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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


@Hybrid_Noodle wrote:

@RogersDave I completed the buffer bloat test. (On 1G/50 Plan). I ran the test 3 times when hardcoding the 'Down megabit/sec" to 1000. Ran this test 3 times with the following results

 

Test 1 (930/31) - http://www.dslreports.com/speedtest/8752386

Test 2 (838/25) - http://www.dslreports.com/speedtest/8752648

Test 3 (877/22) - http://www.dslreports.com/speedtest/8752724

 

I ran the test one final time with the default settings with the following result

Test 1 (817/23) - http://www.dslreports.com/speedtest/8752878


This is in line with what I am seeing on my modem on a 1G plan (where the speedboost feature is disabled). Most of my tests were always resulting in a score of B or C for bufferbloat while lower tiers were often seeing results of F.

Re: CODA-4582 - Open Issues for Investigation

Jeffj
I Plan to Stick Around

@RogersDave 

YOur suggestion to fix the downlaod speed helps the download BufferBloat it seems a fair bit. But the upload is still pretty high.  Instead of an F i get a C now. at 250Mbps down 

At 100 Mbps down i can get B bufferbloat, THe downstream is always GReat, upstream still pegs the buffr bloat graph on occasion. 

Re: CODA-4582 - Open Issues for Investigation

RyzenFX
I'm a Reliable Contributor

I don't really think that disabling speedboost would be advantageous in anyway despite it showing better results in DSL Reports' speed test.

Re: CODA-4582 - Open Issues for Investigation

14N
I Plan to Stick Around

@RogersDave wrote:

@Coccino wrote:

So I bought a TP-Link Archer C2600 but have not set it up. Is the issue on the C2600 as a whole or is it selected? I have yet to find time to actually install it on my end so I may just wait it out for the *.21 firmware


I believe the issue affects the stock firmware of the TP-Link C2600. Running DD-WRT or OpenWRT would likely work.

 

Dave


What's with CODA (bridge mode) that prevents the router in getting an IP address? It works fine with the previous Gigabit modem and when CODA is not in bridge mode. Isn't it if running the router in DD-WRT or OpenWRT will cut the speed in half?

Re: CODA-4582 - Open Issues for Investigation

LSTA
I Plan to Stick Around

@RogersDave wrote:

@LSTA@mikeepolmic@Dragus@traghipp@hood

 

All of you reported experiencing speed degradation over time (somewhere between 30 minutes to 12 hours). One question asked by Hitron is if this degradation occurs only using a Wired connection or if it occurs on both WiFi and Wired?

 

Also, did any of you run firmware version 2.0.10.13 or 2.0.10.14 for a couple of days without experiencing this issue (was it introduced by 2.0.10.19)?

 

Thanks

 

Dave


I thought I'd replied earlier today, but maybe I hit Cancel instead of Post.

 

Rogers & Hitron technicians stopped by this morning to investigate how in about 10 to 24 hours, roughly once a day, my bandwidth on a wired connection will drop from 940-960mbps to under 10, sometimes 0.2-0.8mbps. It immediately resolves itself on a reboot.

 

I left a PC running plugged in to the router with TeamViewer on it, so when it next happens, a Hitron technician can run a series of troubleshooting commands to explore what might be wrong.

 

Strangely, I'm now looking forward to the next time service degrades that much, since I'll be able to help fix it. 🙂

 

 

Louis.

Re: CODA-4582 - Open Issues for Investigation

LSTA
I Plan to Stick Around

I thought I'd replied earlier today, but maybe I hit Cancel instead of Post. (Edit: I didn't, as I wasn't able to post this, twice now! Here's hoping a third time is the charm...)

 

Rogers & Hitron technicians stopped by this morning to investigate how in about 10 to 24 hours, roughly once a day, my bandwidth on a wired connection will drop from 940-960mbps to under 10, sometimes 0.2-0.8mbps. It immediately resolves itself on a reboot.

 

But as it happens, it last occurred at 10pm the night before, and I'd rebooted the modem then, so it wasn't occuring while they were here. I have a PC running that's plugged in to the router with TeamViewer on it, so when it next happens, a Hitron technician can remotely run a series of troubleshooting commands to explore what might be wrong.

 

Strangely, I'm now looking forward to the next time service degrades that much, since I'll be able to help fix it. 🙂

 

 

Louis.

Re: CODA-4582 - Open Issues for Investigation

mikeepolmic
I Plan to Stick Around

Hi Louis,

 

Mine does the same thing, but every 6 hours - pretty much like clockwork 🙂 ... so I'm going to be looking forward to hearing what you find out ...

 

Good luck!

 

Mike

Re: CODA-4582 - Open Issues for Investigation

Patrick9591
I Plan to Stick Around

@RogersDave

 

Hardware Version 1A
Software Version 2.0.10.19

 

100u plan without bandwidth limiter:

 

http://www.dslreports.com/speedtest/8755858

 

100u plan with bandwidth limited to 85mbps down and 9 mbps upload via ASUS RT-N66U:

 

http://www.dslreports.com/speedtest/8756305

 

Before i was getting lots of fluctuations from Grade F during congested periods and Grade D during the day. Now i am experiencing A's by setting my bandwidth cap between 80-90% via QOS. 

Re: CODA-4582 - Open Issues for Investigation

prateeck7
I Plan to Stick Around

@RogersDaveYep, I am getting 'C" grade in bufferbloat as per your instruction. My best so far. Download was below 80ms and upload was above 1000ms. Not the best but better than before.

 

Now in a simple layman term, what needs to be done here? I don't know if the speedboost is good or bad.

Re: CODA-4582 - Open Issues for Investigation

nothing needs to be done, it's just the way the test calculates buffer bloat. Speedboost is a GOOD thing.

Re: CODA-4582 - Open Issues for Investigation

VivienM
I'm an Advisor

@gp-se wrote:

I don't think your connection is bad, the problem with torrents is depending on seeds/peers its not consistant. I think if speedtest.net shows you as getting good speeds then that is your real speed.


The other thing with torrents is that, depending on your settings, they can be VERY hard on your NAT device.

 

If you are doing a speedtest, that's one TCP session that needs to be NATted.

 

If you are doing torrenting with, say, 200 connections, that's 200 connections (plus there are always some disconnections and some new ones) that the NAT device needs to keep track of.

 

So a NAT router that can easily handle one connection at 800 megabits/sec could easily only have the processor capacity to do 300 megabits/sec of heavy torrenting. If you are using a router that lets you observe its processor activity, that would be an interesting angle to explore...

Re: CODA-4582 - Open Issues for Investigation

Triple_Helix
I Plan to Stick Around

@RogersDave I have been noticing very bad speeds for over the past hour and have never seen speeds like this? It must be the rogers network in North Oshawa near 5 points mall? Smiley Surprised And I did another reboot of the Modem and the same results. 250/20

 

 

 

2017-01-11_20-47-26.png

 

2017-01-11_20-38-46.png

 

Downstream Overview
Port IDFrequency (MHz)ModulationSignal strength (dBmV)Channel IDSignal noise ratio (dB)
1591000000256QAM7.5003140.366
2363000000256QAM4.8001040.946
3369000000256QAM5.3001140.366
4375000000256QAM5.1001240.366
5381000000256QAM4.4001340.366
6387000000256QAM4.9001440.366
7393000000256QAM5.1001540.366
8399000000256QAM5.7001640.946
9405000000256QAM5.9001740.366
10411000000256QAM6.0001840.366
11417000000256QAM6.4001940.366
12423000000256QAM6.7002040.366
13429000000256QAM6.4002140.366
14435000000256QAM6.0002240.366
15441000000256QAM5.8002340.366
16447000000256QAM5.6002440.366
17555000000256QAM8.1002540.366
18561000000256QAM8.6002640.366
19567000000256QAM8.4002740.366
20573000000256QAM8.5002840.366
21579000000256QAM7.9002940.366
22585000000256QAM8.0003040.946
23357000000256QAM4.700940.366
24597000000256QAM7.0003240.366
25603000000256QAM7.5003338.983
26609000000256QAM8.5003440.366
27615000000256QAM9.0003540.366
28621000000256QAM9.1003640.366
29633000000256QAM9.0003740.366
30639000000256QAM8.0003838.605
31645000000256QAM7.2003938.983
32651000000256QAM6.8004038.983
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 - 64QAM43.75033200000
230596000ATDMA - 64QAM41.75016400000
323700000ATDMA - 64QAM40.50026400000
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

gcw23
I'm Here A Lot

Received the .20 firmware this morning before heading to work.  Did a couple speed tests and everything seemed like it was fine.  Tried 4 or 5 servers and was getting around 890/20 which is a lot better than I was getting before around 300/2.  Came home from work and ran a couple more tests, and the speed is terrible again.

 

http://www.speedtest.net/result/5959779331.png

 

speedtest6.jpg


Both were taken at 12:40am.    Currently running in bridge mode, connected to an Asus RT-N66U.  

Re: CODA-4582 - Open Issues for Investigation

damir
Rogers Employee
Rogers Employee

I must say that i do not remember the last time i had this 'slow' download speed.

I had issues with upload recently due to the issues on my node, but that was 'fixed'.

 

Since i got this .20 firmware, i can't say that i am very happy with down speed especially, upload is so so, far from advertised speed 'of course' (sadly), but download .. on Gigabit, 150-250, the most i saw was 700mbit, but not for long.

 

http://www.speedtest.net/result/5961800909.png

 

I can't say .20 is the reason for this, i don't know, but, it started happening since i got it.

Re: CODA-4582 - Open Issues for Investigation

amd7674
I Plan to Stick Around

Your Asus RT-N66U is too slow to handle 1GB speeds.   I had to upgrade my n66u to Asus AC1900P (dula core CPU at 1.4Ghz) in order to handle 1GB speeds.    I'm puzzled how you were getting 890/20...  Perhaps run some tests without N66U in the picture.

 


@gcw23 wrote:

Received the .20 firmware this morning before heading to work.  Did a couple speed tests and everything seemed like it was fine.  Tried 4 or 5 servers and was getting around 890/20 which is a lot better than I was getting before around 300/2.  Came home from work and ran a couple more tests, and the speed is terrible again.

 

http://www.speedtest.net/result/5959779331.png

 

speedtest6.jpg


Both were taken at 12:40am.    Currently running in bridge mode, connected to an Asus RT-N66U.  


 

Re: CODA-4582 - Open Issues for Investigation

timlocke
I Plan to Stick Around

My old Rogers modem failed on 12/1/17 and when I retired to the Rogers store they gave me one of these.  Said it was all they had and would work on my 100Mbps service.

 

Needless to say it had those open issues. I use IPV6 and have a Dlink router.    Took it back and they found  an ACSMR which works perfectly.  Now my 'net is working again I find this thread which would have saved 1/2 a day.

oh Well... I am sure that the majority of people who used the modem in Gateway mode will never notice before the firmware update.

Re: CODA-4582 - Open Issues for Investigation

Vikentieff
I Plan to Stick Around

Just curious, did they give you a white coda-4582 or a new black one?

Re: CODA-4582 - Open Issues for Investigation

robbyf
I Plan to Stick Around

I've never seen a black one before. 

 

Mines white and I have very poor connection.

 

I'm getting 10% of what I should be getting, 20Mbps at best. I'm rated to do 250 but used to pull in over 320 on older eqiupment.

 

I can't really use netflix or gamecenter live unless I reduce the quality to 480 res. which looks awful on 4k.

Re: CODA-4582 - Open Issues for Investigation

Vikentieff
I Plan to Stick Around

@robbyf wrote:

I've never seen a black one before. 

 

Mines white and I have very poor connection.

 

I'm getting 10% of what I should be getting, 20Mbps at best. I'm rated to do 250 but used to pull in over 320 on older eqiupment.

 

I can't really use netflix or gamecenter live unless I reduce the quality to 480 res. which looks awful on 4k.


I was replying to . He says he exchanged the modem today, and I assume they give him a modem from a new shipment, which I've heard are now black.

Re: CODA-4582 - Open Issues for Investigation

timlocke
I Plan to Stick Around

A white one

Re: CODA-4582 - Open Issues for Investigation

is this true there is a new batch of black modems? anyone else heard of this?