resolve the daily inernet drops? 

 

Thanks in advance!

 

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 1 609000000 Hz -8.3 dBmV 38.9 dB 0 0
2 Locked QAM256 2 615000000 Hz -7.9 dBmV 38.9 dB 3 0
3 Locked QAM256 3 621000000 Hz -8.0 dBmV 38.6 dB 3 0
4 Locked QAM256 4 627000000 Hz -7.6 dBmV 38.5 dB 10 0
5 Locked QAM256 5 633000000 Hz -7.5 dBmV 38.6 dB 13 0
6 Locked QAM256 6 639000000 Hz -8.4 dBmV 38.4 dB 17 0
7 Locked QAM256 7 645000000 Hz -8.7 dBmV 38.2 dB 20 0
8 Locked QAM256 8 651000000 Hz -8.5 dBmV 38.3 dB 9 0
9 Locked QAM256 9 657000000 Hz -8.8 dBmV 37.9 dB 19 0
10 Locked QAM256 10 663000000 Hz -8.7 dBmV 37.9 dB 24 0
11 Locked QAM256 11 669000000 Hz -8.2 dBmV 38.3 dB 20 0
12 Locked QAM256 12 675000000 Hz -7.9 dBmV 38.1 dB 25 0
13 Locked QAM256 13 681000000 Hz -7.2 dBmV 38.6 dB 22 0
14 Locked QAM256 14 687000000 Hz -6.9 dBmV 38.7 dB 31 0
15 Locked QAM256 15 693000000 Hz -6.7 dBmV 38.7 dB 26 0
16 Locked QAM256 16 699000000 Hz -6.6 dBmV 38.7 dB 30 0
17 Locked QAM256 17 705000000 Hz -7.4 dBmV 39.0 dB 0 0
18 Locked QAM256 18 711000000 Hz -7.3 dBmV 39.0 dB 0 0
19 Locked QAM256 19 717000000 Hz -6.8 dBmV 39.4 dB 0 0
20 Locked QAM256 20 723000000 Hz -7.7 dBmV 39.1 dB 0 0
21 Locked QAM256 21 729000000 Hz -8.3 dBmV 39.0 dB 0 0
22 Locked QAM256 22 735000000 Hz -7.8 dBmV 39.0 dB 0 0
23 Locked QAM256 23 741000000 Hz -7.8 dBmV 39.0 dB 0 0
24 Locked QAM256 24 747000000 Hz -7.7 dBmV 39.0 dB 0 0

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 37800000 Hz 51.0 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 31150000 Hz 51.0 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 24500000 Hz 51.0 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 17850000 Hz 51.0 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
Gold Problem Solver

Re: Netgear C7100V connectivity issues

"Unicast Maintenance Ranging failure" means the device is losing its connection to Comcast. The downstream signals you posted are borderline/low, and the upstream signals are too high.

 

If you want to troubleshoot this yourself, please see Connection Troubleshooting Tips. If you can't find the problem or you'd rather have Comcast do the troubleshooting, call them at the phone number on your bill or 1-800-Comcast, or chat with them using one of the "Trouble" options at https://www.comcastsupport.com/chatentry/. If they can't fix the problem remotely, insist they send a tech out to identify the cause and correct it.

If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit unless you have or sign up for their Service Protection Plan (https://www.xfinity.com/support/account/service-protection-plan/, about $6/mo) and keep it for at least 60 days. If the trouble is due to a faulty Comcast modem, eMTA, gateway device, or anything outside your home, you shouldn't be charged.

Official Employee

Re: Netgear C7100V connectivity issues

mronut5988, thanks for the private message. I do see some signal issues (upstream ripples and ICFR issues) as well as a few T3 timeouts. Typically, upstream ripples come from distorted signals in the trunk line outside of your home-- but because I'm seeing additional issues, we could be looking at a few possibilities. 

 

I'd like to start by sending a provisioning signal to your modem to see if we see any improvement. When is a good time to send that signal? 

 

KenF

Frequent Visitor

Re: Netgear C7100V connectivity issues

Thanks.

 

Ken - you can send a signal any time.

 

Addl' logs in today:

 

2017-08-04, 16:23:43.0 Notice (6) WiFi Interface [wl1] set to Channel 44 (Side-Band Channel:N/A) - Reason:GUI
2017-08-04, 04:51:00.0 Warning (5) Unicast DSID PSN startup error
2017-08-04, 04:46:16.0 Warning (5) Unicast DSID PSN startup error
2017-08-04, 04:44:26.0 Critical (3) Resetting the cable modem due to docsDevResetNow
2017-08-04, 04:27:51.0 Notice (6) WiFi Interface [wl1] set to Channel 149 (Side-Band Channel:N/A) - Reason:GUI
2017-08-03, 10:52:14.0 Warning (5) MDD message timeout;CM-MAC=b0:b9:8a:d7:db:00;CMTS-MAC=00:38:df:08:d5:5e;CM-QOS=1.1;CM-VER=3.0;
2017-07-29, 08:49:45.0 Warning (5) Unicast DSID PSN startup error
2017-07-29, 00:06:56.0 Notice (6) WiFi Interface [wl0] set to Channel 8 (Side-Band Channel:4) - Reason:GUI
2017-07-29, 00:06:56.0 Notice (6) WiFi Interface [wl0] set to Channel 8 (Side-Band Channel:N/A) - Reason:INTERFERENCE
2017-07-28, 23:59:03.0 Notice (6) WiFi Interface [wl0] set to Channel 8 (Side-Band Channel:N/A) - Reason:INTERFERENCE
2017-07-28, 23:58:59.0 Notice (6) WiFi Interface [wl0] set to Channel 8 (Side-Band Channel:4) - Reason:GUI
2017-07-28, 23:45:12.0 Notice (6) WiFi Interface [wl1] set to Channel 157 (Side-Band Channel:N/A) - Reason:GUI
2017-07-28, 23:45:07.0 Notice (6) WiFi Interface [wl0] set to Channel 11 (Side-Band Channel:N/A) - Reason:GUI
2017-07-28, 16:45:36.0 Warning (5) MDD message timeout;CM-MAC=b0:b9:8a:d7:db:00;CMTS-MAC=00:38:df:08:d5:5e;CM-QOS=1.1;CM-VER=3.0;
2017-07-28, 05:52:01.0 Warning (5) Unicast DSID PSN startup error
Frequent Visitor

Re: Netgear C7100V connectivity issues

I went through and physically re-installed the cable coax line, rebooted everything all over again and it seems like it's holding true. No drops for the last 24 hours. No losses. 

 

Diamond Problem Solver

Re: Netgear C7100V connectivity issues

For curiosty, what do the signal stat figures look like now ?

Frequent Visitor

Re: Netgear C7100V connectivity issues

<tabindex=-1>Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 1 609000000 Hz -4.6 dBmV 39.3 dB 562 0
2 Locked QAM256 2 615000000 Hz -4.4 dBmV 39.2 dB 614 0
3 Locked QAM256 3 621000000 Hz -4.7 dBmV 38.9 dB 828 0
4 Locked QAM256 4 627000000 Hz -4.3 dBmV 38.8 dB 1148 0
5 Locked QAM256 5 633000000 Hz -4.1 dBmV 38.9 dB 1714 0
6 Locked QAM256 6 639000000 Hz -4.5 dBmV 38.8 dB 1648 0
7 Locked QAM256 7 645000000 Hz -4.5 dBmV 38.8 dB 1574 0
8 Locked QAM256 8 651000000 Hz -4.1 dBmV 38.9 dB 1543 0
9 Locked QAM256 9 657000000 Hz -4.2 dBmV 38.6 dB 1778 0
10 Locked QAM256 10 663000000 Hz -4.2 dBmV 38.5 dB 2200 0
11 Locked QAM256 11 669000000 Hz -3.9 dBmV 38.8 dB 1945 0
12 Locked QAM256 12 675000000 Hz -4.1 dBmV 38.3 dB 2099 0
13 Locked QAM256 13 681000000 Hz -3.7 dBmV 38.8 dB 2047 0
14 Locked QAM256 14 687000000 Hz -3.6 dBmV 38.9 dB 2006 0
15 Locked QAM256 15 693000000 Hz -3.6 dBmV 38.8 dB 2047 0
16 Locked QAM256 16 699000000 Hz -3.5 dBmV 38.8 dB 2377 0
17 Locked QAM256 17 705000000 Hz -4.1 dBmV 39.0 dB 0 0
18 Locked QAM256 18 711000000 Hz -3.8 dBmV 39.0 dB 0 0
19 Locked QAM256 19 717000000 Hz -3.2 dBmV 39.5 dB 0 0
20 Locked QAM256 20 723000000 Hz -3.9 dBmV 39.4 dB 0 0
21 Locked QAM256 21 729000000 Hz -4.3 dBmV 39.3 dB 0 0
22 Locked QAM256 22 735000000 Hz -3.7 dBmV 39.4 dB 0 0
23 Locked QAM256 23 741000000 Hz -3.7 dBmV 39.4 dB 0 0
24 Locked QAM256 24 747000000 Hz -3.9 dBmV 39.4 dB 0 0

<tabindex=-1>Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 37800000 Hz 50.0 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 31150000 Hz 48.5 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 24500000 Hz 47.0 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 17850000 Hz 47.0 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

 

 



Frequent Visitor

Re: Netgear C7100V connectivity issues

Mr E G

 

I posted my current stats. 

 

I still have not seen any drops in connection but hard to say. If you still observe something in my stats, please do let me know. I will work with Comcast customer service.

 

Thanks!

Diamond Problem Solver

Re: Netgear C7100V connectivity issues

Upstream channel number 1 is still on the high side.. What about the downstream ?
Frequent Visitor

Re: Netgear C7100V connectivity issues

Just pasted the table again. Somehow cut and paste deleted the Downstream stats. Smiley Happy

Diamond Problem Solver

Re: Netgear C7100V connectivity issues

O/k I see the downstream now. They are better but still do not have very much wiggle room. Hope things hold up for you. Good luck !
Official Employee

Re: Netgear C7100V connectivity issues

 

mronut5988, I'm glad EG was able to provide you with some solid info-- they know their stuff! 

 

Oddly, I'm not able to see a clear signal from your modem. I'm going to send a provisioning signal to your device so I can get a better read. I'll check on your modem in five minutes after I send the signal. 

 

KenF

Official Employee

Re: Netgear C7100V connectivity issues

So I just checked your signals again after the provisioning signal and I'm still not getting a read on your upstream ICFR or Upstream Ripples. Can we try this again with your router booted off? Let me know when you get home. 

 

KenF

Official Employee

Re: Netgear C7100V connectivity issues

Hi mronut5988. Can we try sending the signal now with the router unplugged? 

Gold Problem Solver

Re: Netgear C7100V connectivity issues


ComcastKenF wrote: ... Can we try sending the signal now with the router unplugged? 

How do you "unplug" the router component of a 3-in-one gateway device? If you're referring to an external router, what effect could that possibly have on RF signal levels at the modem?

 

And since when does "sending signals" fix RF connectivity problems, except perhaps temporarily???

Official Employee

Re: Netgear C7100V connectivity issues

Thanks for you concern, BruceW. mronut5988 and I have discussed these details privately. I cannot see their modem or router on my end so I will need them to reboot their devices (assuming the router is external) so that I can view them in my system and check out the signals. 

 

Are you experiencing any service issues at this time? 

 

 

Gold Problem Solver

Re: Netgear C7100V connectivity issues


ComcastKenF wrote: ... I cannot see their modem or router on my end ...

Then you should stop wasting their time and send out a premise tech. As suggested above, and despite the fervent belief of many Comcast reps, it is rarely possible to fix RF connectivity problems by "sending signals".

 

Are you experiencing any service issues at this time?

No, thank you. 

Official Employee

Re: Netgear C7100V connectivity issues

BruceW, we appreciate your concern. Before we can send a premise tech, we want to make sure we can read the signals on our end. 

 

Have a good day! 

 

KenF

Gold Problem Solver

Re: Netgear C7100V connectivity issues


ComcastKenF wrote: ... Before we can send a premise tech, we want to make sure we can read the signals on our end. ...

That makes no sense. If the device has lost its connection to Comcast, you won't be able to read its signals remotely, and any "signals" you send won't reach the device. Sending a premise tech would be the only way to fix the problem.

 

Note that a reset signal was sent at 04:44 on 8-4, and it didn't solve the problem:

 

2017-08-04, 04:44:26.0  Critical (3)  Resetting the cable modem due to docsDevResetNow

Official Employee

Re: Netgear C7100V connectivity issues

Thanks for your input, BruceW. 

Frequent Visitor

Re: Netgear C7100V connectivity issues

Ken,

 

Most recent table pasted below. Let's try your suggestion next week if you still cannot see the box. If not - maybe a tech is needed...

 

 

<tabindex=-1>Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 1 609000000 Hz -1.5 dBmV 39.8 dB 0 0
2 Locked QAM256 2 615000000 Hz -1.3 dBmV 39.7 dB 0 0
3 Locked QAM256 3 621000000 Hz -1.3 dBmV 39.6 dB 0 0
4 Locked QAM256 4 627000000 Hz -1.3 dBmV 39.5 dB 0 0
5 Locked QAM256 5 633000000 Hz -0.9 dBmV 39.5 dB 0 0
6 Locked QAM256 6 639000000 Hz -1.1 dBmV 39.5 dB 0 0
7 Locked QAM256 7 645000000 Hz -1.7 dBmV 39.4 dB 0 0
8 Locked QAM256 8 651000000 Hz -1.1 dBmV 39.5 dB 0 0
9 Locked QAM256 9 657000000 Hz -0.8 dBmV 39.3 dB 0 0
10 Locked QAM256 10 663000000 Hz -1.4 dBmV 39.2 dB 0 0
11 Locked QAM256 11 669000000 Hz -1.0 dBmV 39.3 dB 0 0
12 Locked QAM256 12 675000000 Hz -0.7 dBmV 39.1 dB 0 0
13 Locked QAM256 13 681000000 Hz -0.8 dBmV 39.4 dB 0 0
14 Locked QAM256 14 687000000 Hz -0.7 dBmV 39.4 dB 0 0
15 Locked QAM256 15 693000000 Hz -0.1 dBmV 39.5 dB 0 0
16 Locked QAM256 16 699000000 Hz -0.5 dBmV 39.4 dB 0 0
17 Locked QAM256 17 705000000 Hz -0.9 dBmV 39.9 dB 0 0
18 Locked QAM256 18 711000000 Hz -0.4 dBmV 40.3 dB 0 0
19 Locked QAM256 19 717000000 Hz -0.2 dBmV 40.3 dB 0 0
20 Locked QAM256 20 723000000 Hz -0.7 dBmV 40.3 dB 0 0
21 Locked QAM256 21 729000000 Hz -0.7 dBmV 40.3 dB 0 0
22 Locked QAM256 22 735000000 Hz -0.7 dBmV 40.1 dB 0 0
23 Locked QAM256 23 741000000 Hz -0.8 dBmV 40.0 dB 0 0
24 Locked QAM256 24 747000000 Hz -0.5 dBmV 40.2 dB 0 0

<tabindex=-1>Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 37800000 Hz 45.0 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 31150000 Hz 45.0 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 24500000 Hz 45.0 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 17850000 Hz 43.5 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



Frequent Visitor

Re: Netgear C7100V connectivity issues

I will also pull and post Event Logs from the weekend if any come up before Monday (when I expect you will see these posts from me).

 

Have a nice weekend!

 

BruceW - it's ok - I have patience to do this remotely until such time that we learn it cannot be done remotely. Thank you for your supportive posts - I do understand where you are coming from.

Official Employee

Re: Netgear C7100V connectivity issues

 

mronut5988, thanks for the updates. As I stated in private message, now that I can see your modem on my end, I'm getting fairly similar signal readings. I've sent you a message to confirm some time for an appointment this week--let me know when you're free. 

 

 

Frequent Visitor

Re: Netgear C7100V connectivity issues

Ken - new table.

 

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 1 609000000 Hz 2.6 dBmV 39.4 dB 626 172
2 Locked QAM256 2 615000000 Hz 2.5 dBmV 39.2 dB 393 0
3 Locked QAM256 3 621000000 Hz 2.6 dBmV 39.1 dB 639 0
4 Locked QAM256 4 627000000 Hz 2.7 dBmV 39.0 dB 778 0
5 Locked QAM256 5 633000000 Hz 2.7 dBmV 39.0 dB 1144 0
6 Locked QAM256 6 639000000 Hz 2.9 dBmV 39.0 dB 1176 0
7 Locked QAM256 7 645000000 Hz 2.7 dBmV 39.0 dB 1233 0
8 Locked QAM256 8 651000000 Hz 2.8 dBmV 39.0 dB 1393 0
9 Locked QAM256 9 657000000 Hz 3.1 dBmV 38.8 dB 1434 0
10 Locked QAM256 10 663000000 Hz 3.0 dBmV 38.8 dB 2052 0
11 Locked QAM256 11 669000000 Hz 3.0 dBmV 38.9 dB 1860 0
12 Locked QAM256 12 675000000 Hz 3.4 dBmV 38.8 dB 2044 0
13 Locked QAM256 13 681000000 Hz 3.6 dBmV 39.0 dB 2044 0
14 Locked QAM256 14 687000000 Hz 3.5 dBmV 39.0 dB 1956 0
15 Locked QAM256 15 693000000 Hz 3.9 dBmV 39.0 dB 2111 0
16 Locked QAM256 16 699000000 Hz 3.9 dBmV 39.0 dB 2399 0
17 Locked QAM256 17 705000000 Hz 3.2 dBmV 39.4 dB 0 0
18 Locked QAM256 18 711000000 Hz 3.8 dBmV 39.9 dB 0 0
19 Locked QAM256 19 717000000 Hz 4.2 dBmV 39.8 dB 0 0
20 Locked QAM256 20 723000000 Hz 3.2 dBmV 39.9 dB 0 0
21 Locked QAM256 21 729000000 Hz 3.8 dBmV 39.9 dB 0 0
22 Locked QAM256 22 735000000 Hz 4.0 dBmV 39.9 dB 0 0
23 Locked QAM256 23 741000000 Hz 3.9 dBmV 39.8 dB 0 0
24 Locked QAM256 24 747000000 Hz 3.9 dBmV 39.9 dB 0 0

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 37800000 Hz 42.5 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 31150000 Hz 41.0 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 24500000 Hz 40.5 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 17850000 Hz 40.5 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
Official Employee

Re: Netgear C7100V connectivity issues

Thanks for the updated table, mronut5988. 

 

I'm wondering if this is the result of some signal leakage from the unburied drop... 

 

Is your modem currently on? I can't see it on my end. 

Frequent Visitor

Re: Netgear C7100V connectivity issues

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 17 705000000 Hz 3.7 dBmV 39.1 dB 373672 922505
2 Locked QAM256 1 609000000 Hz 2.9 dBmV 39.6 dB 670 0
3 Locked QAM256 2 615000000 Hz 2.7 dBmV 39.5 dB 1011 0
4 Locked QAM256 3 621000000 Hz 2.9 dBmV 39.4 dB 1470 0
5 Locked QAM256 4 627000000 Hz 3.0 dBmV 39.3 dB 1864 0
6 Locked QAM256 5 633000000 Hz 2.9 dBmV 39.2 dB 2720 0
7 Locked QAM256 6 639000000 Hz 3.1 dBmV 39.2 dB 2751 0
8 Locked QAM256 7 645000000 Hz 2.8 dBmV 39.2 dB 3001 0
9 Locked QAM256 8 651000000 Hz 3.0 dBmV 39.2 dB 3199 0
10 Locked QAM256 9 657000000 Hz 3.2 dBmV 39.1 dB 3513 0
11 Locked QAM256 10 663000000 Hz 3.1 dBmV 39.0 dB 4557 0
12 Locked QAM256 11 669000000 Hz 3.0 dBmV 39.0 dB 4056 0
13 Locked QAM256 12 675000000 Hz 3.4 dBmV 38.9 dB 4517 0
14 Locked QAM256 13 681000000 Hz 3.7 dBmV 39.2 dB 4461 0
15 Locked QAM256 14 687000000 Hz 3.5 dBmV 39.2 dB 4428 0
16 Locked QAM256 15 693000000 Hz 3.9 dBmV 39.2 dB 4579 0
17 Locked QAM256 16 699000000 Hz 3.7 dBmV 39.8 dB 0 0
18 Locked QAM256 18 711000000 Hz 3.8 dBmV 39.9 dB 0 0
19 Locked QAM256 19 717000000 Hz 4.3 dBmV 39.9 dB 0 0
20 Locked QAM256 20 723000000 Hz 3.3 dBmV 39.8 dB 0 0
21 Locked QAM256 21 729000000 Hz 3.8 dBmV 39.9 dB 0 0
22 Locked QAM256 22 735000000 Hz 4.1 dBmV 39.9 dB 0 0
23 Locked QAM256 23 741000000 Hz 4.0 dBmV 39.9 dB 0 0
24 Locked QAM256 24 747000000 Hz 4.1 dBmV 39.9 dB 0 0

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 37800000 Hz 42.8 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 31150000 Hz 41.5 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 24500000 Hz 40.0 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 17850000 Hz 40.0 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
Frequent Visitor

Re: Netgear C7100V connectivity issues

2017-09-02, 21:41:55.0 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;
2017-09-02, 21:07:42.0 Warning (5) MDD message timeout;
2017-09-01, 17:57:42.0 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;
2017-09-01, 09:26:59.0 Warning (5) MDD message timeout;
2017-09-01, 09:26:13.0 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;
2017-08-31, 10:33:00.0 Warning (5) MDD message timeout;
2017-08-31, 10:30:30.0 Notice (6) Honoring MDD; IP provisioning mode = IPv6
2017-08-31, 10:29:59.0 Warning (5) MDD message timeout;
2017-08-31, 10:29:59.0 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;
2017-08-31, 10:29:59.0 Warning (5) MDD message timeout;
2017-08-31, 10:29:29.0 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;
2017-08-31, 10:29:29.0 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;
2017-08-31, 10:29:28.0 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;
2017-08-31, 10:29:10.0 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;
2017-08-31, 10:29:09.0 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;
2017-08-31, 10:29:02.0 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;
2017-08-31, 10:29:01.0 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;
2017-08-31, 10:28:49.0 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;
2017-08-31, 10:28:49.0 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;
2017-08-31, 10:28:06.0 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;
2017-08-31, 10:28:05.0 Warning (5) MDD message timeout;CM-MAC=b0:b9:8a:d7:db:00;CMTS-MAC=00:38:df:08:d5:5e;
2017-08-31, 10:28:04.0 Critical (3)

SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;

Frequent Visitor

Re: Netgear C7100V connectivity issues

Ken,

 

Signal table and error log post cable being buried. Currently - wireless is spotty - best I can explain it. While all connected devices seem to be working, there are bandwidth issues for sure. 

 

 

Official Employee

Re: Netgear C7100V connectivity issues

Hi mronut5988, 

 

I'm following up for Ken in regards to your internet issues. I agree I believe there's something going on with the line. I am not able to pull any levels on my end either. Is there a splitter somewhere on the line leading to the modem? 

Frequent Visitor

Re: Netgear C7100V connectivity issues

Hi - everything is straight line from outside box all the way to the jack. No splitters. And we changed out the outlet on the wall for safety sake. I also replaced the router with the exact same model - brand new. Here are the newest channel stats:

 

<tabindex=-1>Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 1 495000000 Hz 2.7 dBmV 41.0 dB 0 0
2 Locked QAM256 2 501000000 Hz 2.2 dBmV 40.7 dB 0 0
3 Locked QAM256 3 507000000 Hz 2.7 dBmV 39.3 dB 0 0
4 Locked QAM256 4 513000000 Hz 2.8 dBmV 40.9 dB 0 0
5 Locked QAM256 5 519000000 Hz 2.7 dBmV 40.8 dB 0 0
6 Locked QAM256 6 525000000 Hz 2.8 dBmV 40.6 dB 0 0
7 Locked QAM256 7 531000000 Hz 3.1 dBmV 40.7 dB 0 0
8 Locked QAM256 8 537000000 Hz 2.8 dBmV 40.6 dB 0 0
9 Locked QAM256 9 543000000 Hz 3.2 dBmV 40.7 dB 0 0
10 Locked QAM256 10 549000000 Hz 3.5 dBmV 40.9 dB 0 0
11 Locked QAM256 11 555000000 Hz 3.1 dBmV 40.6 dB 0 0
12 Locked QAM256 12 561000000 Hz 3.3 dBmV 40.0 dB 0 0
13 Locked QAM256 13 567000000 Hz 3.8 dBmV 40.6 dB 0 0
14 Locked QAM256 14 573000000 Hz 3.6 dBmV 40.6 dB 0 0
15 Locked QAM256 15 579000000 Hz 3.3 dBmV 40.3 dB 0 0
16 Locked QAM256 16 585000000 Hz 3.3 dBmV 40.3 dB 0 0
17 Locked QAM256 17 591000000 Hz 2.4 dBmV 41.9 dB 0 0
18 Locked QAM256 18 597000000 Hz 2.0 dBmV 41.4 dB 0 0
19 Locked QAM256 19 603000000 Hz 1.9 dBmV 41.3 dB 0 0
20 Locked QAM256 20 609000000 Hz 1.8 dBmV 41.4 dB 0 0
21 Locked QAM256 21 615000000 Hz 1.6 dBmV 41.3 dB 0 0
22 Locked QAM256 22 621000000 Hz 1.9 dBmV 41.4 dB 0 0
23 Locked QAM256 23 627000000 Hz 1.9 dBmV 41.4 dB 0 0
24 Locked QAM256 24 633000000 Hz 1.9 dBmV 41.4 dB 0 0

<tabindex=-1>Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 37800000 Hz 43.0 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 31150000 Hz 43.0 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 24500000 Hz 41.5 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 17850000 Hz 43.0 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
Diamond Problem Solver
Moved:

Re: Netgear C7100V connectivity issues

Frequent Visitor

Re: Netgear C7100V connectivity issues

New stats.

 

<tabindex=-1>Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 1 495000000 Hz 3.3 dBmV 41.0 dB 0 0
2 Locked QAM256 2 501000000 Hz 2.7 dBmV 40.7 dB 0 0
3 Locked QAM256 3 507000000 Hz 3.2 dBmV 39.5 dB 0 0
4 Locked QAM256 4 513000000 Hz 3.3 dBmV 40.8 dB 0 0
5 Locked QAM256 5 519000000 Hz 3.2 dBmV 40.6 dB 0 0
6 Locked QAM256 6 525000000 Hz 3.4 dBmV 40.6 dB 0 0
7 Locked QAM256 7 531000000 Hz 3.7 dBmV 40.7 dB 0 0
8 Locked QAM256 8 537000000 Hz 3.4 dBmV 40.5 dB 0 0
9 Locked QAM256 9 543000000 Hz 3.8 dBmV 40.7 dB 0 0
10 Locked QAM256 10 549000000 Hz 4.2 dBmV 40.8 dB 0 0
11 Locked QAM256 11 555000000 Hz 3.8 dBmV 40.6 dB 0 0
12 Locked QAM256 12 561000000 Hz 4.0 dBmV 40.0 dB 0 0
13 Locked QAM256 13 567000000 Hz 4.4 dBmV 40.4 dB 0 0
14 Locked QAM256 14 573000000 Hz 4.2 dBmV 40.5 dB 0 0
15 Locked QAM256 15 579000000 Hz 4.0 dBmV 40.3 dB 0 0
16 Locked QAM256 16 585000000 Hz 4.0 dBmV 40.3 dB 0 0
17 Locked QAM256 17 591000000 Hz 3.1 dBmV 41.8 dB 0 0
18 Locked QAM256 18 597000000 Hz 2.7 dBmV 41.4 dB 0 0
19 Locked QAM256 19 603000000 Hz 2.7 dBmV 41.4 dB 0 0
20 Locked QAM256 20 609000000 Hz 2.6 dBmV 41.5 dB 0 0
21 Locked QAM256 21 615000000 Hz 2.5 dBmV 41.4 dB 0 0
22 Locked QAM256 22 621000000 Hz 2.7 dBmV 41.4 dB 0 0
23 Locked QAM256 23 627000000 Hz 2.7 dBmV 41.4 dB 0 0
24 Locked QAM256 24 633000000 Hz 2.6 dBmV 41.6 dB 0 0

<tabindex=-1>Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 37800000 Hz 43.0 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 31150000 Hz 41.5 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 24500000 Hz 41.5 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 17850000 Hz 41.5 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
Frequent Visitor

Re: Netgear C7100V connectivity issues

I just rebooted so I dont have an event log. When I have one - will post. Issue still persists with new replacement router - devices connect happily, all's well and then slowly either the router throttles down or the devices get unhappy with IP routing or signal or something and lose connection. 

 

Two techs have come out but no advancement made in resolving issue.

 

Also contacted Netgear support - I am happy to post whatever they tell me.

 

 

Frequent Visitor

Re: Netgear C7100V connectivity issues

Netgear support wasn't much help. 

 

Yesterday - the internet went down as if being throttled - speeds on a speedtest indicated a slow down. Re-booted the router and immediately everything was back up to full speed and connectivity.

 

Error log indicates a DSID startup error - why do I keep seeing this?

 

2017-10-01, 21:02:04.0 Warning (5) Unicast DSID PSN startup error
2017-10-01, 20:48:41.0 Warning (5) Unicast DSID PSN startup error
Frequent Visitor

Re: Netgear C7100V connectivity issues

I just want to post back with resolution, for anyone else facing the same issues.

 

a) Comcast did everything they possibly could to help with issues - nothing worked to improve my connectivity issues.

b) Netgear support wasn't a whole lot of help - they asked me to change channels and set RTS threshold to a lower value - but after these two steps, the next one offered was to run the device in bridge mode. Which I do not want to do! I am not paying $299 for a device to run it in bridge mode so I can use another wifi router on top of it!

c) The solution to my issues - is that I replaced the Netgear 7100V with an Arris SVG2482AC. After initializing it with Comcast and setting up my wifi network, I have not had a single issue with speed nor signal strengths, no issues with multiple devices connected to it and no error logs or event logs that indicate an underlying issue. I read somewhere - maybe it was another thread on Comcast - about another person having similar issues with his 7100V due in part to it's ability to handle multiple devices connected to it. And I would think - given my example now - that 2 strikes make for an "out". I replaced my original Netgear with another brand new one and both of the routers exhibited the same EXACT issue. 

 

This post and thread, if someone were looking for it, should serve as notice to you, the customer - please do not purchase the Netgear C7100V nor rent it as a gateway from Comcast. It fails miserably as handling multiple devices (which is the norm in many a household now) and you will spend hours troubleshooting to no avail.

 

The Arris is not as good in it's web manager interface nor it's capabilities to provide for a secondary "guest" network, for example. But it does what it needs to do - set up, install, initialize and run a strong network right away. I spent too many days and hours and weekends working on getting the Netgear up and running - please do not waste your time doing so.

New Poster

Re: Netgear C7100V connectivity issues

Hi there mronut5988 and ComcastKenF etc., 

 

I am thinking to buy the Netgear C7100V. Was there ever any resolution for this issue? Would hate to spend $300 if this problem still exists with xfinity!

 

Thanks!