Ignite Internet Gigabit - Slow Speeds

[m3rked]

i haven't been able to speed test higher than 500mbps with a wired connection, I am on a gigabit connection.

Downstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	591000000	256QAM	4.200	7	38.983
2	855000000	256QAM	0.600	3	38.605
3	861000000	256QAM	1.000	4	38.605
4	579000000	256QAM	4.600	5	38.983
5	585000000	256QAM	4.900	6	38.605
6	849000000	256QAM	0.300	2	38.983
7	597000000	256QAM	3.600	8	40.366
8	603000000	256QAM	3.800	9	38.605
9	609000000	256QAM	3.300	10	38.983
10	615000000	256QAM	3.500	11	38.983
11	621000000	256QAM	3.400	12	38.983
12	633000000	256QAM	3.700	13	38.605
13	639000000	256QAM	3.100	14	38.983
14	645000000	256QAM	3.100	15	38.983
15	651000000	256QAM	2.700	16	38.605
16	657000000	256QAM	2.200	17	38.605
17	663000000	256QAM	2.200	18	38.983
18	669000000	256QAM	2.900	19	38.983
19	675000000	256QAM	3.200	20	38.983
20	681000000	256QAM	3.400	21	38.983
21	687000000	256QAM	4.300	22	38.983
22	693000000	256QAM	3.600	23	38.983
23	699000000	256QAM	4.500	24	38.983
24	705000000	256QAM	3.700	25	38.983
25	711000000	256QAM	4.000	26	38.983
26	717000000	256QAM	3.500	27	38.983
27	723000000	256QAM	3.100	28	38.983
28	825000000	256QAM	1.700	29	38.605
29	831000000	256QAM	0.800	30	38.983
30	837000000	256QAM	0.500	31	38.605
31	843000000	256QAM	0.100	32	38.605
32	279000000	256QAM	-0.300	1	37.356

OFDM Downstream Overview

Receiver	FFT type	Subcarr 0 Frequency(MHz)	PLC locked	NCP locked	MDC1 locked	PLC power(dBmv)
0	4K	275600000	YES	YES	YES	1.500000
1	NA	NA	NO	NO	NO	NA

Upstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Bandwidth
1	25300000	ATDMA - 64QAM	39.250	6	3200000
2	36996000	ATDMA - 64QAM	35.250	8	6400000
3	22100000	ATDMA - 64QAM	38.000	5	3200000
4	30596000	ATDMA - 64QAM	35.250	7	6400000

OFDM/OFDMA Overview

Channel Index	State	lin Digital Att	Digital Att	BW (sc's*fft)	Report Power	Report Power1_6	FFT Size
0	DISABLED	0.5000	0.0000	0.0000	-inf	-1.0000	4K
1	DISABLED	0.5000	0.0000	0.0000	-inf	-1.0000	4K

*Added Labels*

[Keepps65 · Accepted solution]

Hi, thanks for this.  I had a weird situation where two high-end PCs were stuck getting no more than 200 mbps on my gigabit connection, but my old Mac (using the same ethernet cable and switch) and my Apple TV were getting 900 mbps.  All using the SpeedTest app.  I reloaded drivers, reset the network, but nothing changed.

My tcp autotuning level was set to "disabled".  I changed it to Normal and it fixed it.  I then switched it to Experimental for good measure and it stayed fixed.

My only guess is that either Windows changed this on both PCs or some app did (possibly Private Internet Access).

Anyway, thanks for the tip, problem solved!   

[Datalink]

@m3rked your signal levels look fine, however, not all of the OFDM channel signal data is presented to the user, so that leaves the user in a position of not having enough data to assess the health of the OFDM channel.  Call tech support and as the Customer Service Rep to run a signal check on the modem and ask specifically if the DOCSIS 3.1 OFDM parameters are within spec.  The CSR has to hunt for those as they aren't presented along with the upper DOCSIS 3.0 parameters.  

Your modem is using the DOCSIS 3.1 OFDM channel on the downstream side, so, the question of the day is whether or not the OFDM channel is operating correctly and being processed correctly.  

What is your test platform, desktop or laptop?  

And, how are you connecting to the modem, via ethernet cable, or via gigabit ethernet to (USB 3 or USB Type C) adapter?

[m3rked]

I run the tests on a laptop with a gigabit card using a cat5e cable

[Datalink]

Have you ever seen that laptop run over 500 Mb/s with a previous modem or anywhere else?

[m3rked]

I had 25mbps service before so no I haven't.

[Datalink]

Ok, only thing I can think of, modem wise, is to call tech support and ask the Customer Service Rep to run a signal check and ask specifically if the OFDM channel parameters are within spec.  

Also ask the CSR if the modem is provisioned for gigabit service, not the 500 Mb/s service. 

For the laptop, if you happen to have any friends that own a gaming laptop or perhaps a workstation class laptop, invite the laptop over for a test, the friend is optional.

Or, if you know of anyone who has proven gigabit service running, invite you and your laptop over for a test session.  A bribe usually works in cases such as this.  

In either event, you need to prove that the modem can provide gigabit service, either with someone else's laptop or with your own laptop when you've been able to prove that it will run at data rates over 500 Mb/s.

Fwiw, we had a ultrabook laptop at one point that wouldn't run over 200 Mb/s, wired or wifi.  The problem with laptops is that running high data rates will usually require a gaming laptop or workstation class laptop.  Run of the mill consumer class laptops may or may not cut it when it comes to higher data rates, and, the manufacturers usually won't point this out.  Laptop owners usually determine this on their own, when they subscribe to higher data rates 😞

[m3rked]

@Datalink  I appreciate your help on the matter, I contacted rogers and it according to them their services have issues with ookla based speed tests. When tested using fast.com it shows i am getting full speeds.

[Datalink]

@m3rked try google's fibre speed test just to see what you get for results:  http://speed.googlefiber.net/

[m3rked]

The google fiber speed test will spike up to around 650 then drop in speed to 250

[os3rules]

Speed Question

Hi all.  I have a question regarding how the rogers modem works.

I have the HiTron CGN3 model with Rogers 1 GIG plan.  After talking to Rogers support recently they said that everything is working fine when I have only 335 Meg download on my laptop and 500 Meg download on my phone because the combined speed is as fast as I can expect.

I understand that the combined speed of my devices cannot exceed the 1 Gig of my service, but why is it that my wired Ethernet connection to my laptop is so slow?  If there is no other activity on the line (everything was disconnected and the laptop directly connected to the router), then why is this happening? 

Does this router "split" the bandwidth between wired and wireless connection, even if there is no wireless activity, and vise versa?  Would my laptop run faster with a wireless connection?

Further - if I run the router is bridge mode, would I get the same results? 

Thanks in advance.