Re: Gigabit Speeds

RogersCilio · ‎05-06-2018

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 · ‎05-06-2018

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

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 · ‎05-07-2018

@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

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 · ‎05-07-2018

@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 · ‎05-08-2018

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 · ‎05-10-2018

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

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 · ‎05-13-2018

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 · ‎05-13-2018

@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 · ‎05-13-2018

Thanks for the help and info.

Am running without a router in getaway mode

Datalink · ‎05-13-2018

@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.

Gigabit Speeds

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