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scloer's avatar
scloer
Follower
Mar 20, 2019

C7000v2 Disconnects from Cable Internet Consistently

I am trying to determine why my internet is constantly disconnecting. I always maintain good signal strength to the WiFi, but I lose internet connection anywhere from 10-20 times per day. Can any information be ascertained from the following? 

 

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
 
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 819000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+
IP Provisioning Mode IPv6 Only ipv6Only(1)
 
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 25 819000000 Hz -7.4 dBmV 37.1 dB 315 401
2 Locked QAM256 2 681000000 Hz -4.2 dBmV 39.4 dB 484 671
3 Locked QAM256 9 723000000 Hz -5.5 dBmV 39.1 dB 524 1054
4 Locked QAM256 10 729000000 Hz -5.9 dBmV 38.7 dB 537 494
5 Locked QAM256 12 741000000 Hz -6 dBmV 38.5 dB 441 793
6 Locked QAM256 13 747000000 Hz -6.2 dBmV 38 dB 13192 18342
7 Locked QAM256 14 753000000 Hz -5.9 dBmV 37.5 dB 15612 39859
8 Locked QAM256 15 759000000 Hz -6.7 dBmV 37.6 dB 435 797
9 Locked QAM256 16 765000000 Hz -6.5 dBmV 37.8 dB 426 725
10 Locked QAM256 17 771000000 Hz -6.5 dBmV 38 dB 460 641
11 Locked QAM256 18 777000000 Hz -6.8 dBmV 37.8 dB 391 551
12 Locked QAM256 19 783000000 Hz -6.6 dBmV 38.1 dB 373 458
13 Locked QAM256 20 789000000 Hz -6.9 dBmV 37.8 dB 407 492
14 Locked QAM256 21 795000000 Hz -7.3 dBmV 37.5 dB 475 435
15 Locked QAM256 22 801000000 Hz -6.9 dBmV 37.6 dB 348 216
16 Locked QAM256 23 807000000 Hz -7.4 dBmV 37.3 dB 321 439
17 Locked QAM256 24 813000000 Hz -7.8 dBmV 36.5 dB 0 0
18 Locked QAM256 26 825000000 Hz -8.2 dBmV 36 dB 0 0
19 Locked QAM256 27 831000000 Hz -8.2 dBmV 35.9 dB 0 0
20 Locked QAM256 28 837000000 Hz -8.3 dBmV 35.6 dB 0 0
21 Locked QAM256 29 843000000 Hz -8.5 dBmV 35.3 dB 0 0
22 Locked QAM256 30 849000000 Hz -8.7 dBmV 35.3 dB 0 0
23 Locked QAM256 31 855000000 Hz -9.3 dBmV 34.6 dB 0 0
24 Locked QAM256 32 861000000 Hz -9.6 dBmV 34.3 dB 0 0
 
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 21 5120 Ksym/sec 17800000 Hz 42.7 dBmV
2 Locked ATDMA 22 5120 Ksym/sec 24200000 Hz 44.3 dBmV
3 Locked ATDMA 23 5120 Ksym/sec 30600000 Hz 45.3 dBmV
4 Locked ATDMA 24 5120 Ksym/sec 37000000 Hz 46.8 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

3 Replies

  • DarrenM's avatar
    DarrenM
    Sr. NETGEAR Moderator
    Apr 02, 2019

    Are you seeing many T3 or T4 timeouts in your modems logs?

     

    DarrenM

    • ericologist's avatar
      ericologist
      Aspirant
      Jul 08, 2019
      How do I discern it's a t3/t4 disconnect? I found the log you speak of, and I see multiple disconnects, but I'm not sure what exactly you mean.
      I found another issue in the forums dealing with mtu settings, which, according to the solution provided, I optimized, but that hasn't seemed to help. I even switched wireless channels to avoid any outside variables interfering.
  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User
    Jul 09, 2019

    Ensure no coax line splitters are in between the modem and ISP service box. 

    Ensure good RG6 coax cable is being used. 

    Have the ISP check the signal quality up to the modem. 

    Factory rest the modem and setup from scratch and review the logs for any disconnects or problems seen at the time of the disconnect.