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Intermittent "No Ranging Response received - T3 time-out"

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Intermittent "No Ranging Response received - T3 time-out"

Hi. I've been experiencing intermittent internet disconnection issues over the last few weeks (about as long as I've had Comcast at this address :/). Basically, whether its a wired connection or a WiFi connection, it seems as if our modem just stops talking to the internet. Sometimes for less than a minute, sometimes for 10 minutes at a time. It is massively impeding us from working at home, like many others are, due to the pandemic. Additionally, there is an issue with our Flex streaming device. Everytime it restarts, it just hangs at the "Welcome" screen, and eventually recommeneds retarting to resolve the issue.

 

There is a tech scheduled to come out tomorrow, but I was wondering if there was anything I should specifically ask them to check, or if there was anything else that has to be done/can be done remotely to mitigate this.

 

Hardware: ARRIS Surfboard (SBG10)


Date Time Event ID Event Level Description
3/20/2020 15:00 82000200 3 No Ranging Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 15:00 84000700 5 RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 15:01 84000500 3 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 15:01 84000700 5 RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 15:13 84000500 3 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 15:13 84000700 5 RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 15:14 84000500 3 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 15:14 84000700 5 RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 15:18 82000200 3 No Ranging Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 15:19 84000700 5 RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 15:24 84000500 3 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 15:24 84000700 5 RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 16:10 84000500 3 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 16:10 84000700 5 RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 16:11 84000500 3 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 16:11 84000700 5 RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 17:11 82000200 3 No Ranging Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 17:11 84000700 5 RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 17:13 84000500 3 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
3/20/2020 17:13 84000700 5 RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;

 

Downstream

  DCID Freq Power SNR Modulation Octets Correcteds Uncorrectables
Downstream 1 25 579.00 MHz 10.00 dBmV 40.37 dB 256QAM 110058417 309957 490879
Downstream 2 26 585.00 MHz 9.80 dBmV 38.98 dB 256QAM 128522444 311625 514700
Downstream 3 27 591.00 MHz 9.30 dBmV 40.95 dB 256QAM 129771053 306999 524986
Downstream 4 28 597.00 MHz 9.10 dBmV 38.98 dB 256QAM 129642909 313486 525373
Downstream 5 29 603.00 MHz 9.00 dBmV 38.98 dB 256QAM 100480692 348379 557071
Downstream 6 30 609.00 MHz 8.70 dBmV 38.61 dB 256QAM 143570093 355195 566398
Downstream 7 31 615.00 MHz 8.30 dBmV 38.98 dB 256QAM 145329893 356554 583687
Downstream 8 32 621.00 MHz 8.40 dBmV 38.61 dB 256QAM 145267301 379489 597772
Downstream 9 33 627.00 MHz 8.00 dBmV 38.61 dB 256QAM 107163533 385765 628830
Downstream 10 34 633.00 MHz 7.50 dBmV 38.98 dB 256QAM 162199636 372930 611275
Downstream 11 35 639.00 MHz 7.40 dBmV 38.61 dB 256QAM 162055835 419745 670925
Downstream 12 36 645.00 MHz 7.60 dBmV 38.61 dB 256QAM 162512395 392602 638849
Downstream 13 37 651.00 MHz 8.00 dBmV 38.61 dB 256QAM 113051899 409337 655299
Downstream 14 38 657.00 MHz 7.40 dBmV 38.61 dB 256QAM 175362631 416894 689419
Downstream 15 39 663.00 MHz 7.40 dBmV 38.98 dB 256QAM 175705226 425779 681635
Downstream 16 40 669.00 MHz 7.30 dBmV 38.61 dB 256QAM 175289710 428102 687337

Upstream

  UCID Freq Power Channel Type Symbol Rate Modulation
Upstream 1 7 23.00 MHz 37.75 dBmV DOCSIS2.0 (ATDMA) 5120 kSym/s 64QAM
Upstream 2 8 16.60 MHz 37.75 dBmV DOCSIS2.0 (ATDMA) 5120 kSym/s 64QAM
Upstream 3 6 29.40 MHz 39.25 dBmV DOCSIS2.0 (ATDMA) 5120 kSym/s 64QAM
Upstream 4 5 35.80 MHz 39.25 dBmV DOCSIS2.0 (ATDMA) 5120 kSym/s 64QAM

 

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Regular Visitor

Re: Intermittent "No Ranging Response received - T3 time-out"

So the tech came out on Saturday, and replaced the coax between our node and our house. I think this helped mitigate the issue a bit, and the SNR is definitely better. But, it seems like there is still a lot of noise in the signal, because the intermittent drops are still happening due to loss of sync. The T3 time-outs are less frequent, but it seems like the losses of sync are not.