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Forum Discussion
C7100V on Xfinity with connection isues timeout and resets? Replacemenr modem too!
Purchased C7100V Cable modem/ router for Comcast?Xifinity internet and voice. Previouly had a C6300 that flawlesly. Comcast made me purchase the C7100V becaue I had voice plan. Ever since connecting the C7100V I had intermitent internet and voice loss. If veiwing modem i first loss the 2.4ghz network then the 5 ghz the DS/US light blinks and then the Online light goes out. The entire resets and I can finnaly connect 3-4 minutes later. Had Comcast/xfinity onite twice checked the entire cable lines. My line are brand new cooected directly to hub outide my house!
After second visit I purchased another C7100V modem and it did the EXACT same thing!
Comcast came back onsite called his supervisor and said this is a known issue with this modem!! The firmware needs to be updated?? but Comcast needs to release the firmware? Comcast replacement modem working perfectly!!
Tried contacting Netgear tech support for help but got zero help. I just waited for 45 minute and was sent KB artice to change wireless signal!! Waited again for 50 minute and got disconnected!!
Attached event log file?
25 Replies
I contacted support again early this morning 7am est. They still suggested that I try ANOTHER modem. Sent mine in to get swapped with another. Hopefully the third time is a charm?
I will update the forum once I get the replacement back.
Sorry for the typos I was posting while on hold with Netgear. using spellcheck now!
New replacement RMA modem was supposed arrive yesterday but FedEx says the label got damaged and delivery is Monday. Also Comcast/Xfinity CHARGED me $40 for home service visit to troubleshoot and diagnose the problem after I orginally confirmed it wasn't going to be charged. I'll see what happens tomorrow?
- your line has too many T3 timeouts and it will lead to unstable connection.
- can you please post your connection table from the device? If the powers are bad, then you need Comcast to fix the issue.
Comcast/Xfinity was onsite 3 separate visits to check the Brand new cable connection to my home. Comcast just completed a 1 million dollar project to have cable ran to my rural neighborhood. This persistence from Netgear to blame Comcast cost me $40 for home service visit. The replacement modem from Comcast until I reconnect the Netgear has worked flawlessly!!
I just received the replacement from Netgear and will work on reinstalling by end of day hopefully the THIRD modem works??
Frequency start Value This 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. Starting Frequency <tabindex=-1>Startup Procedure Procedure Status Comment Acquire Downstream Channel 483000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Configuration File OK ------------ Security Enable BPI+ <tabindex=-1>Downstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 Locked QAM256 2 483000000 Hz 5.5 dBmV 41.9 dB 0 0 2 Locked QAM256 1 477000000 Hz 5.5 dBmV 41.9 dB 0 0 3 Locked QAM256 3 489000000 Hz 5.4 dBmV 41.9 dB 0 0 4 Locked QAM256 4 495000000 Hz 5.3 dBmV 41.3 dB 0 0 5 Locked QAM256 5 519000000 Hz 5.4 dBmV 41.2 dB 0 0 6 Locked QAM256 7 531000000 Hz 5.5 dBmV 41.6 dB 0 0 7 Locked QAM256 8 537000000 Hz 5.4 dBmV 41.3 dB 0 0 8 Locked QAM256 11 555000000 Hz 5.3 dBmV 40.9 dB 0 0 9 Locked QAM256 12 561000000 Hz 5.4 dBmV 40.5 dB 0 0 10 Locked QAM256 14 573000000 Hz 5.1 dBmV 40.7 dB 0 0 11 Locked QAM256 15 579000000 Hz 5.3 dBmV 40.7 dB 0 0 12 Locked QAM256 16 585000000 Hz 5.3 dBmV 40.6 dB 0 0 13 Locked QAM256 17 591000000 Hz 5.4 dBmV 40.6 dB 0 0 14 Locked QAM256 18 597000000 Hz 5.4 dBmV 40.6 dB 0 0 15 Locked QAM256 19 603000000 Hz 5.5 dBmV 40.5 dB 0 0 16 Locked QAM256 20 609000000 Hz 5.6 dBmV 40.4 dB 0 0 17 Locked QAM256 21 615000000 Hz 5.5 dBmV 41.4 dB 0 0 18 Locked QAM256 22 621000000 Hz 5.5 dBmV 41.4 dB 0 0 19 Locked QAM256 23 627000000 Hz 5.7 dBmV 41.4 dB 0 0 20 Locked QAM256 24 633000000 Hz 5.8 dBmV 41.5 dB 0 0 21 Locked QAM256 25 639000000 Hz 6.0 dBmV 41.4 dB 0 0 22 Locked QAM256 26 645000000 Hz 6.1 dBmV 41.4 dB 0 0 23 Locked QAM256 27 651000000 Hz 6.0 dBmV 41.4 dB 0 0 24 Locked QAM256 28 657000000 Hz 5.8 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 2 5120 Ksym/sec 23700000 Hz 49.8 dBmV 2 Locked ATDMA 3 5120 Ksym/sec 30100000 Hz 50.0 dBmV 3 Locked ATDMA 4 5120 Ksym/sec 36500000 Hz 49.5 dBmV 4 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 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
After tiring with the rental that I had from Comcast, I started my research and based on having Triple Play and the area I am in, I had one choice. The Netgear C7100V Nighthawk Wifi Cable Modem Router.
I had issues since day 1, but up until a few weeks ago I couldn't really blame the device since I also set up a home network that consisted of three additional Wifi routers that I was using as 'hotspots' and also to use them to provide wired connections in various parts of the house.
So I finally got things 'clean up', reset all of my hardware to default and I was cruising along for a while with the NightHawk being the 'main' device, i.e. providing DCHP services.
However, I will eventually get the call from one of my family members that 'the Wifi is down' and when I make it home, there is my NightHawk with the 'Tel 1' line blinking. I have to do a hard restart and then things usually work. As others have mentioned, this usually only last for at most a week?
I do have the latest firmware and I also took the plunge and had a 'surge protector' for the house installed. (That was for other reasons, but side note, it was well worth it.)
I also went through the blame game between Comcast and Netgear, but now my warranty is up and i would have to pay to get Netgear involved.
So I am sorry that I have not found a solution yet, but I did want to let everyone know that there are those that have the new firmware, but still have what seems to be the same issues. I have not taken the time to look at the event log since the reboot is usually pretty quick and after being in the I/T business for over 25 years, I guess I have developed a level of 'don't really care if a reboot works' mentality.
Looking forward on hearing if anyone actually figures out a solution, but after reading this thread it doesn't look promising.
Take care.
I just reread my post. Sorry for the grammatical errors and also wanted to mention already that I know it is DHCP. :-)
Again, just got home, still in work clothes and family wanting WiFi. Just the Valentine's Day I have always dreamed of....
I have same issue. My internet is very slow. I rented comcast modem for couple of months and it worked without any issue.
I really hate that I have to go through ISP for firmware. I wish i know it before. Now, I can't return it either
also, my firmware vesion is 2.01.40 and netgear kb says the latest is V2.01.37. Either netgear website is not updated or comcast is screwing up with wrong firmware.These are the things i hate. I want to have control, that is the reason to but my own modem.
