T3 disconnects with SB6141, requires modem reboot frequently

Question

Hello-
I have been having an issue in the last week where my modem needs to be unplugged and plugged back in due to internet failing approximately every 30 minutes (while using it).
I am in Orange County, and using the Arris SB6141 modem.&nbsp; The log shows "T3 time-out" right before failure.
Logs below - any ideas on this?&nbsp; Past posts here suggest its a cox problem with the signal.
Dec 04 2016 13:32:33

6-Notice
I401.0
TLV-11 - unrecognized OID;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 13:32:33
5-Warning
Z00.0
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:00:30
3-Critical
R02.0
No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:00:15
6-Notice
N/A
Cable Modem Reboot due to power reset ;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 13:31:02
3-Critical
R02.0
No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 13:30:18
3-Critical
R06.0
Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 13:30:18
3-Critical
R03.0
Ranging Request Retries exhausted;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 13:30:16
3-Critical
R02.0
No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 13:30:03
3-Critical
R06.0
Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 13:30:03
3-Critical
R03.0
Ranging Request Retries exhausted;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 13:30:02
3-Critical
R02.0
No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 12:50:00
6-Notice
I401.0
TLV-11 - unrecognized OID;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 12:50:00
5-Warning
Z00.0
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:00:34
3-Critical
R02.0
No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:00:15
6-Notice
N/A
Cable Modem Reboot due to power reset ;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 12:48:40
3-Critical
R02.0
No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 12:48:40
3-Critical
R07.0
Unicast Ranging Received Abort Response - initializing MAC;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 12:48:39
3-Critical
R02.0
No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 12:47:26
3-Critical
R07.0
Unicast Ranging Received Abort Response - initializing MAC;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Dec 04 2016 12:47:20
3-Critical
R06.0
Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

Signal:
Downstream

Bonding Channel Value

Channel ID
46&nbsp;
41&nbsp;
42&nbsp;
43&nbsp;
44&nbsp;
45&nbsp;
47&nbsp;
48&nbsp;

Frequency
909000000 Hz&nbsp;
879000000 Hz&nbsp;
885000000 Hz&nbsp;
891000000 Hz&nbsp;
897000000 Hz&nbsp;
903000000 Hz&nbsp;
915000000 Hz&nbsp;
921000000 Hz&nbsp;

Signal to Noise Ratio
37 dB&nbsp;
38 dB&nbsp;
38 dB&nbsp;
38 dB&nbsp;
38 dB&nbsp;
38 dB&nbsp;
38 dB&nbsp;
38 dB&nbsp;

Downstream Modulation
QAM256&nbsp;
QAM256&nbsp;
QAM256&nbsp;
QAM256&nbsp;
QAM256&nbsp;
QAM256&nbsp;
QAM256&nbsp;
QAM256&nbsp;

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

-2 dBmV &nbsp;
-1 dBmV &nbsp;
-2 dBmV &nbsp;
-2 dBmV &nbsp;
-2 dBmV &nbsp;
-2 dBmV &nbsp;
-3 dBmV &nbsp;

-3 dBmV &nbsp;

Upstream

Bonding Channel Value

Channel ID
1&nbsp;
2&nbsp;
3&nbsp;
4&nbsp;

Frequency
17600000 Hz&nbsp;
24000000 Hz&nbsp;
30400000 Hz&nbsp;
36800000 Hz&nbsp;

Ranging Service ID
132&nbsp;
132&nbsp;
132&nbsp;
132&nbsp;

Symbol Rate
2.560 Msym/sec&nbsp;
5.120 Msym/sec&nbsp;
5.120 Msym/sec&nbsp;
5.120 Msym/sec&nbsp;

Power Level
36 dBmV&nbsp;
38 dBmV&nbsp;
39 dBmV&nbsp;
40 dBmV&nbsp;

Upstream Modulation
[3] QPSK [2] 16QAM [3] 64QAM &nbsp;
[3] 16QAM [3] 64QAM &nbsp;
[3] 16QAM [3] 64QAM &nbsp;
[3] 16QAM [3] 64QAM &nbsp;

Ranging Status
Success&nbsp;
Success&nbsp;
Success&nbsp;
Success&nbsp;

Thanks!

chrisl · Answer

@Matt_C

The modem should recover from a T3 event on it's own either by the event passing or the modem rebooting itself due to lost sync.  You may wan to test without the router just to make sure the manual reboot isn't correcting some other issue however if the issue continues this would suggest either a signal or modem issue.

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T3 disconnects with SB6141, requires modem reboot frequently

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	6-Notice	I401.0	TLV-11 - unrecognized OID;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 13:32:33	5-Warning	Z00.0	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:30	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:15	6-Notice	N/A	Cable Modem Reboot due to power reset ;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 13:31:02	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 13:30:18	3-Critical	R06.0	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 13:30:18	3-Critical	R03.0	Ranging Request Retries exhausted;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 13:30:16	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 13:30:03	3-Critical	R06.0	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 13:30:03	3-Critical	R03.0	Ranging Request Retries exhausted;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 13:30:02	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 12:50:00	6-Notice	I401.0	TLV-11 - unrecognized OID;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 12:50:00	5-Warning	Z00.0	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:34	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:15	6-Notice	N/A	Cable Modem Reboot due to power reset ;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 12:48:40	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 12:48:40	3-Critical	R07.0	Unicast Ranging Received Abort Response - initializing MAC;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 12:48:39	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 12:47:26	3-Critical	R07.0	Unicast Ranging Received Abort Response - initializing MAC;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;
Dec 04 2016 12:47:20	3-Critical	R06.0	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=84:61:a0:7e:c2:ec;CMTS-MAC=00:24:14:64:09:61;CM-QOS=1.1;CM-VER=3.0;

	Bonding Channel Value
Channel ID	1	2	3	4
Frequency	17600000 Hz	24000000 Hz	30400000 Hz	36800000 Hz
Ranging Service ID	132	132	132	132
Symbol Rate	2.560 Msym/sec	5.120 Msym/sec	5.120 Msym/sec	5.120 Msym/sec
Power Level	36 dBmV	38 dBmV	39 dBmV	40 dBmV
Upstream Modulation	[3] QPSK [2] 16QAM [3] 64QAM	[3] 16QAM [3] 64QAM	[3] 16QAM [3] 64QAM	[3] 16QAM [3] 64QAM
Ranging Status	Success	Success	Success	Success