Losing cable modem connectivity

[dk4dk4]

Frequently losing internet connectivity at the cable modem (cogeco).
modem will randomly reboot and reconnect to cogeco network.

Cable Signal Details (192.168.100.1):

Forward Path:
Signal Acquired at 453 MHz
SNR: 38.8 dB
Received Signal Strength: 10.4 dBmV
Bit Error Rate: 0.001%
Modulation: 256 QAM

Return Path:
Connection: Acquired
Frequency: 35.3 MHz
Power Level: 43.2 dBmV
Channel ID: 5
Modulation: 16 QAM

 

[corroded]

Are you directly connected? You should not be... Use a router.

 

[boosted1g]

Look at your logs and see what errors you are getting.
Are you getting any T3 or T4 timout errors?

That 10.4 dbm is on the edge of most ISPs power range which should be -7 to 7 or -10 to 10.

 

[dk4dk4]

Cable modem was just recently swapped out for a brand new one. Problem continues.

Sample from the log:
Fri Sep 05 08:57:10 2014 Notice (6) TLV-11 - unrecognized OID
Fri Sep 05 08:57:09 2014 Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Fri Sep 05 01:05:40 2014 Critical (3) DHCP WARNING - Non-critical field invalid in response.
Fri Sep 05 01:05:25 2014 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...
Fri Sep 05 01:04:53 2014 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Thu Sep 04 22:54:33 2014 Critical (3) DHCP WARNING - Non-critical field invalid in response.
Thu Sep 04 22:54:07 2014 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...
Thu Sep 04 22:53:35 2014 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Thu Sep 04 22:53:21 2014 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Thu Sep 04 22:53:20 2014 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Wed Sep 03 14:19:56 2014 Critical (3) No Ranging Response received - T3 time-out
Mon Sep 01 09:56:13 2014 Critical (3) DHCP WARNING - Non-critical field invalid in response.
Mon Sep 01 09:55:48 2014 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Mon Sep 01 09:55:35 2014 Critical (3) No Ranging Response received - T3 time-out