Visitor
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6 Messages
Unicast maintenance ranging no response t3 timeout
For over a year now and over 3 different modems I keep getting these errors popping up. It starts unicast maintenance ranging, gets no response, the says commanded power in excess of 6db below the value… I’ve seen the error on the forums before and kept hoping I could fix it but I’m down to having no splitters just plugged into where the line comes in the wall. I have new connectors, and 5 years ago when we moved in a new line was buried for our house. How can I fix this issue?
EG
Expert
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110K Messages
2 years ago
First. Are you actually experiencing any connectivity problems ?
What do the modem's signal stats look like ? Try getting them here; http://192.168.100.1 or here http://10.0.0.1
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.
What is the exact make and model number of the modem / gateway device ?
Please also post those error log entries in their entirety (copy and paste them, don't post a screenshot) but redact the CM MAC and the CMTS MAC addresses for your privacy. They are considered to be personal information. The posting of personally identifying information is a violation of their forum guidelines. The forum bot will not allow your post to be seen publically.
(edited)
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Donkay2232
Visitor
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6 Messages
2 years ago
I’ll grab the levels now but I have had constant issues for years. I work in tech even worked on installing for Xfinity on the business side but it’s beyond me the problems I’m running into. The power levels for my download are great but the uploads fluctuate so much I think it’s a cable outside my property.
I’ve had the problem on my Xfinity Xfi white modem they sent, my personal sb8300, my newer s33, and thinking arris was the problem I just bought a netgear cm2000 and the same errors keep creeping up. I used to have a mechanical timer that shut my network down for 30 minutes every night and that kept everything working well but with the way my city is going I can’t have my cameras taking that much downtime. Let me grab what the levels are now
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Donkay2232
Visitor
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6 Messages
2 years ago
Downstream Bonded Channels
Upstream Bonded Channels
Downstream OFDM Channels
Number Range
Codewords
Codewords
Codewords
Upstream OFDMA Channels
Extended Upstream Transmit Power
Current System Time:Fri Nov 11 17:25:38 2022System Up Time:1 day 02:55:06
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EG
Expert
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110K Messages
2 years ago
@Donkay2232
You didn't redact all of the MAC addresses as you were asked to so your post above with the error log entries was marked private...
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Donkay2232
Visitor
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6 Messages
2 years ago
Sorry about that. Let see if this works now
Time
Priority
Description
Fri Nov 11 17:20:19 2022
(Warning (5))
RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 11 17:18:26 2022
(Critical (3))
Started Unicast Maintenance Ranging - No Response received - T3 time-out; CM-QOS=1.1;CM-VER=3.1;
Fri Nov 11 17:18:24 2022
(Warning (5))
RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 11 17:17:56 2022
(Critical (3))
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 11 17:17:52 2022
(Warning (5))
RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 11 16:48:42 2022
(Critical (3))
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 11 16:48:40 2022
(Warning (5))
RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 11 16:09:26 2022
(Critical (3))
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 11 16:09:24 2022
(Warning (5))
RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 11 16:05:41 2022
(Critical (3))
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-QOS=1.1;CM-VER=3.1
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EG
Expert
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110K Messages
2 years ago
The error log entries indicate that something is going on. Perhaps there is noise ingress into the line(s) / an upstream channel / return path impairment somewhere.
There are other signal stat values that can't be read by the modem. They are the "Upstream Rx Power" (Upstream Receive Power Level), the "Upstream SNR Ch." (Upstream Signal To Noise Ratio), and the "Upstream ICFR" (In Channel Frequency Response). These are as equally important in diagnosing connectivity issues as are the modem's stats.
I'm going to escalate your issue to the Comcast corporate employees that are available to these boards. They will be able to poll the CMTS (Cable Modem Termination System) to check for any real-time degradation and / or error reports, see your node / cable plant, and modem health, and see whether or not everything is in the green zone. They can also see a history plot for the modem and poll for those upstream receive signal stats.
You should get a reply here in your topic. Good luck !
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Donkay2232
Visitor
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6 Messages
2 years ago
Thank you so much! It’s been a long time and I’ve been trying to do it all myself so thank you!
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