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SIP DNS Query Failure - Periodic loss of Internet - Manual cycle of the modem required

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SIP DNS Query Failure - Periodic loss of Internet - Manual cycle of the modem required

I am facing an issue similar to the one highlighted at https://forums.xfinity.com/t5/Your-Home-Network/Every-11-days-lost-Internet-connection/td-p/3333854 (that thread is locked).

 

I periodically lose Internet access.  I own a T25.  The log shows:

on July 10th

7/10/2020 2:28 65511 SIP DNS Query Failure
7/10/2020 4:08 65511 SIP DNS Query Failure- Cleared
7/10/2020 4:59 65511 SIP DNS Query Failure
7/10/2020 4:59 65527 SIP Registration Timeout
7/10/2020 4:59 65511 SIP DNS Query Failure- Cleared
7/10/2020 4:59 65527 SIP Registration Timeout- Cleared
7/10/2020 4:59 65511 SIP DNS Query Failure
7/10/2020 5:49 65511 SIP DNS Query Failure- Cleared
7/10/2020 5:49 65511 SIP DNS Query Failure
7/10/2020 6:39 65511 SIP DNS Query Failure- Cleared
7/10/2020 7:05 16 MTA TFTP: Successful
7/10/2020 7:05 4000951500 Provisioning Complete
7/10/2020 7:05 26 MTA PROV: Successful!
     
     

 

Then again today:

7/15/2020 0:44 65511 SIP DNS Query Failure
7/15/2020 0:44 65527 SIP Registration Timeout
7/15/2020 0:45 65511 SIP DNS Query Failure- Cleared
7/15/2020 0:45 65527 SIP Registration Timeout
7/15/2020 0:45 65511 SIP DNS Query Failure
7/15/2020 0:45 65511 SIP DNS Query Failure- Cleared
7/15/2020 0:45 65527 SIP Registration Timeout- Cleared
7/15/2020 0:45 65511 SIP DNS Query Failure
7/15/2020 1:06 65511 SIP DNS Query Failure- Cleared
7/15/2020 2:25 65511 SIP DNS Query Failure
7/15/2020 2:25 65527 SIP Registration Timeout
7/15/2020 2:26 65511 SIP DNS Query Failure- Cleared
7/15/2020 2:26 65527 SIP Registration Timeout
7/15/2020 2:26 65511 SIP DNS Query Failure
7/15/2020 2:26 65527 SIP Registration Timeout- Cleared
7/15/2020 2:26 65511 SIP DNS Query Failure- Cleared
7/15/2020 3:17 65511 SIP DNS Query Failure
7/15/2020 3:17 65511 SIP DNS Query Failure- Cleared
7/15/2020 4:07 65511 SIP DNS Query Failure
7/15/2020 4:49 16 MTA TFTP: Successful
7/15/2020 4:49 4000951500 Provisioning Complete

 

I contacted Comcast twice:

(1) First time was told the issue would be escalated as "frequent outage" and given a CR number.

 

(2) Second time, I contacted Comcast to update the ticket to let them know that Arris tech support had told me the upload power was out of spec.  I was told that the first SR was not valid (old, for another customer, so I think this was to get rid of me).  I was told again my issue would be escalated, and I would hear by e-mail in 2-3 days.  No joy!  

 

I understand COVID prevention should guide Comcast to discourage onsite visit, but I strongly suspect my issue is due to something with Comcast.  The issue started to appear after a series of local outage in my area.

 

My power levels are below:

 

Downstream QAM

  DCID Freq Power SNR Modulation Octets Correcteds Uncorrectables
Downstream 1 36 609.00 MHz 2.30 dBmV 38.61 dB 256QAM 2626672569 0 0
Downstream 2 8 435.00 MHz 2.40 dBmV 40.37 dB 256QAM 1600988494 0 0
Downstream 3 9 441.00 MHz 2.10 dBmV 40.37 dB 256QAM 451871352 0 0
Downstream 4 10 447.00 MHz 2.10 dBmV 40.37 dB 256QAM 451957219 0 0
Downstream 5 11 453.00 MHz 2.30 dBmV 40.37 dB 256QAM 455994598 0 0
Downstream 6 12 459.00 MHz 2.10 dBmV 40.37 dB 256QAM 2871444188 0 0
Downstream 7 13 465.00 MHz 2.30 dBmV 40.37 dB 256QAM 450908114 0 0
Downstream 8 14 471.00 MHz 2.30 dBmV 40.37 dB 256QAM 448727933 0 0
Downstream 9 15 477.00 MHz 2.20 dBmV 40.37 dB 256QAM 446200091 4 0
Downstream 10 16 483.00 MHz 2.40 dBmV 40.95 dB 256QAM 317021181 0 0
Downstream 11 17 489.00 MHz 1.90 dBmV 40.37 dB 256QAM 292268236 0 0
Downstream 12 18 495.00 MHz 2.10 dBmV 40.37 dB 256QAM 293029220 5 0
Downstream 13 19 507.00 MHz 2.00 dBmV 40.37 dB 256QAM 289721140 0 0
Downstream 14 20 513.00 MHz 2.40 dBmV 40.37 dB 256QAM 241603195 0 0
Downstream 15 21 519.00 MHz 2.40 dBmV 38.98 dB 256QAM 304413674 0 0
Downstream 16 22 525.00 MHz 2.30 dBmV 40.37 dB 256QAM 304749841 0 0
Downstream 17 23 531.00 MHz 2.70 dBmV 40.37 dB 256QAM 303913343 0 0
Downstream 18 24 537.00 MHz 2.60 dBmV 40.37 dB 256QAM 232891630 0 0
Downstream 19 25 543.00 MHz 2.70 dBmV 40.95 dB 256QAM 279778711 0 0
Downstream 20 26 549.00 MHz 3.00 dBmV 40.37 dB 256QAM 281548113 0 0
Downstream 21 27 555.00 MHz 3.20 dBmV 40.37 dB 256QAM 280771135 0 0
Downstream 22 28 561.00 MHz 3.20 dBmV 40.37 dB 256QAM 236058949 0 0
Downstream 23 29 567.00 MHz 3.10 dBmV 40.37 dB 256QAM 282848842 0 0
Downstream 24 30 573.00 MHz 3.20 dBmV 40.37 dB 256QAM 280709888 0 0
Downstream 25 31 579.00 MHz 3.00 dBmV 40.95 dB 256QAM 284972080 0 0
Downstream 26 32 585.00 MHz 3.40 dBmV 40.37 dB 256QAM 230622779 0 0
Downstream 27 33 591.00 MHz 2.90 dBmV 40.37 dB 256QAM 278127891 0 0
Downstream 28 34 597.00 MHz 3.00 dBmV 38.98 dB 256QAM 278773893 0 0
Downstream 29 35 603.00 MHz 2.80 dBmV 40.95 dB 256QAM 276091587 0 0
Downstream 30 37 615.00 MHz 2.90 dBmV 40.95 dB 256QAM 296627166 498 3408
Downstream 31 38 621.00 MHz 2.40 dBmV 38.61 dB 256QAM 290957677 83 46
Reset FEC Counters

Downstream OFDM

  FFT Type Channel Width(MHz) # of Active Subcarriers First Active Subcarrier(MHz) Last Active Subcarrier(MHz) Average RxMER(dB)
Pilot PLC Data
Downstream 2 4K 88 1760 679 766 47 41 41
 

Upstream QAM

  UCID Freq Power Channel Type Symbol Rate Modulation
Upstream 1 2 23.70 MHz 35.00 dBmV DOCSIS2.0 (ATDMA) 5120 kSym/s 64QAM
Upstream 2 5 41.20 MHz 45.75 dBmV DOCSIS2.0 (ATDMA) 1280 kSym/s 64QAM
Upstream 3 4 36.50 MHz 34.75 dBmV DOCSIS2.0 (ATDMA) 5120 kSym/s 64QAM
Upstream 4 3 30.10 MHz 35.75 dBmV DOCSIS2.0 (ATDMA) 5120 kSym/s 64QAM
Upstream 5 1 17.30 MHz 34.75 dBmV DOCSIS2.0 (ATDMA) 5120 kSym/s 64QAM

Upstream OFDM

  FFT Type Channel Width(MHz) # of Active Subcarriers First Active Subcarrier(MHz) Last Active Subcarrier(MHz) Tx Power(dBmV)

 

 Status
System Uptime: 0 d: 10 h: 23 m
Computers Detected: staticCPE(1), dynamicCPE(1)
CM Status: Telephony-Reg Complete
Time and Date: Wed 2020-07-15 15:10:56

 

Does anybody know what is going on, and how could this issue be solved?