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agarg1's avatar
agarg1
Aspirant
Dec 01, 2015

Very Slow (almost zero) Internet Connectivity - Netgear C3700 TWC - Austin, TX

Hi,

 

I have a new C3700 Netgear Cable Modem Router with TWC Extreme Internet here in Austin, TX (78717) and everything worked great for about 2 months.  However, now I am not able to access Internet as the connection is really slow since the past 2 weeks. I have been on numerous calls with TWC support but they have not been able to help.  The TWC technician came to our apartment and checked the cable and everything looks great.  He plugged the TWC modem/router and it worked fine.  Somehow it just seems to be an issue when I am using my own Netgear C3700 Modem/Router.  I'll appreciate if somone can provide a resolution. Thank you.

 

Here are the cable connection settings and Event Logs

 

Hardware VersionC279T00-01
 
Firmware VersionV1.01.11

 

 
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
ProcedureStatusComment
Acquire Downstream Channel591000000 HzLocked
Connectivity StateOKOperational
Boot State  
Configuration File  
SecurityEnabledBPI+
Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1 QAM256 591000000 Hz10.2 dBmV41.9 dB00
2 QAM256 573000000 Hz10 dBmV41.3 dB00
3 QAM256 579000000 Hz10.2 dBmV41.3 dB00
4 QAM256 585000000 Hz10.1 dBmV41.4 dB00
5 QAM256 567000000 Hz10.4 dBmV41.4 dB00
6 QAM256 507000000 Hz11.6 dBmV41.9 dB00
7 QAM256 513000000 Hz11.3 dBmV42 dB00
8 QAM256 519000000 Hz11.1 dBmV41.5 dB00
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1 ATDMA 5120 Ksym/sec24200000 Hz36 dBmV
2 TDMA 2560 Ksym/sec19400000 Hz36 dBmV
3 ATDMA 5120 Ksym/sec30600000 Hz36 dBmV
4 ATDMA 2560 Ksym/sec37000000 Hz36 dBmV
Current System Time: Mon Nov 30 21:09:37 2015


System Up Time      01:27:38
PortStatusTxPktsRxPktsCollisionsTx B/sRx B/sUp Time
WANLink Up10852714100372274901:26:49
LAN1Link Down00000--
LAN2Link Down--
WLAN/2.4G300M737947150450569900:15:15
WLAN/5G300M14924218102408201:27:38

 

 

Event Log

TimePriorityDescription
1970-1-1, 00:00:31.0Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=50:6a:03:7e:8d:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:34.0Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=50:6a:03:7e:8d:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2015-11-30, 20:45:00.0Critical (3) Resetting the cable modem due to docsDevResetNow
1970-1-1, 00:00:32.0Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=50:6a:03:7e:8d:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:34.0Notice (6) WiFi Interface [wl0] set to Channel 11 (Side-Band Channel:N/A) - Reason:INIT
1970-1-1, 00:00:35.0Notice (6) WiFi Interface [wl1] set to Channel 153 (Side-Band Channel:149) - Reason:INIT
1970-1-1, 00:00:39.0Notice (6) Honoring MDD; IP provisioning mode = IPv4
1970-1-1, 00:00:41.0Warning (5) DHCP WARNING - Non-critical field invalid in response ;CM-MAC=50:6a:03:7e:8d:68;CMTS-MAC=00:17:10:86:ab:9d;CM-QOS=1.0;CM-VER=3.0;
2015-11-30, 20:46:00.0Error (4) Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=50:6a:03:7e:8d:68;CMTS-MAC=00:17:10:86:ab:9d;CM-QOS=1.1;CM-VER=3.0;
2015-11-30, 20:46:00.0Error (4) Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=50:6a:03:7e:8d:68;CMTS-MAC=00:17:10:86:ab:9d;CM-QOS=1.1;CM-VER=3.0;
 
 
Hardware
Troubleshooting

3 Replies

  • agarg1's avatar
    agarg1
    Aspirant
    Dec 04, 2015

    Hi,

     

    Any feedback, anyone? Again, the connection strength is excellent but only a couple of websites load. I am able to load Yahoo and anything related to Yahoo (Yahoo Finance, Movies, etc). However, if I try to load Amazon, CNN, Speedtest.net etc. a page not found error is displayed. Can it be related to DNS setting? DNS and Internet IP Addresses are configured to get automatically/dynamically from ISP.

     

    Thank You.

    • agarg1's avatar
      agarg1
      Aspirant
      Dec 05, 2015

      I have some new insight to share. I enabled the guest network option on the Netgear router setup page, connected to the guest network wirelessly and everything started working fine. Got download speeds of 50mbps.

      So the guest network works but the actual secured wireless network doesn't. Any suggestions what might be causing that?

      Thank you.

      • DarrenM's avatar
        DarrenM
        Sr. NETGEAR Moderator
        Dec 10, 2015

        Hello agarg1

         

        Have you tried to clear the saved wireless networks from your device and then reconnect to the router see if that works. You could also try changing the SSID and password on the router check if anything changes there if that does not work I would suggest to do a factory reset and try again. Hope to hear your feedback. 

         

        DarrenM