Gigabit Speeds

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RogersCilio
Retired Moderator
Retired Moderator
Posts: 390

Re: Gigabit Speeds

Hey @umlee168,
 
Welcome to the Rogers Community Forums.
 

I can definitely understand how annoying it must be to deal with intermittent speed issues. My understanding of the T3 timeout errors, is that it's a normal functionality of the modem communicating with the CMTS, termination system even though it's logged as a critical error.

 

Usually, the modem documents it when it doesn't receive response to 16 ranging requests.  Generally, you can ignore them but in your case, because they're happening quite frequently, it could potentially be pointing to a noise issue, which may require us to take a closer look.

 

For now, I'll tag in a few of our Resident Experts for their input, @gp-se @Datalink @Gdkitty, what do you fellas think?

 

Cheers,

RogersCilio

umlee168
I'm Here A Lot
Posts: 6

Re: Gigabit Speeds

Hi guys. A quick update here. I thought maybe I got a bad modem here so I just exchanged for another one. Once again the results are the same. Here's some info to help you guys out. Let me know what I should try out or if I should contact Rogers again and persuade them to bring a technician to check things out. Thanks.

 

System Info

Hardware Version

2A

Software Version

2.0.10.34T6

 

Speedtest.net - tested at 05/06/2018 1:19PM

Snipaste_2018-05-06_13-20-08.png

 

DOCSIS LOGS

No.

Time

Type

Priority

Event

1

01/01/1970 00:01:10

82000200

critical

No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

2

01/01/1970 00:01:50

84000500

critical

SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

3

01/01/1970 00:01:02

82000200

critical

No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

4

05/06/2018 18:02:18

90000000

warning

MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

5

05/06/2018 18:02:25

69010200

notice

SW Download INIT - Via Config file bac102000106f81d0f8196c0

6

05/06/2018 18:03:05

69011200

notice

SW download Successful - Via Config file

7

05/06/2018 18:14:55

90000000

warning

MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

8

05/06/2018 18:19:01

82000200

critical

No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

9

05/06/2018 18:20:36

84000500

critical

SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

10

05/06/2018 18:21:00

82000200

critical

No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

11

05/06/2018 18:21:04

84000500

critical

SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

 

DOCSIS WAN

DOCSIS Overview

 

Network Access

Permitted

IP Address

 

Subnet Mask

255.255.252.0

Gateway IP Address

 

DHCP Lease Time

😧 00 H: 00 M: 47 S: 20

Downstream Overview

 

 

 

 

 

Port ID

Frequency (MHz)

Modulation

Signal strength (dBmV)

Channel ID

Signal noise ratio (dB)

1

591000000

256QAM

5.000

7

38.983

2

855000000

256QAM

-0.400

3

36.387

3

861000000

256QAM

-0.500

4

36.610

4

579000000

256QAM

4.900

5

38.605

5

585000000

256QAM

5.200

6

38.605

6

849000000

256QAM

-0.100

2

36.387

7

597000000

256QAM

5.000

8

38.983

8

603000000

256QAM

4.800

9

38.983

9

609000000

256QAM

5.000

10

38.605

10

615000000

256QAM

4.900

11

38.605

11

621000000

256QAM

4.700

12

38.983

12

633000000

256QAM

5.000

13

38.605

13

639000000

256QAM

5.300

14

38.605

14

645000000

256QAM

5.000

15

37.636

15

651000000

256QAM

5.200

16

37.636

16

657000000

256QAM

5.300

17

37.636

17

663000000

256QAM

5.700

18

38.605

18

669000000

256QAM

5.600

19

38.605

19

675000000

256QAM

5.500

20

38.605

20

681000000

256QAM

5.900

21

38.605

21

687000000

256QAM

5.900

22

38.983

22

693000000

256QAM

5.900

23

38.605

23

699000000

256QAM

6.200

24

38.605

24

705000000

256QAM

5.800

25

38.605

25

711000000

256QAM

5.700

26

38.983

26

717000000

256QAM

5.600

27

38.605

27

723000000

256QAM

5.300

28

38.605

28

825000000

256QAM

1.100

29

36.610

29

831000000

256QAM

0.900

30

36.610

30

837000000

256QAM

0.800

31

36.610

31

843000000

256QAM

0.300

32

36.387

32

303000000

256QAM

3.600

1

37.356

OFDM Downstream Overview

 

 

 

 

 

 

Receiver

FFT type

Subcarr 0 Frequency(MHz)

PLC locked

NCP locked

MDC1 locked

PLC power(dBmv)

0

4K

290600000

YES

YES

YES

4.400002

1

NA

NA

NO

NO

NO

NA

Upstream Overview

 

 

 

 

 

Port ID

Frequency (MHz)

Modulation

Signal strength (dBmV)

Channel ID

Bandwidth

1

23700000

ATDMA - 16QAM

29.250

5

6400000

2

38596000

ATDMA - 16QAM

34.500

6

3200000

3

30596000

ATDMA - 16QAM

31.000

4

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

gp-se
Resident Expert
Resident Expert
Posts: 1,129

Re: Gigabit Speeds


@umlee168 wrote:

Hi guys. A quick update here. I thought maybe I got a bad modem here so I just exchanged for another one. Once again the results are the same. Here's some info to help you guys out. Let me know what I should try out or if I should contact Rogers again and persuade them to bring a technician to check things out. Thanks.

 

System Info

Hardware Version

2A

Software Version

2.0.10.34T6

 

Speedtest.net - tested at 05/06/2018 1:19PM

Snipaste_2018-05-06_13-20-08.png

 

DOCSIS LOGS

No.

Time

Type

Priority

Event

1

01/01/1970 00:01:10

82000200

critical

No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

2

01/01/1970 00:01:50

84000500

critical

SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

3

01/01/1970 00:01:02

82000200

critical

No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

4

05/06/2018 18:02:18

90000000

warning

MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

5

05/06/2018 18:02:25

69010200

notice

SW Download INIT - Via Config file bac102000106f81d0f8196c0

6

05/06/2018 18:03:05

69011200

notice

SW download Successful - Via Config file

7

05/06/2018 18:14:55

90000000

warning

MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

8

05/06/2018 18:19:01

82000200

critical

No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

9

05/06/2018 18:20:36

84000500

critical

SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

10

05/06/2018 18:21:00

82000200

critical

No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

11

05/06/2018 18:21:04

84000500

critical

SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

 

DOCSIS WAN

DOCSIS Overview

 

Network Access

Permitted

IP Address

 

Subnet Mask

255.255.252.0

Gateway IP Address

 

DHCP Lease Time

😧 00 H: 00 M: 47 S: 20

Downstream Overview

 

 

 

 

 

Port ID

Frequency (MHz)

Modulation

Signal strength (dBmV)

Channel ID

Signal noise ratio (dB)

1

591000000

256QAM

5.000

7

38.983

2

855000000

256QAM

-0.400

3

36.387

3

861000000

256QAM

-0.500

4

36.610

4

579000000

256QAM

4.900

5

38.605

5

585000000

256QAM

5.200

6

38.605

6

849000000

256QAM

-0.100

2

36.387

7

597000000

256QAM

5.000

8

38.983

8

603000000

256QAM

4.800

9

38.983

9

609000000

256QAM

5.000

10

38.605

10

615000000

256QAM

4.900

11

38.605

11

621000000

256QAM

4.700

12

38.983

12

633000000

256QAM

5.000

13

38.605

13

639000000

256QAM

5.300

14

38.605

14

645000000

256QAM

5.000

15

37.636

15

651000000

256QAM

5.200

16

37.636

16

657000000

256QAM

5.300

17

37.636

17

663000000

256QAM

5.700

18

38.605

18

669000000

256QAM

5.600

19

38.605

19

675000000

256QAM

5.500

20

38.605

20

681000000

256QAM

5.900

21

38.605

21

687000000

256QAM

5.900

22

38.983

22

693000000

256QAM

5.900

23

38.605

23

699000000

256QAM

6.200

24

38.605

24

705000000

256QAM

5.800

25

38.605

25

711000000

256QAM

5.700

26

38.983

26

717000000

256QAM

5.600

27

38.605

27

723000000

256QAM

5.300

28

38.605

28

825000000

256QAM

1.100

29

36.610

29

831000000

256QAM

0.900

30

36.610

30

837000000

256QAM

0.800

31

36.610

31

843000000

256QAM

0.300

32

36.387

32

303000000

256QAM

3.600

1

37.356

OFDM Downstream Overview

 

 

 

 

 

 

Receiver

FFT type

Subcarr 0 Frequency(MHz)

PLC locked

NCP locked

MDC1 locked

PLC power(dBmv)

0

4K

290600000

YES

YES

YES

4.400002

1

NA

NA

NO

NO

NO

NA

Upstream Overview

 

 

 

 

 

Port ID

Frequency (MHz)

Modulation

Signal strength (dBmV)

Channel ID

Bandwidth

1

23700000

ATDMA - 16QAM

29.250

5

6400000

2

38596000

ATDMA - 16QAM

34.500

6

3200000

3

30596000

ATDMA - 16QAM

31.000

4

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


@umlee168

Your upstream level are too low, you will require a tech visit to correct the signal levels. However looking at your speeds I wouldn't be surprised if there is more issues causing the slow speeds. I would call into tech support and ask them to check for noise on your Node/CMTS and to do a speed test on your neighbours connection to rule out if the slow speeds only effect you, or your neighbours also.

 



umlee168
I'm Here A Lot
Posts: 6

Re: Gigabit Speeds

@gp-se

Thanks for the info. I called tech support again and they did try testing the other homes near mine and it looks to be an isolated case. A technician has been booked for Thursday, May 10 in hopes of correcting this problem at my home.  In the meantime, the support person did something to the modem to give me speeds I can live with until Thursday arrives. Will let you guys know how it goes.

 

 

Gdkitty
Resident Expert
Resident Expert
Posts: 14,288

Re: Gigabit Speeds

I do agree I wonder if there is noise or something else.

While a lot of the signal levels are will within spec.. they appear to be all over the place.  
EG: mine fluctuate, but you sort of see it go up and down relatively smoothly increment/decrease.
Yours seems to jump up/down from one channel to the next rather large in some cases.



umlee168
I'm Here A Lot
Posts: 6

Re: Gigabit Speeds

The Rogers technician came and did some tests. He was able to see the fast speeds after the modem factory reset, but the extremely slow speeds a couple minutes afterwards. They took the modem outside an connected it directly to the box at the end of the street and said the slow speeds are still there. They said Rogers maintenance needs to come fix the problem and said they will come within 48 hours. The speeds are now even slower than before. Talk about frustration. Will let you guys know what happens next.

 

Speedtest.net - tested at 05/10/2018 11:00AM

Snipaste_2018-05-10_11-00-26.png

 

DOCSIS LOGS

 

16

05/10/2018 15:49:56

84000500

critical

SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CM-QOS=1.1;CM-VER=3.1;

17

05/10/2018 15:50:00

82000200

critical

No Ranging Response received - T3 time-out;CM-MAC=;CM-QOS=1.1;CM-VER=3.1;

18

05/10/2018 15:51:19

84000500

critical

SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CM-QOS=1.1;CM-VER=3.1;

19

05/10/2018 15:51:21

82000200

critical

No Ranging Response received - T3 time-out;CM-MAC=;CM-QOS=1.1;CM-VER=3.1;

20

05/10/2018 16:00:51

84000500

critical

SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CM-QOS=1.1;CM-VER=3.1;

 
DOCSIS WAN

Downstream Overview

 

 

 

 

 

Port ID

Frequency (MHz)

Modulation

Signal strength (dBmV)

Channel ID

Signal noise ratio (dB)

1

591000000

256QAM

3.800

7

38.605

2

855000000

256QAM

-1.900

3

35.595

3

861000000

256QAM

-2.000

4

35.780

4

579000000

256QAM

3.800

5

38.983

5

585000000

256QAM

4.100

6

38.605

6

849000000

256QAM

-1.600

2

35.780

7

597000000

256QAM

3.900

8

38.605

8

603000000

256QAM

3.600

9

38.605

9

609000000

256QAM

3.800

10

38.605

10

615000000

256QAM

3.700

11

38.983

11

621000000

256QAM

3.500

12

38.605

12

633000000

256QAM

4.000

13

37.636

13

639000000

256QAM

4.100

14

37.356

14

645000000

256QAM

3.800

15

37.356

15

651000000

256QAM

4.100

16

37.636

16

657000000

256QAM

4.200

17

37.356

17

663000000

256QAM

4.600

18

37.636

18

669000000

256QAM

4.500

19

37.636

19

675000000

256QAM

4.300

20

37.636

20

681000000

256QAM

4.900

21

38.605

21

687000000

256QAM

4.700

22

38.605

22

693000000

256QAM

4.800

23

38.605

23

699000000

256QAM

5.100

24

38.983

24

705000000

256QAM

4.600

25

38.605

25

711000000

256QAM

4.600

26

38.605

26

717000000

256QAM

4.400

27

38.983

27

723000000

256QAM

4.000

28

37.636

28

825000000

256QAM

-0.400

29

36.610

29

831000000

256QAM

-0.600

30

36.610

30

837000000

256QAM

-0.700

31

36.387

31

843000000

256QAM

-1.200

32

36.387

32

303000000

256QAM

2.800

1

37.356

OFDM Downstream Overview

 

 

 

 

 

 

Receiver

FFT type

Subcarr 0 Frequency(MHz)

PLC locked

NCP locked

MDC1 locked

PLC power(dBmv)

0

4K

290600000

YES

YES

YES

3.400002

1

NA

NA

NO

NO

NO

NA

Upstream Overview

 

 

 

 

 

Port ID

Frequency (MHz)

Modulation

Signal strength (dBmV)

Channel ID

Bandwidth

1

30596000

ATDMA - 16QAM

31.250

4

6400000

2

38596000

ATDMA - 16QAM

35.000

6

3200000

3

23700000

ATDMA - 16QAM

30.000

5

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

 
 

 

Abhi1
I've Been Here Awhile
Posts: 2

Re: Gigabit Speeds

Am having issues with speed too (am on a 500 u plan and have the white Hitron modem). Am usually clocking out in the low 100s (and in 50s on wireless). Would be great if someone could advise here based on the log below?

 

Here is my DOCSIS Log

 

DOCSIS WAN

This menu displays both upstream and downstream signal parameters

DOCSIS Overview
Downstream Overview
Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID Signal noise ratio (dB)
1 597000000 256QAM -2.300 8 37.636
2 849000000 256QAM -2.800 2 37.636
3 855000000 256QAM -2.900 3 37.636
4 861000000 256QAM -3.300 4 37.636
5 579000000 256QAM -2.600 5 37.636
6 585000000 256QAM -2.800 6 37.636
7 591000000 256QAM -2.700 7 37.356
8 303000000 256QAM 0.100 1 37.356
9 603000000 256QAM -2.500 9 38.605
10 609000000 256QAM -2.700 10 37.636
11 615000000 256QAM -2.500 11 37.636
12 621000000 256QAM -2.500 12 37.636
13 633000000 256QAM -2.900 13 37.636
14 639000000 256QAM -2.700 14 37.356
15 645000000 256QAM -2.600 15 37.636
16 651000000 256QAM -2.600 16 37.636
17 657000000 256QAM -2.600 17 37.636
18 663000000 256QAM -2.100 18 37.636
19 669000000 256QAM -2.200 19 37.356
20 675000000 256QAM -2.100 20 37.636
21 681000000 256QAM -2.300 21 37.356
22 687000000 256QAM -2.200 22 37.636
23 693000000 256QAM -2.300 23 37.636
24 699000000 256QAM -2.000 24 37.636
25 705000000 256QAM -2.100 25 37.636
26 711000000 256QAM -2.300 26 37.356
27 717000000 256QAM -2.600 27 37.636
28 723000000 256QAM -2.900 28 37.356
29 825000000 256QAM -2.300 29 37.636
30 831000000 256QAM -2.300 30 37.636
31 837000000 256QAM -2.500 31 37.636
32 843000000 256QAM -2.500 32 37.636
OFDM Downstream Overview
Receiver FFT type Subcarr 0 Frequency(MHz) PLC locked NCP locked MDC1 locked PLC power(dBmv)
0 NA NA NO NO NO NA
1 4K 275600000 YES YES YES 0.000000
Upstream Overview
Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID Bandwidth
1 30596000 ATDMA - 64QAM 32.000 1 6400000
2 38596000 ATDMA - 64QAM 33.500 3 3200000
3 23700000 ATDMA - 64QAM 32.000 2 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
Datalink
Resident Expert
Resident Expert
Posts: 7,132

Re: Gigabit Speeds

@Abhi1 is the modem running in Gateway mode or Bridge mode?  If its in Bridge mode run a factory reset on your router and after the router reboot, disable everything in the router except for the firewall and DOS protection.  Reboot the router and run a speedtest using the www.speedtest.net Toronto Rogers or Montreal Rogers servers.  The Toronto Rogers server is a 10 Gb/s server fwiw, so it has the horsepower to run high speed tests.  Not sure of the Montreal server, but, from Ottawa, it produces the same results data rates as the Toronto server with less latency. 

 

Your DOCSIS 3.0 signal levels aren't terrible.  Certainly acceptable, as are the signal to noise ratios.  Thats a moot point as the modem is running DOCSIS 3.1 on the Downstream side, as seen in the OFDM Downstream section.  The upstream DOCSIS 3.0 signal levels are typical of what we see on this modem, so, their ok.  

 

The question is, what are the signal to noise ratios for the Downstream OFDM channel, which isn't shown, and what are the upstream signal to noise ratios at the CMTS, which you can see.  If you called Tech Support they should be able to tell you if those numbers are in an acceptable range.  

 

Can you let me know what mode the modem is running in and whether or not you are using a router as well? 



Abhi1
I've Been Here Awhile
Posts: 2

Re: Gigabit Speeds

Thanks for the help and info.

 

Am running without a router in getaway mode

Datalink
Resident Expert
Resident Expert
Posts: 7,132

Re: Gigabit Speeds

@Abhi1, correction to my post above, which should read:

 

"....what are the upstream signal to noise ratios at the CMTS, which you can't see."

 

Ok, fwiw, there are a group of customers who experience slower than expected data rates with the CODA-4582 modem.  That modem uses DOCSIS 3.1 on the downstream side, which usually will result in very good performance on the downstream side.  For some reason, either due to OFDM processing in the modem, or possibly noise in the OFDM channel, the modem does not perform as expected.  Recent posts have shown that there are noise problems for some of the affected customers.  That has come to light during tech visits.  So, my thoughts at the present time are that you need a tech visit to determine what the problem is with the OFDM channel which resides below or above 300 Mhz, not sure which at the present time.  Fwiw, the lower frequencies in the cable network are susceptible to noise ingress problems, so, if this turned out to the problem, I wouldn't be surprised.