Horribly slow internet with SB6121 - Time Warner Internet

#1
This question is about "Horribly slow internet with SB6121", with Time Warner Cable internet and apps. For the last couple of days, my TWC internet has been horribly slow and dropping in and out. Prior to that, I was experiencing internet drops every 2-3 hours; it had been annoying but didnt affect me enough to ever call TWC until today. I called but received little help aside from proving that the problem is not my router or my wifi. I still experience very slow internet connected directly to the modem.

The modem is a SB6121 that i bought myself to bypass the monthly charges from TWC for modem rental. Here are the specs:

Model Name: SB6121
Vendor Name: Motorola
Firmware Name: SB_KOMODO-1.0.6.16-SCM00-NOSH
Boot Version: PSPU-Boot(25CLK) 1.0.12.18m3
Hardware Version: 5.0
Serial Number: 398079425544433401012019
Firmware Build Time: Feb 16 2016 11:28:04

Something i noticed that i found odd is that the firmware the modem is using does not match up with the recommended SB6121 firmware on TWCs own website (https://www.timewarnercable.com/en/support/internet/topics/lease-or-buy-modem.html). They say that a SB6121 should be using firmware "1.0.6.8-SCM01". The firmware my modem is running appears to be the SB6120 firmware for some reason. I asked the TWC call center rep about this but was told that TWC cannot update this firmware and that i needed to call Motorola tech support to get the firmware updated (pretty sure this is BS). I know for a fact that new firmware was pushed to this modem sometime in the past 2-3 months because the UI changed on the modem web page - there used to be a button on the page i could use to reset the modem remotely from my PC; that button is now gone.

Here is the rest of my modem info:

Downstream Bonding Channel Value
Channel ID 1 3 4 6
Frequency 675000000 Hz 687000000 Hz 693000000 Hz 705000000 Hz
Signal to Noise Ratio 37 dB 38 dB 38 dB 39 dB
Downstream Modulation QAM256 QAM256 QAM256 QAM256
Power Level
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
5 dBmV 6 dBmV 6 dBmV 6 dBmV
Upstream Bonding Channel Value
Channel ID 5 6 7 8
Frequency 19400000 Hz 24200000 Hz 30600000 Hz 37000000 Hz
Ranging Service ID 12460 12460 12460 12460
Symbol Rate 2.560 Msym/sec 5.120 Msym/sec 5.120 Msym/sec 2.560 Msym/sec
Power Level 42 dBmV 43 dBmV 44 dBmV 44 dBmV
Upstream Modulation [3] QPSK
[2] 16QAM
[3] QPSK
[3] 16QAM
[3] QPSK
[3] 16QAM
[3] QPSK
[3] 16QAM

Ranging Status Success Success Success Success
Signal Stats (Codewords) Bonding Channel Value
Channel ID 1 3 4 6
Total Unerrored Codewords 14010102 13157329 13157507 13157596
Total Correctable Codewords 13 0 0 0
Total Uncorrectable Codewords 675 509 496 555


Time Priority Code Message
Jan 07 2017 14:16:53 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 07 2017 14:16:53 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 07 2017 14:16:53 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:14 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Jan 07 2017 13:45:18 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 07 2017 13:45:18 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:13 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:20 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:14 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Jan 07 2017 13:36:21 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 07 2017 13:36:21 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 07 2017 13:36:21 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:19 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:13 6-Notice N/A Cable Modem Reboot due to IP loss ;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 07 2017 13:16:59 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 07 2017 13:16:59 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:13 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Jan 06 2017 17:11:43 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 06 2017 17:11:43 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;
Jan 06 2017 17:11:43 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=94:62:69:f0:3d:8d;CMTS-MAC=00:01:5c:3c:60:42;CM-QOS=1.1;CM-VER=3.0;

Sorry for any poor formatting, i am writing this post on my phone



This topic covered Horribly slow internet with SB6121, and TWC cable internet service.
 
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