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5 Messages
SB8200 - High number of Uncorrectables / No internet
Ever since around 9PM yesterday, my Arris SB8200 has been acting strange. My Deco system will no longer pull an IP from the ISP or connect to the internet. I have been able to connect 2 out of 4 Windows machines to the internet OK via the Arrius ethernet port / ISP DHCP. I called Comcast support and they pretty much told me I'm on my own since at least one of my devices seems to be able to get internet and my modem seems connected to Comcast OK. I work in IT and do a fair amount of IP troubleshooting, so I feel flummoxed I cannot figure this out. I used the same IP info from a known working device on the Deco system and the non-working Windows machines it still will not connect to the internet. I logged into the cable modem, and it has been throwing errors and shows a high amount of Uncorrectables. No changes on end prompted any of this, it just stopped working yesterday around 9pm.
| Channel ID | Lock Status | Modulation | Frequency | Power | SNR/MER | Corrected | Uncorrectables |
| 5 | Locked | QAM256 | 507000000 Hz | -12.7 dBmV | 37.5 dB | 0 | 0 |
| 2 | Locked | QAM256 | 489000000 Hz | -13.0 dBmV | 37.2 dB | 0 | 0 |
| 3 | Locked | QAM256 | 495000000 Hz | -19.4 dBmV | 31.4 dB | 0 | 0 |
| 4 | Locked | QAM256 | 501000000 Hz | -15.6 dBmV | 35.3 dB | 0 | 0 |
| 6 | Locked | QAM256 | 513000000 Hz | -11.9 dBmV | 38.2 dB | 0 | 0 |
| 7 | Locked | QAM256 | 519000000 Hz | -13.6 dBmV | 36.8 dB | 0 | 0 |
| 8 | Locked | QAM256 | 525000000 Hz | -15.4 dBmV | 35.5 dB | 0 | 0 |
| 9 | Locked | QAM256 | 531000000 Hz | -15.2 dBmV | 35.7 dB | 0 | 0 |
| 10 | Locked | QAM256 | 537000000 Hz | -16.7 dBmV | 33.9 dB | 0 | 0 |
| 11 | Locked | QAM256 | 543000000 Hz | -18.4 dBmV | 32.2 dB | 0 | 0 |
| 12 | Locked | QAM256 | 549000000 Hz | -15.0 dBmV | 35.8 dB | 0 | 0 |
| 13 | Locked | QAM256 | 555000000 Hz | -17.8 dBmV | 32.8 dB | 0 | 0 |
| 14 | Locked | QAM256 | 561000000 Hz | -17.3 dBmV | 32.2 dB | 0 | 0 |
| 15 | Locked | QAM256 | 567000000 Hz | -16.4 dBmV | 34.0 dB | 0 | 0 |
| 16 | Locked | QAM256 | 573000000 Hz | -15.6 dBmV | 35.1 dB | 0 | 0 |
| 17 | Locked | QAM256 | 579000000 Hz | -14.5 dBmV | 36.0 dB | 0 | 0 |
| 18 | Locked | QAM256 | 585000000 Hz | -14.6 dBmV | 34.5 dB | 0 | 0 |
| 19 | Locked | QAM256 | 591000000 Hz | -19.0 dBmV | 30.8 dB | 5 | 0 |
| 20 | Locked | QAM256 | 597000000 Hz | -21.8 dBmV | 29.5 dB | 1270 | 0 |
| 21 | Locked | QAM256 | 603000000 Hz | -19.2 dBmV | 31.8 dB | 1 | 0 |
| 22 | Locked | QAM256 | 609000000 Hz | -19.9 dBmV | 31.1 dB | 6 | 0 |
| 23 | Locked | QAM256 | 615000000 Hz | -27.0 dBmV | 0.0 dB | 4034 | 0 |
| 24 | Not Locked | Unknown | 621000000 Hz | -30.3 dBmV | 0.0 dB | 0 | 0 |
| 25 | Not Locked | Unknown | 627000000 Hz | -29.8 dBmV | 0.0 dB | 0 | 0 |
| 26 | Locked | QAM256 | 633000000 Hz | -23.0 dBmV | 27.8 dB | 487783 | 4 |
| 27 | Locked | QAM256 | 639000000 Hz | -18.8 dBmV | 32.3 dB | 0 | 0 |
| 28 | Locked | QAM256 | 645000000 Hz | -17.1 dBmV | 33.9 dB | 0 | 0 |
| 29 | Locked | QAM256 | 651000000 Hz | -18.1 dBmV | 32.5 dB | 1 | 0 |
| 30 | Locked | QAM256 | 657000000 Hz | -22.4 dBmV | 29.1 dB | 7524 | 0 |
| 31 | Locked | QAM256 | 663000000 Hz | -21.5 dBmV | 29.8 dB | 387 | 0 |
| 32 | Locked | QAM256 | 669000000 Hz | -22.0 dBmV | 29.3 dB | 2210 | 0 |
| 37 | Locked | Other | 690000000 Hz | -28.2 dBmV | 21.0 dB | 48450481 | 6692053 |
| Date Time | Event ID | Event Level | Description |
|---|---|---|---|
| 09/15/2022 11:10 | 74010100 | 6 | "CM-STATUS message sent. Event Type Code: 16; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 09/15/2022 11:10 | 67061600 | 6 | "DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=XXXX:bb;CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 2436694066 | 6 | "Honoring MDD; IP provisioning mode = IPv6" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 09/15/2022 09:52 | 2436694044 | 3 | "Resetting the cable modem due to docsDevResetNow" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 08/19/2022 03:19 | 82000500 | 3 | "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=xxxx CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=xxxx;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 82000200 | 3 | "No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=0XXXX:69;CM-QOS=1.1;CM-VER=3.1;" |
| 01/01/1970 00:00 | 84000100 | 3 | "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=XXXXXX:bb;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" |
| 07/26/2022 03:04 | 82000500 | 3 | "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;" |
flatlander3
Problem Solver
•
547 Messages
3 months ago
If you look outside, did someone run over the communication pedestal with a truck, or is it under water? Someone take out a power pole? Rats chewing on cable? You got no downstream power. That's a mess.
Try to trace it through your house from where you screw into the wall, to where the cable comes in from the street. Splitters won't help. If it's a clean run, then you really do need an Xfinity tech to come out and check out the signal on THEIR side from where it enters the house.
*Another thought. If it's apartment life, perhaps someone is trying some old school cable do-it-yourself cable theft. I'd be surprised if an Xfinity tech is working at 9pm messing with it. Someone else may be. Could explain a sudden problem.
(edited)
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zip21222
Contributor
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134 Messages
3 months ago
"I called Comcast support and they pretty much told me I'm on my own since at least one of my devices seems to be able to get internet and my modem seems connected to Comcast OK."
You're getting -30.3 dBmV downstream power, and Comcast says you're 'connected OK'?
I've been watching these boards for a couple years now, and that's a new low, even for a company [Edited: "Inflammatory"]....
(edited)
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user_jol15
Visitor
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5 Messages
3 months ago
Oddly enough, now the Deco will pull an IP and has internet connectivity. This is what the channels look like now, in case anyone is curious. Looks like downstream power is still out of spec. You folks have been so helpful. Thanks again.
(edited)
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EG
Expert
•
96.8K Messages
3 months ago
I'll add some possible stuff to check for. YMMV;
In an effort to try to obtain better connectivity, 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 Radio Shack, Home Depot, Target, 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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