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CODA-4582 - Open Issues for Investigation

RogersDave
Retired Support
Retired Support

*** 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


 

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*

2,620 REPLIES 2,620

Re: CODA-4582 - Open Issues for Investigation

Dave, there was a noise on my node, confirmed / fixed.

I can PM you more info about it (in case you need it / details - as i have them).
There is no more packet loss, however;

I am still facing a lot slower speeds compared to previous firmware versions.


I did try couple of times to factory reset the modem, that did not help.

I tried gateway mode, that did not help.


I tried different times of the day, same outputs, even 3am-7am.

 

If you have any  other ideas / if you require any specific tests, please let me know which / what, and i will provide it.


Thanks,

Damir

Re: CODA-4582 - Open Issues for Investigation

Thanks for actually testing that, I appreciate it Dave!

Re: CODA-4582 - Open Issues for Investigation

DaveFro
I Plan to Stick Around

Thanks for all the info RogersDave! I sent you a PM with more details about the below.

 

I appear to be missing channels 22 and 23.... 

 

ScreenShot3.jpg

Re: CODA-4582 - Open Issues for Investigation

toolcubed
I'm a Senior Contributor

So if we're running our CODA modems in bridge mode, we should never experience the intereference since WiFi is completely disabled.  Is that right?  Or would you still recommend that we swap our modems out for the newer version (with the black dot)?

Re: CODA-4582 - Open Issues for Investigation


@toolcubed wrote:

So if we're running our CODA modems in bridge mode, we should never experience the intereference since WiFi is completely disabled.  Is that right?  Or would you still recommend that we swap our modems out for the newer version (with the black dot)?


It could still be affected in some cases, especially if your router is right beside your modem. Now to be clear, it's really a subset of modems that have this issue. In your case, I just reviewed your modem and don't see any sign of this impact.

 

As part of the trial firmware program, I do monitor more closely the performance of the modems. I will be contacting via private message, likely next week, everybody who is part of this program and could benefit from a modem swap.

 

Dave

 

 

Re: CODA-4582 - Open Issues for Investigation

hptouchdroid13
I Plan to Stick Around

CODA .19.PNG

 

Here is my speedtest. I just got the CODA yesterday and it got .19 firmware last night. 

Re: CODA-4582 - Open Issues for Investigation

gbssengo
I Plan to Stick Around

@hptouchdroid13 wrote:

CODA .19.PNG

 

Here is my speedtest. I just got the CODA yesterday and it got .19 firmware last night. 


Lucky you.

 

wow.png

 

This is mine. on firmware .19

Re: CODA-4582 - Open Issues for Investigation


@RogersDave wrote:

@gp-se wrote:

What are the symptoms of the interference issue? How would a user know if he is afftected by this.

@gp-se, It is hard for end users to detect this situation but it may be possible in some cases.

 

In the DOCSIS Status page, there could be missing channel (the channel ID column will completely skip a number). In some cases, there will be some channels with a SNR really low (10 to 15). There are also cases where none of the above shows a problem.

 

We are running scans on the network to flag affected modem and I'll be in contact with some of you to expedite a replacement.

 


@Alex4161 wrote:
@RyzenFX @RogersDave

What are the causes of this tuner interference? Is it related to placement, bad splitter, wiring, amps on the line?

thanks

@Alex4161, As stated previously, the interference is generally internal to the modem where 2.4 GHz WiFi can leak into the DOCSIS tuner and affect certain frequencies. This only affects a subset of modems but the newer generation modems (with a black dot) have extra protection against that.

 


@Double_K wrote:

@RyzenFX, thanks!

Did the FCC ID / IC number change on the back of the modem?

How does it have better shielding from interference?


@Double_K, There is no other indication, no difference in FCC ID or hardware revision. It strictly has an extra shield on top of the DOCSIS tuner.

 

Dave


I just checked my modem, all 32 channels and SNR between 38-40, so I'm guessing I am good. 

Re: CODA-4582 - Open Issues for Investigation

hoob
I Plan to Stick Around

Random Friday evening prime time speed check on Rogers Speed Test:

 

Firmware .19

Uptime 38 hours

Friday the 13th 19h40 prime time stream-oclock

DOCSIS 3.0 4 of 32 download channels offline due to wifi interference issue

Download Speed: 671Mbps

Upload Speed: 26Mbps

Latency: 7ms

Jitter: 4ms

 

Things are looking good! No gradual or suddent modem slow downs as far as I can tell, however the modem reboot 38 hours ago was unsolicited.

 

 

Re: CODA-4582 - Open Issues for Investigation

toolcubed
I'm a Senior Contributor
Thanks Dave.

Re: CODA-4582 - Open Issues for Investigation

14N
I Plan to Stick Around

Is Rogers recalling the first coda due to interference issue?

Re: CODA-4582 - Open Issues for Investigation

toolcubed
I'm a Senior Contributor
Dave,

Last night I decided to run some speed tests while I was wired directly to my RT-AC68U (CODA in bridge mode) and I couldn't break past 50M down and 3-5M up (I'm on the 100u plan). Usually I pull 200 down and 11-12 up. After I ran the slow speed tests, I checked my DOCSIS stats on the modem and everything was fine...signal levels were great as usual and no missing channels. Was the cause of the slow speed test due to local node congestion or could my CODA be exhibiting some form of interference?

Re: CODA-4582 - Open Issues for Investigation


@toolcubed wrote:
Dave,

Last night I decided to run some speed tests while I was wired directly to my RT-AC68U (CODA in bridge mode) and I couldn't break past 50M down and 3-5M up (I'm on the 100u plan). Usually I pull 200 down and 11-12 up. After I ran the slow speed tests, I checked my DOCSIS stats on the modem and everything was fine...signal levels were great as usual and no missing channels. Was the cause of the slow speed test due to local node congestion or could my CODA be exhibiting some form of interference?

 

How far is your Asus from the CODA? Also is your speed consistanly low with your CODA/Asus, or just last night doing tests? If you have an interference issue, I would assume speed tests would be slow all the time. Make sure you keep your Asus at least 6 FEET from the CODA, and run some more tests, if speeds improve, then move the Asus closer to the CODA, if speeds drop then you have an interference issue.

 

Re: CODA-4582 - Open Issues for Investigation

arrago
I Plan to Stick Around

I think, I'm starting to see conguestion in my area + Coda issues  you guys speak of here. Over time I notice the modem slows down. (speeds of 100mbps). Also if you don't reboot games stutter like crazy best way to describe it. Signals are good, so maybe chipset bug?? 

 

Anyways today sat I'm getting full speeds....

 

(as close as i'd get it without having rogers newest wiring in the area anyways)

 

451.76 mbps (max i've seen is 700 none existant on this coda modem 600 seems my max it can hit)

54.23mbps

ping 8ms

jitter 3ms

 

2nd test

558.63Mbps

54.16Mbps

ping 4ms

jitter 3ms

 

**Added Signal Levels**

DHCP Lease Time😧 07 H: 00 M: 00 S: 00
Downstream Overview
Port IDFrequency (MHz)ModulationSignal strength (dBmV)Channel IDSignal noise ratio (dB)
1615000000256QAM0.8003538.983
2363000000256QAM0.9001038.983
3369000000256QAM0.5001138.605
4375000000256QAM0.9001238.983
5381000000256QAM1.0001338.983
6387000000256QAM1.6001438.983
7393000000256QAM1.7001540.366
8399000000256QAM1.3001640.366
9405000000256QAM1.0001738.983
10411000000256QAM0.9001838.983
11417000000256QAM1.0001938.983
12423000000256QAM1.4002038.983
13429000000256QAM1.5002138.605
14435000000256QAM1.9002238.983
15441000000256QAM2.0002340.366
16447000000256QAM1.8002438.983
17555000000256QAM-1.2002537.356
18561000000256QAM-2.3002637.356
19567000000256QAM-3.9002737.356
20573000000256QAM-2.5002837.356
21579000000256QAM-0.5002938.605
22585000000256QAM0.3003038.983
23591000000256QAM0.5003138.983
24597000000256QAM0.5003238.983
25603000000256QAM0.7003338.983
27357000000256QAM1.400938.605
28621000000256QAM0.4003638.983
29633000000256QAM0.4003738.983
30639000000256QAM0.5003838.983
31645000000256QAM0.8003938.605
32651000000256QAM1.0004038.983
OFDM Downstream Overview
ReceiverFFT typeSubcarr 0 Frequency(MHz)PLC lockedNCP lockedMDC1 lockedPLC power(dBmv)
0NANANONONONA
1NANANONONONA
Upstream Overview
Port IDFrequency (MHz)ModulationSignal strength (dBmV)Channel IDBandwidth
138596000ATDMA - 64QAM37.50033200000
230596000ATDMA - 64QAM35.50016400000
323700000ATDMA - 64QAM34.25026400000
OFDM/OFDMA Overview
Channel IndexStatelin Digital AttDigital AttBW (sc's*fft)Report PowerReport Power1_6FFT Size
0DISABLED0.50000.00000.0000-inf-1.00004K
1DISABLED0.50000.00000.0000-inf-1.00004K

 

*edit again*

noticed T3 time up accomulate when speeds aspeed to be very slow on the modem before reboots. can post logs however levels are always good.

Re: CODA-4582 - Open Issues for Investigation

gp-se
I'm an Advisor
you're missing channel 26, exchange the modem for the new one with the black dot on the box, and black dot on the modem beside the power cord connector

Re: CODA-4582 - Open Issues for Investigation

prateeck7
I Plan to Stick Around

@RogersDaveSo after a week of 930+mbps I was getting ocnsistently, now I am not even getting past 100mbps speed for the past 3 days. Speed goes to 700mbps at max and then falls below 100mps. Can you, please, check what it going on in my area node? In the meantime I have asked @CommunityHelps to update me to .20.

Re: CODA-4582 - Open Issues for Investigation

Dragus
I Plan to Stick Around

Almost 6 days in with .19 firmware. No more speed degradation issues and 10-20% packetloss.

 

Although my download speed is around 200-600 Mb/s down with 38-44 Mb/s upload during prime hours I can't complain, more than enough for my path of exile gaming 😜

 

But the midnight I did get the.19 firmware, the service technician did replace my previous CODA modem that same day. So really hard to tell if it was the previous CODA modem since people on .19-.20 are still having speed degradation issues.

 

Edit: forgot to mention I've always been running bridge mode on an Asus RT-AC3100 wired.

 

 

Re: CODA-4582 - Open Issues for Investigation

arrago
I Plan to Stick Around

so I went in to swap my modem with the "black dot" version. I now have channel 26. I had one of the orginal batches. it has firmware version .13 on it not sure if i'll get newer any time soon.

 

Software Version

2.0.10.13

new levels

 

DHCP Lease Time😧 06 H: 21 M: 55 S: 39
Downstream Overview
Port IDFrequency (MHz)ModulationSignal strength (dBmV)Channel IDSignal noise ratio (dB)
1591000000256QAM0.8003138.983
2363000000256QAM1.9001038.983
3369000000256QAM1.6001140.366
4375000000256QAM1.8001238.983
5381000000256QAM1.9001340.366
6387000000256QAM2.5001440.946
7393000000256QAM2.6001540.366
8399000000256QAM2.4001640.366
9405000000256QAM2.0001740.366
10411000000256QAM1.9001840.366
11417000000256QAM2.2001938.983
12423000000256QAM2.5002038.605
13429000000256QAM2.8002138.983
14435000000256QAM3.1002240.366
15441000000256QAM3.3002340.366
16447000000256QAM3.3002440.366
17555000000256QAM0.0002538.605
18561000000256QAM-0.6002638.605
19567000000256QAM-0.5002738.605
20573000000256QAM-0.5002838.983
21579000000256QAM-1.9002937.636
22585000000256QAM-1.3003038.983
23357000000256QAM2.400938.983
24597000000256QAM1.5003238.605
25657000000256QAM1.3004138.983
26663000000256QAM1.4004238.983
27669000000256QAM1.9004340.366
28675000000256QAM2.1004440.366
29633000000256QAM1.0003740.366
30639000000256QAM1.0003840.366
31645000000256QAM1.3003938.983
32651000000256QAM1.5004040.946
OFDM Downstream Overview
ReceiverFFT typeSubcarr 0 Frequency(MHz)PLC lockedNCP lockedMDC1 lockedPLC power(dBmv)
0NANANONONONA
1NANANONONONA
Upstream Overview
Port IDFrequency (MHz)ModulationSignal strength (dBmV)Channel IDBandwidth
123700000ATDMA - 64QAM35.00026400000
238596000ATDMA - 64QAM38.50033200000
330596000ATDMA - 64QAM35.00016400000
OFDM/OFDMA Overview
Channel IndexStatelin Digital AttDigital AttBW (sc's*fft)Report PowerReport Power1_6FFT Size
0DISABLED0.50000.00000.0000-inf-1.00004K
1DISABLED0.50000.00000.0000-inf-1.00004K

Re: CODA-4582 - Open Issues for Investigation

Breadwinka
I Plan to Stick Around
Looks like im missing a few channels. DOCSIS WAN

This menu displays both upstream and downstream signal parameters

 
Downstream Overview
Port IDFrequency (MHz)ModulationSignal strength (dBmV)Channel IDSignal noise ratio (dB)
1591000000256QAM3.7003138.605
2657000000256QAM4.7004136.387
3663000000256QAM5.2004236.387
4669000000256QAM5.5004336.387
5381000000256QAM1.8001338.983
6387000000256QAM2.2001440.366
7393000000256QAM2.6001540.366
8399000000256QAM3.0001640.366
9405000000256QAM3.1001740.366
10411000000256QAM2.9001840.366
11417000000256QAM2.9001938.983
12423000000256QAM3.0002038.983
13429000000256QAM3.1002138.983
14435000000256QAM3.2002240.366
15441000000256QAM3.1002340.366
16447000000256QAM3.3002440.946
23675000000256QAM6.1004436.387
27615000000256QAM4.0003537.356
28621000000256QAM6.4003638.983
29633000000256QAM5.0003738.605
30639000000256QAM5.7003838.605
31645000000256QAM5.5003937.636
32651000000256QAM4.4004037.636
OFDM Downstream Overview
ReceiverFFT typeSubcarr 0 Frequency(MHz)PLC lockedNCP lockedMDC1 lockedPLC power(dBmv)
0NANANONONONA
1NANANONONONA
Upstream Overview
Port IDFrequency (MHz)ModulationSignal strength (dBmV)Channel IDBandwidth
138595687ATDMA - 64QAM41.50033200000
230596000ATDMA - 64QAM38.00016400000
323700000ATDMA - 64QAM36.50026400000
OFDM/OFDMA Overview
Channel IndexStatelin Digital AttDigital AttBW (sc's*fft)Report PowerReport Power1_6FFT Size
0DISABLED0.50000.00000.0000-inf-1.00004K
1DISABLED0.50000.00000.0000-inf-1.00004K

Re: CODA-4582 - Open Issues for Investigation

Yup, time to swap the modem for a "black dot" version modem.   That black dot will be present on the outside of the packing box and near the power cord on the modem. 



Re: CODA-4582 - Open Issues for Investigation

John86
I've Been Here Awhile

You can contact me re the below speed degradation issue noted in your post:

 

 

"2.4 GHz WiFi Degrades speed

There has been reports in the last few days that disabling 2.4 GHz WiFi can make a difference on the wired speeds observed (by 200-300 Mbps). I suspect that this occurs on modems that are impacted by interference (which we are working on a replacement program in the next 2-3 weeks) but want to be sure that there isn’t another underlying issue.

 

If you observe this behavior and are available to run some tests, let me know. I will be looking for a case where cable signal is within specification and there are no sign of interference on your modem."