Visitor
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11 Messages
SB6183 randomly reboot
My SB6183 randomly reboots from time to time and seems to get more frequent recently. Any help will be greatly appreciated. Here's the log for the most recent event:
| Time Not Established | Critical (3) | No Ranging Response received - T3 time-out |
| Thu Jul 06 06:54:04 2023 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[xxxx];CMTS-MAC=[xxxx];CM-QOS=1.1;CM-VER=3.0; |
| Thu Jul 06 06:54:36 2023 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[xxxx];CMTS-MAC=[xxxx];CM-QOS=1.1;CM-VER=3.0; |
| Time Not Established | Notice (6) | Honoring MDD; IP provisioning mode = IPv6 |
| Time Not Established | Warning (5) | ToD request sent - No Response received;CM-MAC=[xxxx];CMTS-MAC=[xxxx];CM-QOS=1.0;CM-VER=3.0; |
| Thu Jul 06 06:55:16 2023 | Critical (3) | No Ranging Response received - T3 time-out |
| Thu Jul 06 06:55:17 2023 | Critical (3) | Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=[xxxx];CMTS-MAC=[xxxx];CM-QOS=1.1;CM-VER=3.0; |
| Thu Jul 06 06:55:17 2023 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[xxxx];CMTS-MAC=[xxxx];CM-QOS=1.1;CM-VER=3.0; |
| Thu Jul 06 06:55:50 2023 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[xxxx];CMTS-MAC=[xxxx];CM-QOS=1.1;CM-VER=3.0; |
| Thu Jul 06 06:55:50 2023 | Notice (6) | T4 No Station Maint Timeout - Reinitialize MAC... |
| Thu Jul 06 06:56:04 2023 | Notice (6) | Honoring MDD; IP provisioning mode = IPv6 |
| Thu Jul 06 06:56:13 2023 | Warning (5) | ToD request sent - No Response received;CM-MAC=[xxxx];CMTS-MAC=[xxxx];CM-QOS=1.0;CM-VER=3.0; |
| Thu Jul 06 06:56:44 2023 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[xxxx];CMTS-MAC=[xxxx];CM-QOS=1.1;CM-VER=3.0; |
EG
Expert
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110K Messages
2 years ago
Please also post the modem's signal stat values.
Please copy all of the text in its entirety of the *Downstream Power Levels*, the *SNR's* (Signal to Noise Ratios), and the *Upstream Power Level* numbers and paste them into your next post.
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dmu1
Visitor
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11 Messages
2 years ago
Here they are:
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EG
Expert
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110K Messages
2 years ago
Some of the SNR's are on the low side and the upstream power is a bit on the high side, and they may be intermittently fluctuating even farther to out-of-spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.
In an effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1000 MHz, bi-directional, and no gold colored garbage from Home Depot, Target, Wal-Mart, etc. Splitters should be swapped with known to be good / new ones to test.
Also check the coax cable for any damage such as cuts, nicks, abrasions, kinks, sharp bends, etc.
If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two-way splitter connected directly off of the drop from the street / pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.
Good luck with it !
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dmu1
Visitor
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11 Messages
2 years ago
Things are getting worse. The modem disconnects/reboots probably around twice a day. Compared to the last post, the number of uncorrectables has increased significantly (data for today only).
There's no splitter along the line. I have chatted with Xfinity support, and they suggested me to rent their modem. Is it the problem with the cable connection or the modem itself?
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dmu1
Visitor
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11 Messages
2 years ago
The downstream power has more than doubled compared to two months ago. Upstream power sometimes is above 50 dBmV. Don't know if it's related to more instability.
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EG
Expert
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110K Messages
2 years ago
You going to have to keep leaning on them until things get fixed properly ! As stated in my last post, the premises techs are supposed to be escalating this matter to the line maintenance dept. Ask them to open up a ticket.
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