Visitor
•
5 Messages
Signed up for Ultrafast Internet, but not getting that speed
I signed up for Ultrafast Internet (900 Mbps) toward the end of December, but haven't seen anything above ~160 (about the same as when I had 200 Mbps service). I have a Motorola MB8611 modem and Linksys EA8300 router. The Link Speed under Windows Wi-fi properties varies from 520-650, but speed from the router to WiFi is never more than 160. I have noted some Warnings and Notices in the Event Log of the router, not sure if this is part of the problem. If I can't get Ultrafast speed, I want to cancel to go back to 200 Mbps (before the 30 day no-penalty period expires).
Accepted Solution
user_6dd336
Visitor
•
5 Messages
7 m ago
I contacted Xfinity support and they verified there was nothing wrong with the connection or the modem. I finally figured out that the problem was with a 'media prioritization' setting on my router. Turning that off (as recommended for download speeds > 200), I now have fast speed from the router (800-900/24). A little embarrassed that I didn't note that earlier!🙄
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EG
Expert
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95K Messages
7 m ago
@user_6dd336
Please redact all of the CM MAC and the CMTS MAC addresses in your error log entries for your privacy. They are considered to be personal information. Personally identifying information is a violation of their forum guidelines. The forum bot will not allow your post to be seen publically. It flagged your post as "Private".
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EG
Expert
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95K Messages
7 m ago
@user_6dd336
Please also post the signal status figures.
Please copy all of the text in its entirety of the *Downstream Power Levels*, the *SNR's* (Signal to Noise Ratios), and the *Upstream Power Level* numbers and paste them into your next post.
Also, what speed do you get with the computer connected directly to the MB8611 cable modem (no router / WiFi in the mix) ?
(edited)
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user_6dd336
Visitor
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5 Messages
7 m ago
Sorry about the mixup with error log entries - I deleted all of that from the original post.
Here is signal status information. Link speed Receive/Transmit is 1000/1000 Mbps. According to Xfinity speed test, download speed is 358 Mbps, upload is 20.1.
Downstream Bonded Channels
Channel
Lock Status
Modulation
Channel ID
Freq. (MHz)
Pwr (dBmV)
SNR (dB)
Corrected
Uncorrected
1
Locked
QAM256
33
627.0
0.4
42.3
0
0
2
Locked
QAM256
13
507.0
-0.2
42.7
0
0
3
Locked
QAM256
14
513.0
-0.4
42.6
0
0
4
Locked
QAM256
15
519.0
-0.4
42.6
0
0
5
Locked
QAM256
16
525.0
-0.5
42.6
0
0
6
Locked
QAM256
17
531.0
-0.5
42.5
0
0
7
Locked
QAM256
18
537.0
-0.5
42.3
0
0
8
Locked
QAM256
19
543.0
-0.4
42.6
0
0
9
Locked
QAM256
20
549.0
-0.3
42.6
0
0
10
Locked
QAM256
21
555.0
-0.5
42.4
0
0
11
Locked
QAM256
22
561.0
-0.2
42.5
0
0
12
Locked
QAM256
23
567.0
-0.4
42.3
0
0
13
Locked
QAM256
24
573.0
-0.1
42.4
0
0
14
Locked
QAM256
25
579.0
-0.3
42.3
0
0
15
Locked
QAM256
26
585.0
-0.2
42.4
0
0
16
Locked
QAM256
27
591.0
-0.1
42.3
0
0
17
Locked
QAM256
28
597.0
-0.3
42.3
0
0
18
Locked
QAM256
29
603.0
0.2
42.3
0
0
19
Locked
QAM256
30
609.0
-0.4
42.1
0
0
20
Locked
QAM256
31
615.0
0.3
42.4
0
0
21
Locked
QAM256
32
621.0
-0.4
42.1
0
0
22
Locked
QAM256
34
633.0
-0.4
41.9
0
0
23
Locked
QAM256
35
639.0
0.2
42.1
0
0
24
Locked
QAM256
36
645.0
-0.3
41.9
0
0
25
Locked
QAM256
37
651.0
0.1
42.1
0
0
26
Locked
QAM256
38
657.0
0.0
42.1
0
0
27
Locked
QAM256
39
663.0
0.0
42.1
0
0
28
Locked
QAM256
40
669.0
0.4
42.4
0
0
29
Locked
QAM256
41
675.0
0.0
41.7
0
0
30
Locked
QAM256
42
681.0
0.6
42.4
0
0
31
Locked
QAM256
43
687.0
0.0
42.3
0
0
32
Locked
QAM256
44
693.0
0.6
42.4
0
0
33
Locked
OFDM PLC
159
722.0
1.3
41.8
1728542
0
Upstream Bonded Channels
Channel
Lock Status
Channel Type
Channel ID
Symb. Rate (Ksym/sec)
Freq. (MHz)
Pwr (dBmV)
1
Locked
SC-QAM
1
5120
16.4
45.0
2
Locked
SC-QAM
2
5120
22.8
44.5
3
Locked
SC-QAM
3
5120
29.2
45.5
4
Locked
SC-QAM
4
5120
35.6
44.5
5
Locked
SC-QAM
5
2560
40.4
45.0
0
0
EG
Expert
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95K Messages
7 m ago
We still needed to see the log entries minus those MAC addys. I asked you to just delete those MAC addy's, not the entire output...
And what about this part: " Also, what speed do you get with the computer connected directly to the MB8611 cable modem (no router / WiFi in the mix) ?"
(edited)
1
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EG
Expert
•
95K Messages
7 m ago
Download and try this speed test: https://www.speedtest.net/apps/windows See what you get with it.
It does not run via any browser so it is not affected by any browser impairments / bottlenecks.
So, even though the signal stats looked o/k at that snapshot in time, the error log entries confirm that something is going on. Perhaps there is noise ingress into the line(s) / an upstream channel-return path impairment somewhere.
There are other signal stat figures that can't be read by the modem. They are the "Upstream Rx Power" (Upstream Receive Power Level), the "Upstream SNR Ch." (Upstream Signal To Noise Ratio), and the "Upstream ICFR" (In Channel Frequency Response). These are as equally important in diagnosing connectivity issues as are the modem's stats.
In the meantime, I'm going to escalate your issue to the Comcast corporate employees that are available to these boards. They can check the CMTS (Cable Modem Termination System) for any real time degradation and / or error reports, see your node / cable plant and modem health, and see whether or not everything is in the green zone. They can also see a history plot for the modem and poll for those upstream receive signal stats.
You should get a reply here in your topic. Good luck !
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