poor modem speed

[glennkelly]

cm1200 modem getting less than half of the 600mbs speed promised comcast said they can't change a third party product and i must contact netgear for the solution. i sent a support request 3 days ago with no response. i've upgraded from cm500 to the cm1200, as recommended. no change. the router speed is the same as the modem speed. any help out there? gksharron@gmail.com

[plemans]

So you're paying for 600mbps?

What device are you testing with? 

When you directly connect to the modem to test speeds, is any other device plugged into it? 

What website are you using for testing? 

do you have a screen snip of the cable connetions page? 

Have you had them (xfinity) re-provision it? 

[glennkelly]

So you're paying for 600mbps?   yes

What device are you testing with?   speedtest.xfinity and speedtest via the Nighthawk R7000P router that's connected to the modem.

When you directly connect to the modem to test speeds, is any other device plugged into it?  i have connected directly to the modem, but speed is same as router. no other devices were on.

What website are you using for testing? Firefox and Safari

do you have a screen snip of the cable connetions page?  where is that page to be found?

Have you had them (xfinity) re-provision it?   i have reset modem, restarted modem, reactivated modem... re-provosion is a no. haven't been able to talk to a live person. close as i get is a live chat. no help there. was told to call netgear, because they can't go into 3rd party product for changes.

[plemans]

---

@glennkelly wrote:

So you're paying for 600mbps?   yes

What device are you testing with?   speedtest.xfinity and speedtest via the Nighthawk R7000P router that's connected to the modem.

When you directly connect to the modem to test speeds, is any other device plugged into it?  i have connected directly to the modem, but speed is same as router. no other devices were on.

What website are you using for testing? Firefox and Safari

do you have a screen snip of the cable connetions page?  where is that page to be found?----When you're logged into the modem, click on the cable connection/internet connection icon. it shows the connections back to the isp. 

Have you had them (xfinity) re-provision it?   i have reset modem, restarted modem, reactivated modem... re-provosion is a no. haven't been able to talk to a live person. close as i get is a live chat. no help there. was told to call netgear, because they can't go into 3rd party product for changes.----xfinity is great at blaming 3rd party devices. But there isn't anything to "change in the settings". Either the modem is provisioned correctly by the ISP or it isn't. If its provisioned correctly and the signal is good, the modem will get the speeds. 

---

[glennkelly]

i appreciate your suggestions & comments. thanks. i am awaiting a call back from xfinity. i will ask for the re-provision thing.

[FURRYe38]

Be sure the LAG feature on the modem is disabled. 

[glennkelly]

is this what you meant by LAG? 

Ethernet Port Aggregation Status: Inactive

[vkdelta]

pls post CM Event log + Connection page to show the signal levels and logs

[glennkelly]

Cable Connection

Frequency start Value
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
Starting Frequency

 
Startup Procedure
Procedure
Status
Comment
Acquire Downstream Channel
489000000 Hz
Locked
Connectivity State
OK
Operational
Boot State
OK
Operational
Security
Enabled
BPI+
IP Provisioning Mode
Honor MDD
honorMdd(4)
 
Downstream Bonded Channels
Channel
Lock Status
Modulation
Channel ID
Frequency
Power
SNR
Correctables
Uncorrectables
1
Locked
QAM256
2
489000000 Hz
7.7 dBmV
40.7 dB
0
0
2
Locked
QAM256
3
495000000 Hz
7.6 dBmV
40.8 dB
0
0
3
Locked
QAM256
4
501000000 Hz
7.7 dBmV
40.9 dB
0
0
4
Locked
QAM256
5
507000000 Hz
7.4 dBmV
40.9 dB
0
0
5
Locked
QAM256
6
513000000 Hz
7.2 dBmV
40.8 dB
0
0
6
Locked
QAM256
7
519000000 Hz
7.2 dBmV
41 dB
0
0
7
Locked
QAM256
8
525000000 Hz
7.1 dBmV
41 dB
0
0
8
Locked
QAM256
9
531000000 Hz
7.1 dBmV
41 dB
0
0
9
Locked
QAM256
10
537000000 Hz
6.8 dBmV
40.9 dB
0
0
10
Locked
QAM256
11
543000000 Hz
6.7 dBmV
40.9 dB
0
0
11
Locked
QAM256
12
549000000 Hz
6.4 dBmV
40.8 dB
0
0
12
Locked
QAM256
13
555000000 Hz
5.8 dBmV
40.6 dB
0
0
13
Locked
QAM256
14
561000000 Hz
5.9 dBmV
40.7 dB
0
0
14
Locked
QAM256
15
567000000 Hz
5.9 dBmV
40.8 dB
0
0
15
Locked
QAM256
16
573000000 Hz
5.6 dBmV
40.7 dB
0
0
16
Locked
QAM256
17
579000000 Hz
5.5 dBmV
40.6 dB
0
0
17
Locked
QAM256
18
585000000 Hz
5.5 dBmV
40.5 dB
0
0
18
Locked
QAM256
19
591000000 Hz
5.6 dBmV
40.6 dB
0
0
19
Locked
QAM256
20
597000000 Hz
6 dBmV
40.8 dB
0
0
20
Locked
QAM256
21
603000000 Hz
6.1 dBmV
40.8 dB
0
0
21
Locked
QAM256
22
609000000 Hz
6.1 dBmV
40.8 dB
0
0
22
Locked
QAM256
23
615000000 Hz
5.9 dBmV
40.7 dB
0
0
23
Locked
QAM256
24
621000000 Hz
6 dBmV
40.8 dB
0
0
24
Locked
QAM256
25
627000000 Hz
6 dBmV
40.9 dB
0
0
25
Locked
QAM256
26
633000000 Hz
6 dBmV
41 dB
0
0
26
Locked
QAM256
27
639000000 Hz
5.9 dBmV
41 dB
0
0
27
Locked
QAM256
28
645000000 Hz
6 dBmV
41.1 dB
0
0
28
Locked
QAM256
29
651000000 Hz
5.9 dBmV
41 dB
0
0
29
Locked
QAM256
30
657000000 Hz
6 dBmV
41 dB
0
0
30
Locked
QAM256
31
663000000 Hz
6.1 dBmV
41.1 dB
0
0
31
Locked
QAM256
32
669000000 Hz
6 dBmV
41 dB
0
0
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
1
5120 Ksym/sec
35600000 Hz
38 dBmV
2
Locked
ATDMA
2
5120 Ksym/sec
29200000 Hz
38 dBmV
3
Locked
ATDMA
3
5120 Ksym/sec
22800000 Hz
37.8 dBmV
4
Locked
ATDMA
4
5120 Ksym/sec
16400000 Hz
37.8 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
37
690000000 Hz
6.5 dBmV
40.8 dB
1228 ~ 2867
203233685
124286484
0
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
 
Extended Upstream Transmit Power
Enable Extended Upstream Transmit Power
 
Current System Time:Wed Aug 05 19:14:46 2020
System Up Time:08:18:28

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[vkdelta]

this looks provisioning issue. signals levels are

Pls PM me your CM MAC/Account #/Account Holders name/phone.

will check with Comcast OPS team