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Help needed, Gigabit internet only getting 350-400Mbps

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New Poster

Help needed, Gigabit internet only getting 350-400Mbps

I'm looking for advice/help. I tried the standard troubleshooting (reset modem, use different CAT6 cables, connect straight to modem, used laptop and desktops).. I've seen 800-900Mbps usually right after rebooting modem. Otherwise I'm at 350Mbps down, 40Mbps up on my 1Gb plan. Day time, night time (midnight) still gives 350Mbps ish, sometimes 160Mbps.

 

Spoke to various Comcast tech support employees who said anything from "your modem is the problem", to "maybe it's the lines in your neighborhood". So it's going nowhere. 

 

I had 250Mbps plan before and it worked just fine. A comcast tech checked my connections a few months ago and everything was solid. 

Netgear CM1000 Firmware 3.01.04

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

<tabindex=-1>Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 603000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enable BPI+
IP Provisioning Mode Honor MDD IPv6 only

<tabindex=-1>Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords
1 Locked QAM256 33 603000000 Hz 6.3 dBmV 37.7 dB 1084704091 0 0
2 Locked QAM256 1 609000000 Hz 6.2 dBmV 37.4 dB 1083457643 0 0
3 Locked QAM256 2 615000000 Hz 6.2 dBmV 37.5 dB 1083466563 0 0
4 Locked QAM256 3 621000000 Hz 6.1 dBmV 37.5 dB 1083477655 0 0
5 Locked QAM256 4 627000000 Hz 6.2 dBmV 37.4 dB 1083466563 0 0
6 Locked QAM256 5 633000000 Hz 6.3 dBmV 37.3 dB 1083495897 0 0
7 Locked QAM256 6 639000000 Hz 6.1 dBmV 37.3 dB 1083505595 0 0
8 Locked QAM256 7 645000000 Hz 5.9 dBmV 37.2 dB 1083514558 0 0
9 Locked QAM256 8 651000000 Hz 6.0 dBmV 37.3 dB 1083530338 0 0
10 Locked QAM256 9 657000000 Hz 6.0 dBmV 37.2 dB 1083538863 0 0
11 Locked QAM256 10 663000000 Hz 6.0 dBmV 37.2 dB 1083549227 0 0
12 Locked QAM256 11 669000000 Hz 5.7 dBmV 37.0 dB 1083557861 0 0
13 Locked QAM256 12 675000000 Hz 5.5 dBmV 36.5 dB 1083568201 0 0
14 Locked QAM256 13 681000000 Hz 5.5 dBmV 36.9 dB 1083577951 0 0
15 Locked QAM256 14 687000000 Hz 5.7 dBmV 36.8 dB 1083586223 0 0
16 Locked QAM256 15 693000000 Hz 5.5 dBmV 36.9 dB 1083603947 1 0
17 Locked QAM256 17 513000000 Hz 8.1 dBmV 38.5 dB 1083635964 0 0
18 Locked QAM256 18 519000000 Hz 8.0 dBmV 38.6 dB 1083645174 0 0
19 Locked QAM256 19 525000000 Hz 7.8 dBmV 38.6 dB 1083654536 0 0
20 Locked QAM256 20 531000000 Hz 7.6 dBmV 38.3 dB 1083663627 0 0
21 Locked QAM256 21 537000000 Hz 7.3 dBmV 38.2 dB 1083673994 0 0
22 Locked QAM256 22 543000000 Hz 7.0 dBmV 38.2 dB 1083674439 0 0
23 Locked QAM256 23 549000000 Hz 6.9 dBmV 38.1 dB 1083700696 0 0
24 Locked QAM256 24 555000000 Hz 6.9 dBmV 38.0 dB 1083685391 0 0
25 Locked QAM256 26 561000000 Hz 6.8 dBmV 38.0 dB 1083674618 0 0
26 Locked QAM256 27 567000000 Hz 6.5 dBmV 37.9 dB 1083683577 0 0
27 Locked QAM256 28 573000000 Hz 6.3 dBmV 37.9 dB 1083693332 0 0
28 Locked QAM256 29 579000000 Hz 6.3 dBmV 37.7 dB 1083702149 0 0
29 Locked QAM256 30 585000000 Hz 6.3 dBmV 37.6 dB 1083711674 0 0
30 Locked QAM256 31 591000000 Hz 6.2 dBmV 37.6 dB 1083720762 0 0
31 Locked QAM256 32 597000000 Hz 6.1 dBmV 37.6 dB 1083728307 0 0
32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 0

<tabindex=-1>Upstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power
1 Locked ATDMA 17 17300000 Hz 32.0 dBmV
2 Locked ATDMA 18 23700000 Hz 32.3 dBmV
3 Locked ATDMA 19 30300000 Hz 32.8 dBmV
4 Locked ATDMA 20 36700000 Hz 33.3 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

<tabindex=-1>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 25 813000000 Hz 3.0 dBmV 34.8 dB 1108 ~ 2987 76356047 72176110 0
2 Not Locked 0 0 0 Hz 10.1 dBmV 0.0 dB 0 ~ 4095 0 0 0

<tabindex=-1>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

 

Contributor

Re: Help needed, Gigabit internet only getting 350-400Mbps

Does your computers support gig service?Go to the network setting and check that you LAN port is set to 1.0Gb.

Expert

Re: Help needed, Gigabit internet only getting 350-400Mbps


matt4952 wrote:

Does your computers support gig service?Go to the network setting and check that you LAN port is set to 1.0Gb.


Were it set to 10/100 how could they even be getting 350-400 ?

 

And they stated this;

 

"I've seen 800-900Mbps usually right after rebooting modem."



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New Poster

Re: Help needed, Gigabit internet only getting 350-400Mbps

So a few days later after my post, my speed slowly went up to 900Mbps. So this is no longer a problem. Maybe it does take a few days since activation for everything to get in place..