dazinger's profile

New Poster

 • 

16 Messages

Wed, Jan 29, 2020 11:00 AM

Re: Unstable Internet

sounds almost exactly like my issue, but I have a XB6-T Technicolor modem and no router.

 

Asus Maximus VI Hero

Intel i7 4790k

Nvidia GTX 980

Gskill 1600 Mhz 4x4Gb

wired internet

cat6 cable

techs replaced my line with full fiber

all the coaxial copper in the apartment tests full speed, I have my own doodad that measures this and the technicians confirmed this too

1Gbps plan

 

performed exactly all of the OP troubleshooting steps, including a full (!) computer wipe (!) OS reset and still the same issue with the same symptoms!

Responses

dazinger

New Poster

 • 

16 Messages

1 y ago

I appreciate the redirect to my post.  This information is fully accurate and I am glad that it actually was saved!

 

Just a note, the thread that this is related to is this:

 

https://forums.xfinity.com/t5/Your-Home-Network/Unstable-internet/td-p/3289855

 

This issue happens during "peak hours" -- during 7/8 AM weekdays to ~7/8 PM or later.  If it happens on weekends, it's random mostly.  It feels like a broadband issue almost, except my line is fiber outside my apartment room.

dazinger

New Poster

 • 

16 Messages

1 y ago

Here is the information you need from my modem.

 

Downstream
	Channel Bonding Value
Index 	
37
	
9
	
10
	
11
	
12
	
13
	
14
	
15
	
16
	
17
	
18
	
19
	
20
	
21
	
22
	
23
	
24
	
25
	
26
	
27
	
28
	
29
	
30
	
31
	
32
	
33
	
34
	
35
	
36
	
38
	
39
	
40
	
159
	
Lock Status 	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
	
Locked
Frequency 	
675 MHz
	
507 MHz
	
513 MHz
	
519 MHz
	
525 MHz
	
531 MHz
	
537 MHz
	
543 MHz
	
549 MHz
	
555 MHz
	
561 MHz
	
567 MHz
	
573 MHz
	
579 MHz
	
585 MHz
	
591 MHz
	
597 MHz
	
603 MHz
	
609 MHz
	
615 MHz
	
621 MHz
	
627 MHz
	
633 MHz
	
639 MHz
	
645 MHz
	
651 MHz
	
657 MHz
	
663 MHz
	
669 MHz
	
681 MHz
	
687 MHz
	
693 MHz
	
702 MHz
	
641600000
SNR 	
38.4 dB
	
37.0 dB
	
39.3 dB
	
39.3 dB
	
39.8 dB
	
39.8 dB
	
40.1 dB
	
39.8 dB
	
39.5 dB
	
40.1 dB
	
39.9 dB
	
39.6 dB
	
40.5 dB
	
39.1 dB
	
39.8 dB
	
38.9 dB
	
39.5 dB
	
39.7 dB
	
40.2 dB
	
39.6 dB
	
40.1 dB
	
39.6 dB
	
39.7 dB
	
39.3 dB
	
39.9 dB
	
39.5 dB
	
39.7 dB
	
39.3 dB
	
39.2 dB
	
39.3 dB
	
38.9 dB
	
39.2 dB
	
38.2 dB
	
NA
Power Level 	
-2.6 dBmV
	
-5.1 dBmV
	
-4.3 dBmV
	
-4.7 dBmV
	
-4.4 dBmV
	
-4.4 dBmV
	
-3.5 dBmV
	
-4.3 dBmV
	
-3.5 dBmV
	
-2.8 dBmV
	
-2.4 dBmV
	
-3.5 dBmV
	
-2.1 dBmV
	
-1.8 dBmV
	
-1.1 dBmV
	
-2.5 dBmV
	
0.9 dBmV
	
-1.1 dBmV
	
-1.0 dBmV
	
-2.0 dBmV
	
0.7 dBmV
	
-2.2 dBmV
	
-1.9 dBmV
	
-2.9 dBmV
	
-1.0 dBmV
	
-1.9 dBmV
	
-1.0 dBmV
	
-1.4 dBmV
	
-1.5 dBmV
	
0.4 dBmV
	
0.8 dBmV
	
0.6 dBmV
	
1.8 dBmV
	
NA
Modulation 	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
256 QAM
	
OFDM
	
OFDM
Upstream
	Channel Bonding Value
Index 	
1
	
2
	
3
	
4
Lock Status 	
Locked
	
Locked
	
Locked
	
Locked
Frequency 	
36 MHz
	
30 MHz
	
23 MHz
	
17 MHz
Symbol Rate 	
5120
	
5120
	
5120
	
5120
Power Level 	
46.0 dBmV
	
45.0 dBmV
	
45.5 dBmV
	
46.0 dBmV
Modulation 	
QAM
	
QAM
	
QAM
	
QAM
Channel Type 	
ATDMA
	
ATDMA
	
ATDMA
	
ATDMA
CM Error Codewords
Index 	
1
	
2
	
3
	
4
	
5
	
6
	
7
	
8
	
9
	
10
	
11
	
12
	
13
	
14
	
15
	
16
	
17
	
18
	
19
	
20
	
21
	
22
	
23
	
24
	
25
	
26
	
27
	
28
	
29
	
30
	
31
	
32
	
33
Unerrored Codewords 	
2229816304
	
2971219895
	
2971225487
	
2971234496
	
2971240861
	
2971245631
	
2971250602
	
2971255353
	
2971262348
	
2971270254
	
2971275742
	
2971283804
	
2971288786
	
2971286484
	
2971291375
	
2971295639
	
2971321455
	
2971326324
	
2971338466
	
2971343148
	
2971347165
	
2971351719
	
2971356788
	
2971361733
	
2971366454
	
2971371557
	
2971376117
	
2971380762
	
2971386963
	
2971391223
	
2971393486
	
2971393193
	
2229816304
Correctable Codewords 	
1419591991
	
939
	
587
	
1315
	
699
	
506
	
577
	
609
	
1125
	
767
	
1505
	
585
	
473
	
697
	
478
	
236
	
573
	
718
	
651
	
493
	
978
	
744
	
590
	
503
	
443
	
399
	
456
	
419
	
505
	
508
	
525
	
534
	
1419591991
Uncorrectable Codewords 	
1334
	
2520
	
1268
	
885
	
599
	
583
	
492
	
334
	
3197
	
3165
	
1791
	
253
	
193
	
2949
	
2164
	
1141
	
2514
	
2869
	
86
	
388
	
805
	
639
	
442
	
484
	
495
	
507
	
447
	
452
	
354
	
363
	
307
	
310
	
1334
dazinger

New Poster

 • 

16 Messages

1 y ago

is anyone going to reply???  does anyone know what's going on?

 

I have a feeling/theory that the node has so much traffic that there is a very large speed differential.  The speed differential could be anything, but basically what ends up happening is that my wired PC does not have the ability to pick up the slack between "low points" and "high points".

 

I suspect a router usually handles this.  I have no router, though.  So what settings on my PC (Windows 10 x64) can I set to make it work better without a router?

BruceW

Gold Problem Solver

 • 

22.4K Messages

1 y ago


@dazinger wrote: And there are no errors in the logbook, only notices.

Time to turn this over to a Comcast premise tech. Call them at the phone number on your bill or 1-800-Comcast, or use one of the options on https://www.xfinity.com/support/contact-us/. If they can't fix the problem remotely (unlikely), insist they send a tech out to identify the cause and correct it.

If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit unless you have their Service Protection Plan (https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast rental device, or anything outside your home, you shouldn't be charged.

dazinger

New Poster

 • 

16 Messages

1 y ago

Splitters are just a few bucks to purchase.  Same with coax, so couldn't I just replace those on my own?

 

How about motherboard electrical interference?  How can I test for those?

dazinger

New Poster

 • 

16 Messages

1 y ago

@BruceW Upstream power levels are on that same post.  No matter, though.  Here it is showing today:

 

Downstream
Channel Bonding Value
Index
37
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
38
39
40
159
 
Lock Status
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Frequency
675 MHz
507 MHz
513 MHz
519 MHz
525 MHz
531 MHz
537 MHz
543 MHz
549 MHz
555 MHz
561 MHz
567 MHz
573 MHz
579 MHz
585 MHz
591 MHz
597 MHz
603 MHz
609 MHz
615 MHz
621 MHz
627 MHz
633 MHz
639 MHz
645 MHz
651 MHz
657 MHz
663 MHz
669 MHz
681 MHz
687 MHz
693 MHz
702 MHz
641600000
SNR
39.3 dB
37.8 dB
39.3 dB
39.4 dB
39.9 dB
40.1 dB
40.2 dB
40.0 dB
39.9 dB
40.6 dB
40.1 dB
40.2 dB
40.8 dB
38.7 dB
40.1 dB
39.1 dB
40.0 dB
40.5 dB
40.8 dB
40.4 dB
40.7 dB
40.2 dB
40.4 dB
39.9 dB
40.5 dB
40.0 dB
40.1 dB
40.0 dB
39.9 dB
40.2 dB
40.0 dB
40.1 dB
36.1 dB
NA
Power Level
-2.9 dBmV
-5.7 dBmV
-4.9 dBmV
-5.4 dBmV
-5.2 dBmV
-5.2 dBmV
-4.3 dBmV
-5.3 dBmV
-4.4 dBmV
-3.6 dBmV
-3.2 dBmV
-4.3 dBmV
-2.9 dBmV
-2.4 dBmV
-1.7 dBmV
-3.1 dBmV
-1.5 dBmV
-1.7 dBmV
-1.5 dBmV
-2.5 dBmV
-1.2 dBmV
-2.6 dBmV
-2.3 dBmV
-3.3 dBmV
-1.4 dBmV
-2.4 dBmV
-1.5 dBmV
-1.9 dBmV
-1.9 dBmV
0.7 dBmV
-1.0 dBmV
0.3 dBmV
1.4 dBmV
NA
Modulation
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
OFDM
OFDM
Upstream
Channel Bonding Value
Index
1
2
3
4
Lock Status
Locked
Locked
Locked
Locked
Frequency
36 MHz
30 MHz
23 MHz
17 MHz
Symbol Rate
5120
5120
5120
5120
Power Level
46.5 dBmV
45.5 dBmV
46.0 dBmV
46.5 dBmV
Modulation
QAM
QAM
QAM
QAM
Channel Type
ATDMA
ATDMA
ATDMA
ATDMA
CM Error Codewords
Index
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Unerrored Codewords
2371307000
2909882262
2909883314
2909892917
2909896601
2909902273
2909908209
2909912675
2909924880
2909930118
2909934546
2909939786
2909944740
2909948833
2909954211
2909958923
2909978158
2909981486
2909987820
2909992609
2909999089
2910003471
2910008764
2910012512
2910017686
2910022979
2910026910
2910032292
2910051462
2910036793
2910041893
2910042587
2371307000
Correctable Codewords
1677194629
0
2
1
1
1
6
9
2
4
1
1
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
4
1
2
6
1677194629
Uncorrectable Codewords
21
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
21
BruceW

Gold Problem Solver

 • 

22.4K Messages

1 y ago


@dazinger wrote: Here is the information you need from my modem. ...

Please see Connection Troubleshooting Tips. Also please provide the upstream power levels, and the error log. If these could be more readable, that would help. The downstream info is hard to read, but seems OK as far as I can tell.

dazinger

New Poster

 • 

16 Messages

1 y ago

And there are no errors in the logbook, only notices.

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