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!

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Responses

dazinger

Contributor

•

17 Messages

5 years 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.

0

dazinger

Contributor

•

17 Messages

5 years 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

0

dazinger

Contributor

•

17 Messages

5 years 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?

0

BruceW

Gold Problem Solver

•

26.5K Messages

5 years 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.

0

dazinger

Contributor

•

17 Messages

5 years 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?

0

dazinger

Contributor

•

17 Messages

5 years 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

0

BruceW

Gold Problem Solver

•

26.5K Messages

5 years 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.

0

dazinger

Contributor

•

17 Messages

5 years ago

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

0

Your Home Network

dazinger

Re: Unstable Internet

dazinger

dazinger

dazinger

BruceW

dazinger

dazinger

BruceW

dazinger

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