Hey Guys,
I just upgraded to xfinitys Gig service last week and my speeds are very inconsistant!
If I run a speed test on xfinity's website I get 500mbps-980mbps, but its very random, and rarely does it hit 900mbps+
When I run tests through another website I dont ever go past 500mbps. (I get they go through other servers and whatnot, but that shouldnt effect my speed by half of what I'm paying for!)
I'm currently using a CM1000v2 Netgear Modem (Docsis 3.1) connected to my Netgear Nighthawk R8000P with Cat7 network cables.
Below are my cable modem signal strengths (i've called xfinity twice now and nothing has changed)
Is there anything wrong with these numbers?
|
|
|
| Startup Procedure |
| Procedure |
Status |
Comment |
| Acquire Downstream Channel |
507000000 Hz |
Locked |
| Connectivity State |
OK |
Operational |
| Boot State |
OK |
Operational |
| Security |
Enable |
BPI+ |
| IP Provisioning Mode |
Honor MDD |
IPv6 only |
|
|
| Downstream Bonded Channels |
| Channel |
Lock Status |
Modulation |
Channel ID |
Frequency |
Power |
SNR / MER |
Unerrored Codewords |
Correctable Codewords |
Uncorrectable Codewords |
| 1 |
Locked |
QAM256 |
5 |
507000000 Hz |
-0.5 dBmV |
39.5 dB |
105731185 |
0 |
0 |
| 2 |
Locked |
QAM256 |
1 |
477000000 Hz |
-1.4 dBmV |
39.5 dB |
104839181 |
0 |
0 |
| 3 |
Locked |
QAM256 |
2 |
483000000 Hz |
-0.9 dBmV |
39.6 dB |
104843188 |
0 |
0 |
| 4 |
Locked |
QAM256 |
3 |
489000000 Hz |
-0.5 dBmV |
39.8 dB |
104847026 |
0 |
0 |
| 5 |
Locked |
QAM256 |
4 |
495000000 Hz |
-0.5 dBmV |
39.8 dB |
104850423 |
0 |
0 |
| 6 |
Locked |
QAM256 |
6 |
513000000 Hz |
-0.9 dBmV |
39.3 dB |
104853886 |
0 |
0 |
| 7 |
Locked |
QAM256 |
7 |
519000000 Hz |
-0.6 dBmV |
39.6 dB |
104858080 |
0 |
0 |
| 8 |
Locked |
QAM256 |
8 |
525000000 Hz |
-1.0 dBmV |
39.5 dB |
104861932 |
0 |
0 |
| 9 |
Locked |
QAM256 |
9 |
531000000 Hz |
-0.6 dBmV |
39.3 dB |
104865648 |
0 |
0 |
| 10 |
Locked |
QAM256 |
10 |
537000000 Hz |
0.4 dBmV |
39.4 dB |
104869061 |
0 |
0 |
| 11 |
Locked |
QAM256 |
11 |
543000000 Hz |
-0.1 dBmV |
39.5 dB |
104873004 |
0 |
0 |
| 12 |
Locked |
QAM256 |
12 |
549000000 Hz |
0.8 dBmV |
39.2 dB |
104876843 |
0 |
0 |
| 13 |
Locked |
QAM256 |
13 |
555000000 Hz |
0.9 dBmV |
39.5 dB |
104880432 |
0 |
0 |
| 14 |
Locked |
QAM256 |
14 |
561000000 Hz |
-0.4 dBmV |
39.2 dB |
104884002 |
0 |
0 |
| 15 |
Locked |
QAM256 |
15 |
567000000 Hz |
0.6 dBmV |
39.3 dB |
104887895 |
0 |
0 |
| 16 |
Locked |
QAM256 |
16 |
573000000 Hz |
1.1 dBmV |
39.4 dB |
104891638 |
0 |
0 |
| 17 |
Locked |
QAM256 |
17 |
579000000 Hz |
0.3 dBmV |
39.4 dB |
104895148 |
0 |
0 |
| 18 |
Locked |
QAM256 |
18 |
585000000 Hz |
0.0 dBmV |
39.0 dB |
104898806 |
0 |
0 |
| 19 |
Locked |
QAM256 |
19 |
591000000 Hz |
-1.1 dBmV |
38.9 dB |
104902677 |
0 |
0 |
| 20 |
Locked |
QAM256 |
20 |
597000000 Hz |
-0.7 dBmV |
38.9 dB |
104906529 |
0 |
0 |
| 21 |
Locked |
QAM256 |
21 |
603000000 Hz |
0.4 dBmV |
39.2 dB |
104910241 |
0 |
0 |
| 22 |
Locked |
QAM256 |
22 |
609000000 Hz |
-0.7 dBmV |
38.9 dB |
104913727 |
0 |
0 |
| 23 |
Locked |
QAM256 |
23 |
615000000 Hz |
-1.2 dBmV |
38.7 dB |
104917828 |
0 |
0 |
| 24 |
Locked |
QAM256 |
25 |
453000000 Hz |
-2.0 dBmV |
39.4 dB |
104921446 |
0 |
0 |
| 25 |
Locked |
QAM256 |
34 |
459000000 Hz |
-1.3 dBmV |
39.6 dB |
104925109 |
0 |
0 |
| 26 |
Locked |
QAM256 |
35 |
465000000 Hz |
-1.3 dBmV |
39.6 dB |
104921469 |
0 |
0 |
| 27 |
Locked |
QAM256 |
36 |
471000000 Hz |
-1.3 dBmV |
39.7 dB |
104923014 |
0 |
0 |
| 28 |
Locked |
QAM256 |
38 |
429000000 Hz |
-2.1 dBmV |
39.6 dB |
104896777 |
0 |
0 |
| 29 |
Locked |
QAM256 |
39 |
435000000 Hz |
-2.0 dBmV |
39.7 dB |
104900715 |
0 |
0 |
| 30 |
Locked |
QAM256 |
40 |
441000000 Hz |
-1.4 dBmV |
39.9 dB |
104903866 |
0 |
0 |
| 31 |
Locked |
QAM256 |
41 |
447000000 Hz |
-1.8 dBmV |
39.6 dB |
104906081 |
0 |
0 |
| 32 |
Not Locked |
Unknown |
0 |
0 Hz |
0.0 dBmV |
0.0 dB |
0 |
0 |
0 |
|
|
| Upstream Bonded Channels |
| Channel |
Lock Status |
Modulation |
Channel ID |
Frequency |
Power |
| 1 |
Locked |
ATDMA |
1 |
35800000 Hz |
55.3 dBmV |
| 2 |
Locked |
ATDMA |
2 |
29400000 Hz |
55.8 dBmV |
| 3 |
Locked |
ATDMA |
3 |
23000000 Hz |
55.3 dBmV |
| 4 |
Locked |
ATDMA |
4 |
16600000 Hz |
54.8 dBmV |
| 5 |
Not Locked |
Unknown |
0 |
0 Hz |
0.0 dBmV |
| 6 |
Not Locked |
Unknown |
0 |
0 Hz |
0.0 dBmV |
| 7 |
Not Locked |
Unknown |
0 |
0 Hz |
0.0 dBmV |
| 8 |
Not Locked |
Unknown |
0 |
0 Hz |
0.0 dBmV |
|
|
| Downstream OFDM Channels |
| Channel |
Lock Status |
Modulation / Profile ID |
Channel ID |
Frequency |
Power |
SNR / MER |
Active Subcarrier Number Range |
Unerrored Codewords |
Correctable Codewords |
Uncorrectable Codewords |
| 1 |
Locked |
0, 1, 2, 3 |
37 |
690000000 Hz |
-1.9 dBmV |
34.5 dB |
1228 ~ 2867 |
16452336 |
10334703 |
0 |
| 2 |
Not Locked |
0 |
0 |
0 Hz |
-7.4 dBmV |
0.0 dB |
0 ~ 4095 |
0 |
0 |
0 |
|
|
| Upstream OFDMA Channels |
| Channel |
Lock Status |
Modulation / Profile ID |
Channel ID |
Frequency |
Power |
| 1 |
Not Locked |
Unknown |
0 |
0 Hz |
0 dBmV |
| 2 |
Not Locked |
Unknown |
0 |
0 Hz |
0 dBmV |
|
EG
Expert
•
111.6K Messages
5 years ago
The upstream power is too high / out of spec. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.
In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test
If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.
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