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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

reefermajic69
I plan to stick around

Thanks so much I will give it a shot.

 

If the ASUS 2400 is no good then can you suggest one that is good with AC?

Re: CODA-4582 - Open Issues for Investigation

14N
I plan to stick around

@RogersDave wrote:

 

 

 

Issues getting an IP in bridge mode

We have been able to reproduce this on D-Link routers. It is an bug in the D-Link firmware (DD-WRT doesn’t have the bug) but we are looking at ways to mitigate it from the modem side.

 

If this issue occurs routers other than D-Link, let me know as I’ll need to investigate further.

 

 


Please check also TP-Link router, all users with TP-Link C2600 have this issue. If it is due to router's firmware then why is there is no issue with the previous modem in bridge mode and no issue with CODA if not in bridge mode? It's like there is a conflict when CODA is set to bridge mode.

 

also does the internet speed only half the speed if router is flashed with OpenWRT?

 

Thanks 

Re: CODA-4582 - Open Issues for Investigation

Jeffj
I plan to stick around

@Datalink wrote:

The LAN .... SWITCH CONTROL .... NAT Acceleration must be on for Asus routers if you want to run anything over 100 Mb/s.  Now, the one thing that you have to keep in mind is that there are functions that will kick off the NAT Acceleration, such as Traffic Monitoring, Port Forwarding and others.  The suggestion to reset the router back to default settings as indicated by @Makaveli99 is spot on as that will kill any functions that disable the NAT Acceleration.

 

When that is done, run a speed test using the www.speedtest.net Toronto Rogers server, or Montreal Rogers Server.  If and when that is complete, go thru the entire menu list on the left hand side, look at every sub-menu item and ask yourself if you're using it or not.  If not, disable it.  If you decide to enable something, follow that with an immediate speedtest so that you know whether or not you're crippling the throughput by enabling that function.  

 

Just to note, the RT-AC87U has been nothing but trouble for a good number of its users.  If you have avoided all of its problems, consider yourself very lucky.  If you're having issues with it, as many others have had, strongly consider getting rid of it and moving on to something else with better stability.  

 

As for the speedtests, and I say this to everyone, you need to do some research to determine what the speedtest is doing:

 

1.  single thread or multi-thread; and

2.  what protocol is used; and

3.  what browswer is best suited for that particular site; and

4.  whether or not its so far away that any results you see are questionable at best.  

 

Add to that discussion any device that you might decide to use to test the top speed of the gigabit service.  Can the device actually support gigabit rates?

 

That all sounds rather harsh, but, we've had many people come into the forum in the past complaining about data rates and when we look very closely at routers, cabling, end devices, etc, we find that they are old, not configured properly or that they won't support gigabit rates.   So, moving users up above 100 Mb/s was the first challenge, the challenge now is to get them to gigabit rates, while at the same time dealing with new modem issues.  

 

So, best advice, bite the bullet and reset the modem.  Watch the NAT Acceleration very closely to ensure that it doesn't get kicked off.  Run the speedtests at www.speedtest.net Toronto Rogers, Toronto Beanfield, or Montreal Rogers or Fibrenoire if you're closer to Montreal than Toronto.  Those servers have enough horsepower to test the last mile to the modem and drive higher data rates. 


One main issue I find with testmyspeed and speedofme when i do a net stat is they only do a single socket for the connection test. which hardly can saturate a connection and i think that combined with HTML5 testing which is very hardware and browser dependant, offers lower results.   Speedtest.net and any affilliated servers really are not evil like some try to suggest, they do a good job taking advantage of the bandwidth and it shows.  

I can take these HTML5 speed test sites line them up and test them and get fruty loops results from all of them across all browsers all drastically different.  Sad thing is I have the hardware to kill a connection, Intel Quad port server adapter with its own Proc and ram, i7 4770k, and well more ram then people need. 

 

I still insist the speed tests I trust are DSL reports and Digital Oceans Speetest.net servers and both of them always show me comparable results. 

Re: CODA-4582 - Open Issues for Investigation

@reefermajic69, the first thing to do is to force a restart on the modem.  Pull the power from it, wait 30 seconds and plug it back in.  After it boots up, log into it and kick it into Bridge mode.  Leave the pc connected and reboot the pc as well.  When the reboot into Bridge mode is complete, run a test at ipv6-test.com.   That should show 4/20 as a final score as IPV6 is currently turned off on the modem.  Then run a speedtest at www.speedtest.net Toronto Rogers or Beanfield or Montreal Rogers or Fibrenoire.  Remember that the pc is relying on its own firewall for protection, so keep this time as short as possible.  When that is done, take note of the speedtest results.  I'll be interested in what you find.  

 

Then run a Factory Reset on the router.  That might hurt as you will have to reset the various parameters and pay very close attention to the LAN .... SWITCH CONTROL .... NAT Acceleration setting to ensure that it remains enabled.  When the Factory Reset is complete, remove the power from it, connect it to the modem, and then power it back up.  It should acquire an IP address from the modem and you should be able to connect to the router to set some minimal parameters for now.  Disable items that you will not be using, but, at this point, don't enable anything perhaps beyond the AI Protection and the wifi.  At this point you should run a speedtest to see what the results are.  Depending on your CMTS and the loading on that CMTS, you may not see 900+ Mb/s at this time of the night.   It wouldn't surprise me.  You should however see the same data rate that you saw with a direct connection to the modem.  Thats what you want to prove at this point.  When you are done those tests, then I would go back into the modem and set the various parameters, once again, keeping an eye on the NAT Acceleration setting.  

 

For the router, consider this.  If you haven't really pushed the router with high data rates to this point, you may not have come across the same issues that others have.  Lets see if you can get the router up to speed and go from there.  I'm not keen on telling people to spend money, but, in the case of gigabit rates, end users are going to have to consider moving up from the usual consumer routers to something that can handle the higher data rates and provide the protection that they are looking for.  That might mean moving to something like a Pfsense or Opensense router with an additional wifi only router such as the RT-87U as an access point.  It depends on the stability of your 87U.  Running gigabit rates is not going to be cheap.  I have no hesitation in recommending other Asus routers, but my concern is whether or not they will actually handle the higher speeds.  I don' t think there is a consumer router on the market these days that can adequately handle gigabit rates. There is a router that Asus is working on, the BRT-AC828.  That is aimed at the business crowd apparently and hasen't been released yet from what I understand.  In terms of it handling gigabit rates, I'll believe it when I see more reviews and test results.  Thats going to be an expensive router.  So, first things first, get the modem and router running at the data rates they should be at. 

Re: CODA-4582 - Open Issues for Investigation

reefermajic69
I plan to stick around
The LAN Switch Control -> Nat has only Auto and Disable

Re: CODA-4582 - Open Issues for Investigation

It should be on Auto and stay on Auto for the entire time that you are changing any other setting.  Note that there was a new firmware version released in Dec so it would be worth running a check for that.  On my RT-AC68U, with the new firmware, there is a note beside it that showed that both Cut Through Forwarding and Flow Acceleration were enabled initially after the firmware update.  The Flow Acceleration portion of that note is new for the 68U. The fact that I run the AiProtection results in the Flow Acceleration being disabled.  But, thats ok.  I know that the 68U is underpowered for gigabit service although I can see speedtest results up to 950 Mb/s as everything else except for the wifi is disabled.  So, that is something to keep in mind when you look at the NAT Acceleration.  

Re: CODA-4582 - Open Issues for Investigation

reefermajic69
I plan to stick around

Ok So I did all you ask and again same situation.

 

High with a direct connect but via the ASUS2400 it drops significantly 😞

 

IPV6.jpg

Speedtest.jpgAsus Nat.jpgWAnNAt.jpgAsusSpeedTest.jpg

Re: CODA-4582 - Open Issues for Investigation

One of the mods will have to approve the images so that they're publicly available, so, can't see them yet.  The NAT Acceleration is still on Auto?

Re: CODA-4582 - Open Issues for Investigation

reefermajic69
I plan to stick around
yes

Re: CODA-4582 - Open Issues for Investigation

I'm guessing that the other images might contain your IP address, therefore the moderator didn't approve them. What are you seeing for speeds from the modem, and then thru the router?  I'm assuming that they are run with ethernet connections in both cases. 

Re: CODA-4582 - Open Issues for Investigation

reefermajic69
I plan to stick around

yes cat 6

 

direct was 794/20

after testing with Asus factory reset Nat Auto 279/13

Re: CODA-4582 - Open Issues for Investigation

Jeffj
I plan to stick around

@14N wrote:

@RogersDave wrote:

 

 

 

Issues getting an IP in bridge mode

We have been able to reproduce this on D-Link routers. It is an bug in the D-Link firmware (DD-WRT doesn’t have the bug) but we are looking at ways to mitigate it from the modem side.

 

If this issue occurs routers other than D-Link, let me know as I’ll need to investigate further.

 

 


Please check also TP-Link router, all users with TP-Link C2600 have this issue. If it is due to router's firmware then why is there is no issue with the previous modem in bridge mode and no issue with CODA if not in bridge mode? It's like there is a conflict when CODA is set to bridge mode.

 

also does the internet speed only half the speed if router is flashed with OpenWRT?

 

Thanks 


As for the DHCP issue from the modem, this could indeed be a firmware issue, on either side. But the "the internet speed only half the speed if router is flashed with OpenWRT" is because Openwrt and DD-WRT do not support Hardware NAt in any way at all, and because of this your router is crippledwhen it comes to WAN-LAN transactions and even LAN-LAN transactions, hence the speed decrease. 

Re: CODA-4582 - Open Issues for Investigation

reefermajic69
I plan to stick around

ok so what router can i get that will work with the CODA rogers to allow me to get consistent speeds from what i get directly with the Rogers CODA?

Re: CODA-4582 - Open Issues for Investigation

prateeck7
I plan to stick around

@RogersDaveI fail miserably at bufferbloat. I feel that is the reason I am doing bad at testmynet and speedof.me and when downloading files.

 

http://www.dslreports.com/speedtest/8450900

Re: CODA-4582 - Open Issues for Investigation

Jeffj
I plan to stick around

Wooo Iv've never seen BB that high before.  are you behind a third party router or using the modem its self? 

Am i reading that right in the thousands? I thought DSL Reports just gave up after about 600ms BB

Re: CODA-4582 - Open Issues for Investigation

I'm surprised that the speed thru the router is that low, especially given the download results out of the modem.  The modem is running in Bridge mode correct.  Stupid question, just want to be sure.  

 

I'm going to have to think about that 87U and see what I can find.  It should be able to keep up with the modem, but I'll have to do some searching.  

 

As far as a router, that depends on what you are looking for, a stand alone firewall/router plus wifi access point, or a consumer class router similar in nature to the 87U.  I would recommend anyone to think about a Pfsense router, but, not go low end.  There is definitely a learning curve there.  You can build our own pc and install Pfsense or even Opensense.  For a consumer class router, restrict your search to Asus routers that have 1.7 Ghz processors, then consider routers with 1.4 Ghz processors.  The AiProtection kills IPV6 datarates due to the packet scanning, so, processor speed is important.  There are trade-offs in deciding which way to go.  A Pfsense/Opensense firewall/router built on the right cpu will offer security and years of service.  The consumer class adds wifi all in one box but, the CPU probably won't keep up to the data rates and offer the protection you might be looking for.  So, there is some food for thought to consider.  I haven't been router shopping recently so I'll have to see whats up in the Asus router line. 

Re: CODA-4582 - Open Issues for Investigation

reefermajic69
I plan to stick around
Yes please get back with a suggestion

Re: CODA-4582 - Open Issues for Investigation

prateeck7
I plan to stick around
I am using Rogers CODA modem itself.

Sadly, this 'F' is the norm for me for the past month. Sometimes, I do manage to get D. But, mostly, it's 'F'. Actually, many times I manage to pass 10,000ms. Yes, you read that right.

Re: CODA-4582 - Open Issues for Investigation

RogersDave
Retired Support
Retired Support

@Hybrid_Noodle wrote:

@RogersDave There may be an issue with the Rogers Home Monitoring router (Netgear WNR2000v5) getting an IP address while the CODA is in bridge mode as after the .19 firmware push it appears as though the router has lost connectivity to the outside world.

@Hybrid_Noodle, Thanks I will have this tested.

 


@gp-se wrote:
In terms of the exchange program for users with the interference issue, how will those users know they are affected?
Is there a certain batch of serial numbers that are known to have the issue? I ask because I'm curious if my modem is affected and would need to be exchanged once the program launches.

@gp-se, I am not sure of what the communication channel will be all the way to the end-user but I will provide a list of affected modems to our product management team. They then could e-mail, call or send letters to affected users. The newer modems will have a distinctive mark on them as well so they will be easy to flag in store, at the warehouse and for end-users.

 


@Wizerobe wrote:

I had the 250Mbps package hooked up yesterday (wednesday Jan 4th) and even up until this morning I had an average speedtest of 330Mbps, though as of tonight, I've been stuck at 5-10Mbps Down.


@Wizerobe, Can you send me a private message with you MAC address so I can have a look? Did you reboot your modem at least once after the upgrade to 2.0.10.19?

 


@14N wrote:

@RogersDave wrote:

 Issues getting an IP in bridge mode

 


Please check also TP-Link router, all users with TP-Link C2600 have this issue.


@14N, Noted.

 


@prateeck7 wrote:

@RogersDaveI fail miserably at bufferbloat. I feel that is the reason I am doing bad at testmynet and speedof.me and when downloading files.

 

http://www.dslreports.com/speedtest/8450900


@prateeck7, I know this has been an issue for you for a while and I will be looking at your modem today. I needed additional tools which I was able to build only yesterday to investigate your case further.

 

Dave

Re: CODA-4582 - Open Issues for Investigation

amd7674
I plan to stick around

Great thread 🙂 

 

I'm currently using CODA x.19 with Asus AC-1900P in a bridge mode.  The 1.4ghz dual core router handles 1GB speeds well.  I also use AIProtection for my home network, time schedule to control my kids PCs/Ipads.  

 

As for fw I had a false with my VOIP yesterday (OBI110 - freephoneline.ca/google voice) where I couldn't hear people talking but they could hear me.   As suggested on DSLReports, powering down the device fixed the issue.   At least it works today.  

 

Overall the modem has been better than replaced 3552.   It is not perfect, without running diagnostics I can feel sometimes when browsing.   It could be related to peak hours/congestions.  I haven't online game lately, BF1 is waiting for me, but no time.  LOL.   I'm sure most of current major issues will be fixed in the future fw versions.    Also I cannot wait for 3.1 support in my area (Nepean - Fallowfield POI).

 

I just want to say THANK YOU to RogersDave and Datalink (on various forums) trying to help us :-).  

Re: CODA-4582 - Open Issues for Investigation

Coccino
I plan to stick around

Awesome! I'll be following this thread now as well. I have made some changes to my residence's network infrastructure and will be using the CODA in bridge mode. I will see how that goes in terms of usability and the speeds I am getting.

 

Thanks for all the insight guys