Internet Keeps Dropping

[Pguy]

I tried unplugging modem and 3rd party router.

This problem seems to happen more frequently. I am now entering the info into my phone (notes) - time/day of disconnection and duration.

It went down Tuesday and now today. I don't recall how long it was out last time. Maybe 30 min or 1 hr total?

I also use a wifi Smart TV.

It has reconnected a few times only to drop 5 mins (estimate) later. Sometimes the speed is normal but often, the connection is at a much lower speed suggesting a problem.

I am wondering if there's an issue.

*Added Labels*

[Datalink]

@JK6399 talk about absolutely frustrating.  Ok, @RogersTony @RogersAndy @RogersMoin @RogersCorey the ball is in your court .........

[augmentium]

@tulowindow

What router do you have? There are a number of more advanced settings on the router that can be tried. I’m no expert, just went to SNB Forums and did some asking & reading. However if you’re having the same problems in gateway mode, then it’s probably something else.

[JohnGM]

@tulowindo try not using bridge mode and not using router. Connect directly to modem by Ethernet cable if you can

[lethalsniper]

My internet also dropped around 2 am in the Donmills area.

[micha3615]

The 2am drop I've been told is normal since that's when they do firmware upgrade...

But for me the issue started way back in September, I've had about 8 Techs come to my house, 4 senior tech, escalation to the presidents office and I finally gave up and I've been using a different provider until they fix their issue.

Notice this post last night and confirmed  OFDMA upload has been disabled, I would guess this was done yesterday for me so will keep an eye out on this.

[88dalejrfan]

The only drop I've had since OFDMA was disabled was a short burst of 3 drops, lasting 3-5 seconds, around 2:15 AM last night. Not sure if this is normal (like a middle of the night update as often happens with the cable box). Unlike previous drops, it was not accompanied by a massive latency spike upon resumption. 

[markhamdad]

I too have been experiencing internet disconnection since Nov/Dec which happened a lot during office calls via skype or MS team. It's often embarrassing to explain to my colleagues especially when I hosted it or in the middle of my speaking. It usually lasted for 1-3 minutes, then reconnected without me rebooting the modem.  I have been monitoring this thread and I'm glad Roger seemed to finally read/listen to this forum message and disabled the OFDM/OFDMA.  Hopefully, this will end the saga of the random internet disconnection. Question:  

1) My Hitron CODA 4582 Modem (white) shows 2 light blues with the OFDM/OFDMA are now disabled .  Is this what should I see?  I put the modem in gateway mode. 

OFDM/OFDMA Overview

Channel Index	State	lin Digital Att	Digital Att	BW (sc's*fft)	Report Power	Report Power1_6	FFT Size
0	DISABLED	0.0000	0.0000	0.0000	0.0000	0.0000	2K
1	DISABLED	0.0000	0.0000	0.0000	0.0000	0.0000	2K

2) My signal strength on channel ID# 1 now looks low compared to other channels, but its SNR seems normal at 38.605.  Will this imply an issue in terms of internet stability or speed?

Downstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	591000000	QAM256	4.900	7	38.983
2	597000000	QAM256	4.699	8	38.983
3	603000000	QAM256	4.699	9	38.605
4	609000000	QAM256	5.099	10	38.983
5	579000000	QAM256	4.199	5	38.983
6	585000000	QAM256	4.500	6	38.605
7	279000000	QAM256	0.599	1	38.605
8	615000000	QAM256	5.400	11	38.983
9	621000000	QAM256	5.500	12	38.983
10	633000000	QAM256	6.000	13	38.983
11	639000000	QAM256	6.099	14	38.983
12	645000000	QAM256	6.300	15	38.983
13	651000000	QAM256	6.500	16	38.983
14	657000000	QAM256	6.599	17	38.605
15	663000000	QAM256	6.300	18	38.983
16	669000000	QAM256	6.199	19	38.983
17	675000000	QAM256	6.199	20	38.605
18	681000000	QAM256	6.199	21	38.983
19	687000000	QAM256	6.500	22	38.605
20	693000000	QAM256	6.800	23	38.983
21	699000000	QAM256	6.500	24	38.983
22	705000000	QAM256	6.199	25	38.605
23	711000000	QAM256	6.599	26	38.983
24	717000000	QAM256	6.199	27	38.605
25	723000000	QAM256	6.199	28	38.605
26	825000000	QAM256	6.900	29	38.605
27	831000000	QAM256	6.300	30	38.605
28	837000000	QAM256	5.800	31	37.355
29	843000000	QAM256	5.400	32	37.636
30	849000000	QAM256	5.300	2	37.636
31	855000000	QAM256	5.099	3	38.605
32	861000000	QAM256	4.599	4	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	NA	NA	NO	NO	NO	NA

Upstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Bandwidth
1	38700000	64QAM	41.520	8	6400000
2	21100000	64QAM	42.010	5	3200000
3	32300000	64QAM	41.770	7	6400000
4	25900000	64QAM	41.270	6	6400000
5	0	QAM_NONE	-	---	1600000
6	0	QAM_NONE	-	---	1600000
7	0	QAM_NONE	-	---	1600000
8	0	QAM_NONE	-	---	1600000

[PizzaBear]

@tulowindow

I checked a few of your posts but you are just not providing enough technical details to even get suggestions from people on this forum.

Are you connected by Lan cable or wifi?
Can you ping your gateway and see how the latency is.
Can you post your cable modem signal page reading.

[beejaam]

@ Datalink, I have the same issue that my modem drops for the last few months. I do have a PC connected thru ethernet and that drops as well along with wifi devices. I read thru your posts here and found probably that could me the cause in my case. 

I have white CODA-4582 model. I recently did factory reset as an option to resolve the issue.  Software version is 7.1.1.33. Below is the data table that you have requested in your post.  Let me know if can figure out what is the issue here.

Downstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	591000000	QAM256	-4.900	7	38.605
2	597000000	QAM256	-5.200	8	38.605
3	603000000	QAM256	-4.900	9	38.983
4	855000000	QAM256	-7.099	3	38.605
5	861000000	QAM256	-7.299	4	37.636
6	579000000	QAM256	-4.799	5	35.972
7	585000000	QAM256	-4.900	6	38.605
8	849000000	QAM256	-7.099	2	37.636
9	609000000	QAM256	-4.900	10	38.983
10	615000000	QAM256	-5.200	11	38.983
11	621000000	QAM256	-5.200	12	38.605
12	633000000	QAM256	-5.099	13	38.983
13	639000000	QAM256	-5.099	14	38.983
14	645000000	QAM256	-5.000	15	38.983
15	651000000	QAM256	-4.900	16	38.983
16	657000000	QAM256	-5.000	17	38.983
17	663000000	QAM256	-4.900	18	38.983
18	669000000	QAM256	-4.900	19	38.983
19	675000000	QAM256	-4.900	20	38.983
20	681000000	QAM256	-5.000	21	38.983
21	687000000	QAM256	-5.000	22	38.605
22	693000000	QAM256	-5.000	23	38.605
23	699000000	QAM256	-5.000	24	38.605
24	705000000	QAM256	-5.099	25	38.983
25	711000000	QAM256	-5.200	26	38.605
26	717000000	QAM256	-5.299	27	38.605
27	723000000	QAM256	-5.599	28	38.983
28	825000000	QAM256	-6.400	29	38.605
29	831000000	QAM256	-6.500	30	37.636
30	837000000	QAM256	-6.599	31	37.636
31	843000000	QAM256	-6.799	32	37.355
32	279000000	QAM256	-3.900	1	38.983

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	-4.200001
1	NA	NA	NO	NO	NO	NA

Upstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Bandwidth
1	32300000	64QAM	37.020	3	6400000
2	38700000	64QAM	37.270	4	6400000
3	21100000	64QAM	35.760	1	3200000
4	25900000	64QAM	37.020	2	6400000
5	0	QAM_NONE	-	---	1600000
6	0	QAM_NONE	-	---	1600000
7	0	QAM_NONE	-	---	1600000
8	0	QAM_NONE	-	---	1600000

OFDM/OFDMA Overview

Channel Index	State	lin Digital Att	Digital Att	BW (sc's*fft)	Report Power	Report Power1_6	FFT Size
0	OPERATE	0.2052	10.8467	9.6000	42.7815	35.0000	2K
1	DISABLED	0.0000	0.0000	0.0000	0.0000	0.0000	2K

[amerfandi]

I have big problem with the internet and it’s affected to my work it keep disconnected every minutes connect and disconnected. I need help as soon as possible

[WorldIRC123]

Anyone else losing access to 192.168.100.1 since OFDMA was disabled?

I’m in bridge mode. I can reboot and gain access but after several hours the address no longer connects. Internet works fine though.

[augmentium]

@WorldIRC123

It’s the opposite for me. I have no problem accessing it since OFDMA was disabled. I could only occasionally access it before.

[Spiritwood]

How do you ping your gateway and see how the latency is from a Mac?

How do you post your cable modem signal page reading?

[WorldIRC123]

@augmentium I just did a factory reset of the modem and will keep bridge mode off.  

That being said, the factory reset seems to have re-enabled OFDMA.  Jeez.  Hopefully it gets turned back off. 

[augmentium]

@WorldIRC123. Maybe try rebooting the modem. Mine is in bridge mode & OFDMA is still disabled. The lease time was changed just after midnight to 7 days. The previous lease hadn’t expired, so I assume there was a modem update then. If it’s not in bridge mode you should access the modem at 192.168.10.1.

[WorldIRC123]

Well I kept rebooting the modem. But I lost access to it after a short while. So I’ve reset it and have bridge mode off for now. We’ll see if I maintain access. That being said with OFDMA being turned back on I suspect the other issues will return.

[WorldIRC123]

And just like that I’ve already had my first one minute outage since OFDMA being reenabled.

[doctor80]

The big question now is - what happens when there will be software update to the modem. will it enable back to OFDMA?

What happens if I decide to factory reset the modem, will it enable back the OFDMA?

If the answer is yes, what would be the best and quickest method to disable it again?

@Datalink  any clue?

[WorldIRC123]

I’ve had three blips since OFDMA was reenabled due to my modem factory reset. So frustrating.

[Darios]

Hi there ,

I've started to experience intermittent IP drops, Rogers Coda -4082 in bridge -> Asus modem... ; Did you guys did find a root cause by any chance ? ...Coda firmware issue ?   Thank you for any suggestions...Im not sure where to start ...

[Darios]

HI There,

I experiencing similar issues / dropped IP / on my Coda Rogers modem...Did anyone find a root cause ?  firmware upgrade maybe ?   Thank you for any help....