Recently I've noticed that my internet speeds will frequently drop to around 30mbps. A reboot of the modem brings the speeds back up (to only 160mbps even though I have the 800mbps plan) for a bit (usually only a few hours).
I had originally thought it was the bottleneck of the modem (I had a Netgear CM500V), so I got the Netgear CM1150V, but the speeds haven't changed (I still only get 160mbps even after a reboot).
I have been checking the modem levels and everything seems ok, other than a pretty large number of uncorrectables:
| Startup Procedure |
| Procedure |
Status |
Comment |
| Acquire Downstream Channel |
519000000 Hz |
| Connectivity State |
OK |
| Boot State |
OK |
| Security |
Enabled |
| IP Provisioning Mode |
Honor MDD |
|
|
|
| Downstream Bonded Channels |
| Channel |
Lock Status |
Modulation |
Channel ID |
Frequency |
Power |
SNR |
Correctables |
Uncorrectables |
| 1 |
Locked |
QAM256 |
13 |
519000000 Hz |
2.4 dBmV |
43.7 dB |
557 |
252 |
| 2 |
Locked |
QAM256 |
1 |
441000000 Hz |
1.5 dBmV |
43.3 dB |
840 |
646 |
| 3 |
Locked |
QAM256 |
2 |
453000000 Hz |
1.6 dBmV |
43.2 dB |
865 |
550 |
| 4 |
Locked |
QAM256 |
3 |
459000000 Hz |
1.4 dBmV |
43.1 dB |
842 |
523 |
| 5 |
Locked |
QAM256 |
4 |
465000000 Hz |
1.7 dBmV |
43.3 dB |
782 |
486 |
| 6 |
Locked |
QAM256 |
5 |
471000000 Hz |
1.9 dBmV |
43.3 dB |
864 |
426 |
| 7 |
Locked |
QAM256 |
6 |
477000000 Hz |
2.4 dBmV |
43.6 dB |
704 |
414 |
| 8 |
Locked |
QAM256 |
7 |
483000000 Hz |
2.3 dBmV |
43.6 dB |
794 |
364 |
| 9 |
Locked |
QAM256 |
8 |
489000000 Hz |
2.3 dBmV |
43.6 dB |
646 |
405 |
| 10 |
Locked |
QAM256 |
9 |
495000000 Hz |
2.2 dBmV |
43.6 dB |
719 |
359 |
| 11 |
Locked |
QAM256 |
10 |
501000000 Hz |
2.8 dBmV |
43.8 dB |
701 |
329 |
| 12 |
Locked |
QAM256 |
11 |
507000000 Hz |
3.1 dBmV |
43.9 dB |
590 |
366 |
| 13 |
Locked |
QAM256 |
12 |
513000000 Hz |
2.7 dBmV |
43.8 dB |
589 |
285 |
| 14 |
Locked |
QAM256 |
14 |
525000000 Hz |
3.1 dBmV |
44 dB |
558 |
280 |
| 15 |
Locked |
QAM256 |
15 |
531000000 Hz |
3.4 dBmV |
44 dB |
627 |
279 |
| 16 |
Locked |
QAM256 |
16 |
537000000 Hz |
3.2 dBmV |
43.9 dB |
546 |
253 |
| 17 |
Locked |
QAM256 |
17 |
543000000 Hz |
2.6 dBmV |
43.8 dB |
448 |
250 |
| 18 |
Locked |
QAM256 |
18 |
555000000 Hz |
4.1 dBmV |
44.3 dB |
478 |
169 |
| 19 |
Locked |
QAM256 |
19 |
561000000 Hz |
3.9 dBmV |
44.2 dB |
434 |
197 |
| 20 |
Locked |
QAM256 |
20 |
567000000 Hz |
3.5 dBmV |
44.1 dB |
402 |
212 |
| 21 |
Locked |
QAM256 |
21 |
573000000 Hz |
3.6 dBmV |
44.1 dB |
407 |
198 |
| 22 |
Locked |
QAM256 |
22 |
579000000 Hz |
4.1 dBmV |
44.3 dB |
415 |
163 |
| 23 |
Locked |
QAM256 |
23 |
585000000 Hz |
3.9 dBmV |
44 dB |
309 |
167 |
| 24 |
Locked |
QAM256 |
24 |
591000000 Hz |
3.6 dBmV |
44.1 dB |
371 |
168 |
| 25 |
Locked |
QAM256 |
26 |
597000000 Hz |
3.5 dBmV |
44.1 dB |
434 |
152 |
| 26 |
Locked |
QAM256 |
27 |
603000000 Hz |
3.9 dBmV |
44.1 dB |
364 |
143 |
| 27 |
Locked |
QAM256 |
28 |
609000000 Hz |
4 dBmV |
44 dB |
329 |
149 |
| 28 |
Locked |
QAM256 |
29 |
615000000 Hz |
4.1 dBmV |
44.1 dB |
302 |
163 |
| 29 |
Locked |
QAM256 |
30 |
621000000 Hz |
4.1 dBmV |
44.1 dB |
350 |
174 |
| 30 |
Locked |
QAM256 |
31 |
627000000 Hz |
4 dBmV |
44 dB |
269 |
134 |
| 31 |
Locked |
QAM256 |
32 |
633000000 Hz |
3.9 dBmV |
43.9 dB |
353 |
119 |
| 32 |
Not Locked |
Unknown |
0 |
0 Hz |
0.0 dBmV |
0.0 dB |
0 |
0 |
|
|
|
| Upstream Bonded Channels |
| Channel |
Lock Status |
US Channel Type |
Channel ID |
Symbol Rate |
Frequency |
Power |
| 1 |
Locked |
ATDMA |
89 |
5120 Ksym/sec |
36500000 Hz |
46.3 dBmV |
| 2 |
Locked |
ATDMA |
90 |
5120 Ksym/sec |
30100000 Hz |
47 dBmV |
| 3 |
Locked |
ATDMA |
91 |
5120 Ksym/sec |
23700000 Hz |
46.5 dBmV |
| 4 |
Locked |
ATDMA |
92 |
5120 Ksym/sec |
17300000 Hz |
46 dBmV |
| 5 |
Not Locked |
Unknown |
0 |
0 Ksym/sec |
0 Hz |
0.0 dBmV |
| 6 |
Not Locked |
Unknown |
0 |
0 Ksym/sec |
0 Hz |
0.0 dBmV |
| 7 |
Not Locked |
Unknown |
0 |
0 Ksym/sec |
0 Hz |
0.0 dBmV |
| 8 |
Not Locked |
Unknown |
0 |
0 Ksym/sec |
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 |
25 |
693000000 Hz |
4.6 dBmV |
42.9 dB |
1108 ~ 2987 |
445879978 |
229301528 |
110 |
| 2 |
Not Locked |
0 |
0 |
0 Hz |
0 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 |
0 |
0 |
0 Hz |
0 dBmV |
| 2 |
Not Locked |
0 |
0 |
0 Hz |
0 dBmV |
|
|
|
| Current System Time:Wed Apr 21 15:42:56 2021 |
| System Up Time:08:14:32 |
user_PeterC
Contributor
•
150 Messages
5 years ago
Hello @cswieson, I hate to see that your internet connection has been dropping. I work from home and take classes online, so I know how critical maintaining a consistent and reliable connection is, but I'd be happy to run through some troubleshooting and get to the bottom of this for you! Please send us a Live Chat with your first and last name as well as your service address so we can assist.
To send a Live Chat, click the Peer to Peer chat icon at the top right of the page and enter Xfinity Support in the "To" section of the chat.
0
0
ksatterwhite
Visitor
•
4 Messages
5 years ago
Did you get a resolution to this? I’ve read about this same issue numerous times. I have the same issue.
1
0