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Event Log errors

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Event Log errors

Should I be concerened about these errors or the upstream power levels reported?

 

Modem: Arris SB8200

Internet Plan: 1Gig

 

Information
Standard Specification Compliant DOCSIS 3.1
Hardware Version 4
Software Version D31CM-PEREGRINE-1.0.1.0-GA-04-NOSH

 

 

Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
31 Locked QAM256 669000000 Hz 10.2 dBmV 38.9 dB 5 0
1 Locked QAM256 483000000 Hz 8.5 dBmV 39.0 dB 0 0
2 Locked QAM256 489000000 Hz 8.4 dBmV 38.8 dB 0 0
3 Locked QAM256 495000000 Hz 8.3 dBmV 38.8 dB 0 0
4 Locked QAM256 507000000 Hz 8.5 dBmV 38.9 dB 0 0
5 Locked QAM256 513000000 Hz 8.9 dBmV 38.9 dB 0 0
6 Locked QAM256 519000000 Hz 9.2 dBmV 39.0 dB 2 0
7 Locked QAM256 525000000 Hz 9.0 dBmV 39.0 dB 0 0
8 Locked QAM256 531000000 Hz 9.3 dBmV 39.0 dB 1 0
9 Locked QAM256 537000000 Hz 9.2 dBmV 38.9 dB 2 0
10 Locked QAM256 543000000 Hz 9.4 dBmV 38.9 dB 1 0
11 Locked QAM256 549000000 Hz 9.5 dBmV 38.9 dB 1 0
12 Locked QAM256 555000000 Hz 9.6 dBmV 39.0 dB 0 0
13 Locked QAM256 561000000 Hz 9.9 dBmV 39.0 dB 3 0
14 Locked QAM256 567000000 Hz 9.9 dBmV 38.9 dB 2 0
15 Locked QAM256 573000000 Hz 10.1 dBmV 39.0 dB 5 0
16 Locked QAM256 579000000 Hz 10.2 dBmV 39.0 dB 2 0
17 Locked QAM256 585000000 Hz 10.2 dBmV 38.9 dB 5 0
18 Locked QAM256 591000000 Hz 10.0 dBmV 38.8 dB 3 0
19 Locked QAM256 597000000 Hz 10.1 dBmV 38.8 dB 10 0
20 Locked QAM256 603000000 Hz 9.9 dBmV 38.8 dB 14 0
21 Locked QAM256 609000000 Hz 9.9 dBmV 38.5 dB 19 0
22 Locked QAM256 615000000 Hz 9.9 dBmV 38.8 dB 9 0
23 Locked QAM256 621000000 Hz 9.9 dBmV 38.6 dB 18 0
24 Locked QAM256 627000000 Hz 9.7 dBmV 38.6 dB 22 0
25 Locked QAM256 657000000 Hz 10.3 dBmV 39.1 dB 5 0
26 Locked QAM256 633000000 Hz 9.6 dBmV 38.6 dB 19 0
27 Locked QAM256 639000000 Hz 9.8 dBmV 38.8 dB 12 0
28 Locked QAM256 645000000 Hz 9.9 dBmV 38.7 dB 11 0
29 Locked QAM256 651000000 Hz 9.8 dBmV 38.6 dB 21 0
30 Locked QAM256 663000000 Hz 10.3 dBmV 39.0 dB 6 0
32 Locked Other 717000000 Hz 12.8 dBmV 37.5 dB 44986894 0

 

 
Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 7 Locked SC-QAM 23700000 Hz 6400000 Hz 29.3 dBmV
2 5 Locked SC-QAM 36500000 Hz 6400000 Hz 28.8 dBmV
3 6 Locked SC-QAM 30100000 Hz 6400000 Hz 29.3 dBmV
4 8 Locked SC-QAM 17300000 Hz 6400000 Hz 29.3 dBmV

 

 

 

 

 

 

 Time

Priority Description
1-2-2018, 12:25:0 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:1f:a5;CMTS-MAC=00:01:5c:62:a2:5f;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:44 Notice(6) "Honoring MDD; IP provisioning mode = IPv6"
1-1-1970, 0:0:38 Critical(3) "No Ranging Response received - T3 time-out;CM-MAC=90:9d:7d:2e:1f:a5;CMTS-MAC=00:01:5c:62:a2:5f;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:33 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=90:9d:7d:2e:1f:a5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:36 Critical(3) "No Ranging Response received - T3 time-out;CM-MAC=90:9d:7d:2e:1f:a5;CMTS-MAC=00:01:5c:62:a2:5f;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:33 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=90:9d:7d:2e:1f:a5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:37 Critical(3) "No Ranging Response received - T3 time-out;CM-MAC=90:9d:7d:2e:1f:a5;CMTS-MAC=00:01:5c:62:a2:5f;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:33 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=90:9d:7d:2e:1f:a5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:36 Critical(3) "No Ranging Response received - T3 time-out;CM-MAC=90:9d:7d:2e:1f:a5;CMTS-MAC=00:01:5c:62:a2:5f;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:0:33 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=90:9d:7d:2e:1f:a5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
12-28-2017, 2:45:47 Critical(3) "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=90:9d:7d:2e:1f:a5;CMTS-MAC=00:01:5c:62:a2:5f;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:31:8 Critical(3) "No Ranging Response received - T3 time-out;CM-MAC=90:9d:7d:2e:1f:a5;CMTS-MAC=00:01:5c:62:a2:5f;CM-QOS=1.1;CM-VER=3.1;"
1-1-1970, 0:26:32 Critical(3) "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=90:9d:7d:2e:1f:a5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
Expert

Re: Event Log errors

The downstream power is on the high and the upstream power is on the low side. Are you actually experiencing any connectivity problems ?



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Regular Visitor

Re: Event Log errors

I am not noticing any noticible connection issues other than occassionaly my VOIP (not comcast) phone disconnects from the network and then reconnects. I am not sure if that is related. I would need setup some logging on the network see of there are drops that I just may not be noticing. 

 

I do notice that when streaming video to TV the quality does degrade temporarily, but hard to say if that is my connection of the content provider.

 

Aaron

Expert

Re: Event Log errors

Not certain that this will help but for giggles you could try adding a 6 dB or a 10 dB attenuator pad to the line going to the modem and see if it helps. YMMV. 

 

https://www.amazon.com/6db-Attenuator-Pad-1-each/dp/B0013L48XA



I am not a Comcast Employee.
I am a fellow customer, volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.

Was your question answered? Mark the post as best answer!