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sugoiben's avatar
sugoiben
New Contributor

Internet dropping intermittently

Over the last few weeks my internet connection has started dropping fairly often. And always at the most inopportune moments. I've included status and logs from my modem below. I think power levels and SNR levels look like they are ok. But still seeing the ranging errors in the log all the time.  When it gets bad the modem cycles up and down a dozen times or more. Other times, everything runs fine. Any insights from this, or do I need to get a Tech out to take a look?

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 777000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File Complete  
Security Enabled BPI+
Downstream Channel 0
Lock Status Locked Modulation 256 QAM
Channel ID 1 Symbol rate 5360537
Downstream Frequency 777000000 Hz Downstream Power -1.7858 dBmV
SNR 35.9730 dBmV Correctables 12
Uncorrectables 581    
Downstream Channel 1
Lock Status Locked Modulation 256 QAM
Channel ID 2 Symbol rate 5360537
Downstream Frequency 771000000 Hz Downstream Power -2.1553 dBmV
SNR 35.4178 dBmV Correctables 0
Uncorrectables 545    
Downstream Channel 2
Lock Status Locked Modulation 256 QAM
Channel ID 3 Symbol rate 5360537
Downstream Frequency 783000000 Hz Downstream Power -1.5641 dBmV
SNR 35.9730 dBmV Correctables 0
Uncorrectables 633    
Downstream Channel 3
Lock Status Locked Modulation 256 QAM
Channel ID 4 Symbol rate 5360537
Downstream Frequency 789000000 Hz Downstream Power -0.6169 dBmV
SNR 36.3869 dBmV Correctables 0
Uncorrectables 545    
Upstream Channel 0
Lock Status Locked Modulation 64QAM
Channel ID 3 Symbol rate 5120 Ksym/sec
Upstream Frequency 26000000 Hz Upstream Power 46.0000 dBmV
Upstream Channel 1
Lock Status Locked Modulation 64QAM
Channel ID 1 Symbol rate 2560 Ksym/sec
Upstream Frequency 17800000 Hz Upstream Power 46.0000 dBmV
Upstream Channel 2
Lock Status Locked Modulation 64QAM
Channel ID 2 Symbol rate 2560 Ksym/sec
Upstream Frequency 21100000 Hz Upstream Power 46.0000 dBmV
Upstream Channel 3
Lock Status Locked Modulation 64QAM
Channel ID 4 Symbol rate 5120 Ksym/sec
Upstream Frequency 32500000 Hz Upstream Power 48.0000 dBmV
Time Priority Description
 Time Not Established   Critical (3)   Unicast Ranging Received Abort Response - initializing MAC;CM... 
 Time Not Established   Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=
 Time Not Established   Critical (3)   Unicast Ranging Received Abort Response - initializing MAC;CM... 
 Time Not Established   Critical (3)   No Ranging Response received - T3 time-out;CM-MAC= 
 Time Not Established   Critical (3)   Unicast Ranging Received Abort Response - initializing MAC;CM... 
 Time Not Established   Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=
 Time Not Established   Critical (3)   Unicast Ranging Received Abort Response - initializing MAC;CM... 
 Time Not Established   Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=
 Time Not Established   Critical (3)   Unicast Ranging Received Abort Response - initializing MAC;CM... 
 Time Not Established   Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=
 Time Not Established   Critical (3)   Unicast Ranging Received Abort Response - initializing MAC;CM... 
 Time Not Established   Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=
 Time Not Established   Critical (3)   Unicast Ranging Received Abort Response - initializing MAC;CM... 
 Time Not Established   Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=
 Sun Sep 18 11:08:10 2016    Warning (5)   MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=... 
 Sun Sep 18 11:08:10 2016    Notice (6)   TLV-11 - unrecognized OID;CM-MAC=;CMTS-MAC=5... 
 Sun Sep 18 11:16:36 2016    Critical (3)   No Ranging Response received - T3 time-out;CM-MAC= 
 Sun Sep 18 11:16:36 2016    Critical (3)   Ranging Request Retries exhausted;CM-MAC=;CM... 
 Sun Sep 18 11:16:36 2016    Critical (3)   Unicast Maintenance Ranging attempted - No response - Retries... 
 Sun Sep 18 11:16:45 2016    Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=
 Sun Sep 18 11:16:45 2016    Critical (3)   Ranging Request Retries exhausted;CM-MAC=;CM... 
 Sun Sep 18 11:16:45 2016    Critical (3)   Unicast Maintenance Ranging attempted - No response - Retries... 
 Sun Sep 18 11:16:51 2016    Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=
 Sun Sep 18 11:16:51 2016    Critical (3)   Ranging Request Retries exhausted;CM-MAC=;CM... 
 Sun Sep 18 11:16:51 2016    Critical (3)   Unicast Maintenance Ranging attempted - No response - Retries... 
 Sun Sep 18 11:17:19 2016    Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=
 Sun Sep 18 11:17:25 2016    Warning (5)   MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=... 
 Sun Sep 18 11:17:25 2016    Notice (6)   TLV-11 - unrecognized OID;CM-MAC=;CMTS-MAC=5... 
 Sun Sep 18 11:19:38 2016    Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=
 Sun Sep 18 11:19:38 2016    Critical (3)   Ranging Request Retries exhausted;CM-MAC=;CM... 
 Sun Sep 18 11:19:38 2016    Critical (3)   Unicast Maintenance Ranging attempted - No response - Retries... 
 Sun Sep 18 11:19:46 2016    Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=
 Sun Sep 18 11:19:47 2016    Critical (3)   Ranging Request Retries exhausted;CM-MAC=;CM... 
 Sun Sep 18 11:19:47 2016    Critical (3)   Unicast Maintenance Ranging attempted - No response - Retries... 
 Sun Sep 18 11:19:53 2016    Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=
 Sun Sep 18 11:19:53 2016    Critical (3)   Ranging Request Retries exhausted;CM-MAC=;CM... 
 Sun Sep 18 11:19:53 2016    Critical (3)   Unicast Maintenance Ranging attempted - No response - Retries... 
 Sun Sep 18 11:20:15 2016    Critical (3)   No Ranging Response received - T3 time-out;CM-MAC=
 Sun Sep 18 11:20:27 2016    Warning (5)   MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=... 
 Sun Sep 18 11:20:27 2016    Notice (6)   TLV-11 - unrecognized OID;CM-MAC=;CMTS-MAC=5... 

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  • ChrisL's avatar
    ChrisL
    Former Moderator
    @sugoiben

    The T3 events suggest that the upstream connection is being lost somehow. Are there any cable splitters you can bypass and see if that improves things?

  • sugoiben's avatar
    sugoiben
    New Contributor

    There are no splitters used. Line comes direct from the cox box outside to the modem.

  • BrianM's avatar
    BrianM
    Moderator
    It sounds like we may need to have a technician out to check into this further for you. Email us at Cox.Help@Cox.com with a link to this thread and we can setup a service call for you.

    Brian
    Cox Support Forums Moderator