CODA-4582 - Open Issues for Investigation

[RogersDave]

*** This post was last edited May 2, 2017 ***

Good morning Community,

As I mentioned in a post two days ago, we have received the next firmware 2.0.10.20 from Hitron. We are currently running initial testing on this version and will push it out to participants in the firmware trial program as soon as it passes initial testing.

However, while running these tests, we discovered abnormal behavior with ICMP and are awaiting feedback from Hitron today to asses how this will be addressed. As soon as I this is confirmed, I’ll update the change log with the correct version information and start pushing it out.

In parallel, we are still working on the following high priority items. In some cases below, I requested affected customers to reach out to me via private message. If you do so, please include your modem MAC address in the subject line (even if we exchange messages daily) as there are a lot of you reaching out to me daily 🙂

UDP Packet Loss

The investigation for what has been reported as UDP packet loss is still ongoing. We have deployed a probe at one fellow forum member on both a CODA-4582 and a CGNM-3552 to collect additional data. We are actively working with Hitron and Intel on the results observed.

Based on what we know so far, in most instances UDP packet loss is coupled with higher uplink usage in the area. Although the impact is noticeable in specific logs (League of Legends), the root cause for the perceivable impact (while playing) is likely related to bufferbloat (see next issue).

Bufferbloat

When comparing the performance of a CODA-4582 to a CGNM-3552 in the same network conditions, the CODA-4582 consistently reports higher bufferbloat when tested on DSLReports.

Update April 12: The solution for this problem will come in two folds. It will require a change in software which will possibly be included in 2.0.10.27 but more likely in 2.0.10.28 and a change in network configuration.

The network configuration change is not compatible with the current firmware so this change will only come after a vast majority of the modems are running the new code. We are however looking at a way to make the change only for specific modems to support testing in the community.

Update April 22: This problem seems resolved in firmware 2.0.10.27

5 GHz WiFi Low range for channels 36 to 48

Lower WiFi channels on the modem have a much smaller range. This is due in part to the limit imposed by Industry Canada to maximum transmit power.

Furthermore, the current automatic channel selection (auto mode) tends to select the lower channels when in similar load conditions.

Workaround: manually select higher channels (149-153-157-161)

Update April 22: The channel selection algorithm has been improved in firmware 2.0.10.27

Loss of OFDM Channel Lock

Under some RF conditions, the modem fails to lock properly on the OFDM channel. This typically result in variable performance.

Update April 12: This problem is resolved in 2.0.10.26T2

List of connected device does not get fully populated

This is a known issue that has been tracked since firmware 2.0.10.13. We are making improvements at every firmware but it is not a perfect system.

The situation is worst after a reboot or firmware upgrade as the list gets reset and must be repopulated as devices renew their DHCP lease.

NAT Loopback not working for wired clients

When setting up port forwarding to an internal server, it is possible for a client on WiFi to reach the server using the external IP/port. If the client is on a wired interface, it doesn't work.

Update April 12: This problem is resolved in 2.0.10.26T2 (not confirmed)

LAN Counters not working

Some customers reported that LAN counters (especially in bridge mode) are reporting inaccurate values.

This problem has been reported to Hitron for investigation.

Unexpected modem reboot

Some customers reported their modem reboots unexpectedly. We have also seen this behavior in our lab.

Update April 12: This problem is resolved in 2.0.10.26T2

Missing SC-QAM Channels

After a reboot, some modems are missing SC-QAM channels. A fix has been implemented in 2.0.10.26T2 to address this behavior but it has not corrected all scenarios.

Investigation continues with Hitron.

WiFi Survey

The WiFi Survey functionality in firmware 2.0.10.26T2 (and possibly before) reports incorrect SSID names.

Guest Network

When connecting to the Guest Network, an error message is displayed "only allow DHCP client to use this wireless".  This has been reported in firmware 2.0.10.26T2.

Update April 22: This issue has been resolved in firmware 2.0.10.27

Update May 2: It seems this issue is not fully resolved and still experienced by some users

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Future Planned Improvements

The following are items that we are working on in parallel of the above.

• Improvement in WiFi speeds
• Improvement in latency / bufferbloat

Dave

*Edited Labels*

[Telek]

---

@Gdkitty wrote:

Randomly, a good chunck of the devices.. would not be connected.. well they would connect to the wifi.. but not getting an IP address properly..
Anything which had a STATIC IPv4 addres, was fine.
The issue seemed to be with devices which were on dynamic.. and getting both IPv4 and IPv6 addresses?
And from what i could find.. very little control over the v6 DHCP in the modem itself?

There are known issues with inactivity and the DHCP server stops working.

Correct, the modem is ill-equipped to handle IPV6. Combined with local devices now getting public IPV6 addresses I think this is extremely concerning. Many (most?) IoT style devices have basically zero security. Placing these on public addresses is going to be a disaster for security.

[tonytoronto]

  If i remember correctly, IPv6 can be disabled in the wireless settings, for wireless devices and theres also some settings under Firewall related to IPv6. I been lucky i guess, all my devices work ok.

---

@Mythen wrote:
I have the same issue with my pixel XL. Frequent disconnects since IP v6 was enabled. Anyone have any suggestions to fix this

---

[Triple_Helix]

---

@Triple_Helix wrote:

---

@Mythen wrote:
I have the same issue with my pixel XL. Frequent disconnects since IP v6 was enabled. Anyone have any suggestions to fix this

---

@RogersDave I'm having the same disconnects with my Moto Z Phone as well since IPv6 so I don't think it's only the Pixel XL.

Also my Upload has not been great as well since IPv6 has been enabled. I was getting over 40Mbps before.

---

My Uploads have improved since my last post! 

Downstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	591000000	256QAM	4.000	31	37.636
2	363000000	256QAM	0.700	10	37.636
3	369000000	256QAM	1.500	11	37.636
4	375000000	256QAM	1.000	12	37.356
5	381000000	256QAM	0.300	13	37.356
6	387000000	256QAM	0.800	14	37.356
7	393000000	256QAM	1.100	15	37.636
8	399000000	256QAM	1.600	16	37.356
9	405000000	256QAM	1.600	17	37.356
10	411000000	256QAM	1.700	18	37.636
11	417000000	256QAM	2.300	19	37.636
12	423000000	256QAM	2.800	20	37.636
13	429000000	256QAM	2.800	21	37.636
14	435000000	256QAM	2.000	22	37.636
15	441000000	256QAM	2.200	23	37.636
16	447000000	256QAM	2.100	24	37.356
17	555000000	256QAM	4.200	25	38.605
18	561000000	256QAM	4.500	26	37.636
19	567000000	256QAM	5.000	27	38.605
20	573000000	256QAM	4.300	28	38.605
21	579000000	256QAM	4.800	29	38.605
22	585000000	256QAM	4.400	30	37.356
23	357000000	256QAM	0.800	9	37.356
24	597000000	256QAM	3.900	32	37.636
25	603000000	256QAM	4.500	33	37.636
26	609000000	256QAM	5.600	34	37.636
27	615000000	256QAM	5.900	35	37.636
28	621000000	256QAM	6.100	36	37.636
29	633000000	256QAM	5.700	37	37.356
30	639000000	256QAM	4.800	38	37.636
31	645000000	256QAM	4.000	39	37.356
32	651000000	256QAM	3.800	40	36.844

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	30596000	ATDMA - 64QAM	40.500	1	6400000
2	38596000	ATDMA - 64QAM	42.750	3	3200000
3	23700000	ATDMA - 64QAM	39.500	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

© 2017 Hitron Technologies Inc.. All rights reserved.

[dallasdinatake]

I am hoping it get fixed because I just ran a speed test and got 2.06 download speed upload speed is fine

[JohnBeaudin]

Since Ipv6 was deployed my modem is rebooting on it's own every night.

[Triple_Helix]

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@JohnBeaudin wrote:

Since Ipv6 was deployed my modem is rebooting on it's own every night.

---

Not here.

[JohnBeaudin]

On Beta .24 I was getting 3days+ of uptime! but since the introduction of IPV6 it reboot during the night, not sure if it's related or if it's just a coincidence. I will continue to monitor.

[tonytoronto]

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@JohnBeaudin wrote:

On Beta .24 I was getting 3days+ of uptime! but since the introduction of IPV6 it reboot during the night, not sure if it's related or if it's just a coincidence. I will continue to monitor.

---

  Like clockwork, around 6.20PM and 4.20 am would get reboots. I did full reset, had to setup wireless again (some settings stayed) and its been up for almost  2 days.

  If u dont mind possibly wasting some time, try a full reset.

[gp-se]

@JohnBeaudin

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@JohnBeaudin wrote:

On Beta .24 I was getting 3days+ of uptime! but since the introduction of IPV6 it reboot during the night, not sure if it's related or if it's just a coincidence. I will continue to monitor.

---

Probably just a coincidence. A few days before .24 my modem was rebooting almost every night. I think Rogers is doing work/tweaking the CMTS causing the modem to reboot. 

[gp-se]

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@tonytoronto wrote:

  If i remember correctly, IPv6 can be disabled in the wireless settings, for wireless devices and theres also some settings under Firewall related to IPv6. I been lucky i guess, all my devices work ok.

---

@Mythen wrote:
I have the same issue with my pixel XL. Frequent disconnects since IP v6 was enabled. Anyone have any suggestions to fix this

---

---

@tonytoronto

You cannot disable IPV6, even under the firewall settings you can disable http access, but the phone is still getting an ipv6 address.

[Jelllo]

Unable to browse websites while downloading.

I recently upgraded to the new Rogers Hitron CODA-4582 and while it is faster than the CGN3, I am unable to browse any website while downloading in the background.  I connect to Usenet and use about 60 threads and get around 95 MB/s which is a bit faster than the CGN3, but websites fail to load with the error "This website took too long to respond".  With the CGN3 I would get about 85 MB/s but websites opened in a snap and I could download files, with my Usenet speed dropping (this is how it is supposed to work) I looked in the 4582 and I don't see any options for QOS (I think that is what it is called) 

I have a fast computer with multiple Samsung 950 Pro drives. I don't use a router and am at a loss at what is going on.

[mubashir56]

Hello All

My purchased CGN3 modem died  a couple of days ago so I got myself CODA-4582.

Upon running it from the past two days I notice that compared to the 5 GHz band, the 2.4 is really slow (down to 10 Mbps at times. I get over 300 Mbps If I use 5 GHz!!

Is this normal?? I understand that compared to 2.4, the 5 GHz band has a shorter range but should they not be transmitting radio signals at the same speed?

I was not having this issue with the CGN3 that died.

Thanks.

[Alance]

Hi all,

I have been encountering the same network issues recently, resulting in a number of CODA-4582 modem replacements. Some replacements are better than others but the problems generally remain the same. I have the Ignite 250u package, and my download speeds regularly reach max speed, however when I ping a website, or perform a speed test on the Rogers speed test page, I have jitter that varies from 4ms to 70ms+. I also appear to be experiencing packet loss. Often times this makes gaming or streaming a truly terrible experience as whatever I am doing will intermittently stop or fail, resulting in rubber banding or misfires in online games, and sudden stops in buffering/streaming. I've noticed that some other users post their DOCSIS WAN information, and looking over their information in relation to mine, it seems like my Upstream Signal Strength is lower than most of the other users.

Here is my information below:

Downstream Overview
Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID Signal noise ratio (dB)
1 591000000 256QAM -1.800 7 38.983
2 567000000 256QAM -1.000 3 38.605
3 573000000 256QAM -1.100 4 38.605
4 579000000 256QAM -0.600 5 38.983
5 585000000 256QAM -1.600 6 38.983
6 561000000 256QAM -0.700 2 38.605
7 597000000 256QAM -0.900 8 38.605
8 603000000 256QAM -1.300 9 38.605
9 609000000 256QAM -2.000 10 38.605
10 615000000 256QAM -1.700 11 38.983
11 621000000 256QAM -1.200 12 38.983
12 633000000 256QAM -1.100 13 38.605
13 639000000 256QAM -1.300 14 38.983
14 645000000 256QAM -1.200 15 38.605
15 651000000 256QAM -1.500 16 38.605
16 657000000 256QAM -0.700 17 38.983
17 663000000 256QAM -0.600 18 38.983
18 669000000 256QAM -0.700 19 38.983
19 675000000 256QAM -1.100 20 38.983
20 681000000 256QAM -0.900 21 38.605
21 687000000 256QAM -1.400 22 38.605
22 693000000 256QAM -1.300 23 38.983
23 699000000 256QAM -0.400 24 38.983
24 705000000 256QAM -1.900 25 38.605
25 711000000 256QAM -2.500 26 38.983
26 717000000 256QAM -1.800 27 38.605
27 723000000 256QAM -1.600 28 38.983
28 825000000 256QAM -3.000 29 38.983
29 831000000 256QAM -2.500 30 38.983
30 837000000 256QAM -3.200 31 38.605
31 843000000 256QAM -3.300 32 38.605
32 555000000 256QAM -1.000 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 -1.000000
1 NA NA NO NO NO NA
Upstream Overview
Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID Bandwidth
1 23700000 ATDMA - 64QAM 31.250 2 6400000
2 38596000 ATDMA - 64QAM 35.250 3 3200000
3 30596000 ATDMA - 64QAM 31.250 1 6400000

Is there an issue with my upstream that could be causing my jitter and packet loss? If not, is there anything I can do to improve my experience? I am wired into the Ethernet port with the Wireless networks disabled. The CODA-4582 has firmware 2.0.10.24.

Thank you all for your time.

[Jelllo]

I would like to add that all computers on my network have the same problem not being able to open a webpage while downloading.

[RyzenFX]

I'm also suffering the same issue as you, jitter varies, sudden stops while streaming, and packet loss.

Is there some sort of UDP latency w/ the CODA 4582?

I currently have a ticket open srating that noise on my node is causing my upload speed to take a dip, aswell as jitter. It's very annoying during peak hours where noise is the most- and I have yet to get and update stating that they've fixed it. @RogersDave

[huuu]

can someone analyze my coda modem stats here? i only get 450mbps max...no where close to 1gig speeds..do i have low signals that need a tech to repair or its within specs

thanks

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	591000000	256QAM	-3.400	7	35.595
2	561000000	256QAM	-1.400	2	36.387
3	567000000	256QAM	-2.100	3	36.610
4	573000000	256QAM	-1.800	4	36.610
5	579000000	256QAM	-2.400	5	36.387
6	585000000	256QAM	-2.900	6	36.610
7	555000000	256QAM	-1.300	1	36.610
8	597000000	256QAM	-3.700	8	35.595
9	603000000	256QAM	-3.700	9	35.780
10	609000000	256QAM	-5.000	10	35.595
11	615000000	256QAM	-4.900	11	35.595
12	621000000	256QAM	-4.000	12	35.780
13	633000000	256QAM	-3.900	13	36.610
14	639000000	256QAM	-4.000	14	36.387
15	645000000	256QAM	-4.100	15	36.610
16	651000000	256QAM	-4.100	16	36.610
17	657000000	256QAM	-4.900	17	35.780
18	663000000	256QAM	-5.300	18	35.595
19	669000000	256QAM	-5.500	19	35.084
20	675000000	256QAM	-5.600	20	35.084
21	681000000	256QAM	-5.400	21	35.595
22	687000000	256QAM	-5.600	22	35.780
23	693000000	256QAM	-5.500	23	35.780
24	699000000	256QAM	-5.300	24	35.595
25	705000000	256QAM	-5.600	25	35.084
26	711000000	256QAM	-6.400	26	35.084
27	717000000	256QAM	-6.200	27	34.926
28	723000000	256QAM	-7.000	28	33.957
29	825000000	256QAM	-6.800	29	35.084
30	831000000	256QAM	-7.600	30	34.926
31	837000000	256QAM	-6.800	31	35.084
32	843000000	256QAM	-6.200	32	35.595

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	-1.099998

Upstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Bandwidth
1	38595785	ATDMA - 64QAM	38.750	3	3200000
2	30596000	ATDMA - 64QAM	35.000	1	6400000
3	23700000	ATDMA - 64QAM	33.000	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

[Gdkitty]

While they are 'within spec', they are still in the low side.  Might account for SOME, but not all of the issue.

Where are you doing the speed test on? (rogers one or a 3rd party, and what endpoint server then)

And wired or wireless?

[lethalsniper]

Same issue here on .24 firmware, high pings/latency all day , gaming online with Xbox one just horrible also we have to Xbox one consoles and one of them can find 5g but the other cant ? @RogersDave

[huuu]

speedtest.net rogers server in toronto

http://speedtest-tor1.digitalocean.com/

speedcheck.rogers.com

all this is wired...cat6 cable ..doesn't matter if its straight from my router or coda modem...same speeds

coda in gateway mode  and coda bridged to my router = same speeds (no difference)

[lethalsniper]

@RogersDave I have swapped my coda modem 2 days ago and now none of my device detect wireless 5-g I have changed wireless name , reboot

[Triple_Helix]

Now this sucks why even bother with the Gigabit service? http://communityforums.rogers.com/t5/forums/forumtopicpage/board-id/Getting_connected/thread-id/4316...