Basic Internet Connectivity And Modem Help

[lop105]

Wireless gateway SBG6850 drops internet connection for several minutes and then automatically reboots.

What does the SNMP event log from the gateway tell me?  There seems to be many critical errors.

Thu Apr 0522:07:312012    Notice (6)   TLV-11 - unrecognized OID;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

 Thu Apr 0517:18:142012    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

 Tue Apr 0319:20:432012    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

 Sun Apr 0105:28:452012    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

 Fri Mar 3022:12:502012    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

 Wed Mar 2818:07:452012    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

 Mon Mar 2612:15:412012    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

 Sun Mar 2501:56:382012    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

 Fri Mar 2316:51:332012    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

 Tue Mar 2021:18:302012    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

 Tue Mar 2018:36:112012    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

 Sun Mar 1823:46:292012    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

 Sun Mar 1811:02:302012    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

 Sun Mar 18 00:03:152012    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=1c:14:48:b2:c4:d3;CMTS-MAC=00:01:5c:32:31:88;CM-QOS=1.1;CM-VER=3.0; 

[UHFhd]

 that modem sbg6850 is not in the  list of comcast approved modems .

                        http://mydeviceinfo.comcast.net/              

 there is older version of that gateway device listed here with a long list of problems .

http://forums.comcast.com/t5/Connectivity-and-Modem-Help/Intermittent-drops-Motorola-sbg6580/m-p/112...

[i-am-nerdburg]

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lop105 wrote:

Wireless gateway SBG6850 drops internet connection for several minutes and then automatically reboots.

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Have you seen this thread? http://forums.comcast.com/t5/Connectivity-and-Modem-Help/Intermittent-drops-Motorola-sbg6580/m-p/112...

Your gateway has a firmware issue. Comcast is aware of the problem and is working on a solution.

[ComcastLarry]

lop105-

Sorry for the inconvience, as you can read from the helpful information that was posted we are working on resolving this issue.

[lop105]

I mis-typed the gateway model.  It should be SBG6580 which is a supported modem.