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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

crazyshot
I plan to stick around

I will check it out, thanks a lot!

Re: CODA-4582 - Open Issues for Investigation

NBomb
I plan to stick around

The twitter support people instructed me to trade in my modem, and a tech is also coming tomorrow to look at the TV issue.

 

Black dot modem seems to have cured my internet issue (I don't understand how, but ok!) so I'm happy!

 

...for now. 🙂

Re: CODA-4582 - Open Issues for Investigation

Hybrid_Noodle
I plan to stick around
@Datalink Interesting thought about the VPN however I use a hardware based CVO for work which is connected 24/7 and I have not seen any speed degradation issues or poor modem performance.

For testing sake next week I will use a software based VPN to connect into work and see if there are any modem/speed/performance issues.

Re: CODA-4582 - Open Issues for Investigation

crazyshot
I plan to stick around

May I ask what is black dot modem?

Re: CODA-4582 - Open Issues for Investigation

Datalink
Resident Expert
Resident Expert

That modem model has additional shielding over the Docsis Cable Tuner to protect it from EMI generated by the wifi transmitter.  That would also work with EMI from other sources as well.  There is a black circular sticker "black dot" pasted close to the power cable on the modem, and on the packing box. 

Re: CODA-4582 - Open Issues for Investigation

@Hybrid_Noodle please let me know what you find.  I'll be very interested in your results, especially if you see any slow data rates from the modem which are only cured by a modem reboot.

Re: CODA-4582 - Open Issues for Investigation

Jeffj
I plan to stick around

So far my internet has been fine today, I have been refraining from using my VPN. I dont know anymore lol this is weird. 

Re: CODA-4582 - Open Issues for Investigation

Datalink
Resident Expert
Resident Expert

With a CGNM-3552 it only took about 2 hours to crash the modem.  There have been complaints with the Arris SB6190 of a similar "slow modem" problem earlier last year, but, I don't know if they put enough efforts into resolving it.  Fwiw, Intel and Arris are working on the UDP issues for the Puma 6 modem at the present time.  I was hoping they would be much further along. 

Re: CODA-4582 - Open Issues for Investigation

Hybrid_Noodle
I plan to stick around
@Jeffj and @Datalink you can be as vague as you need to be but what type of VPN's were you using and where were they connecting into. Just for curiosity sake to try and see if there are any correlations.

For myself its a Cisco 881 Router connecting into Boxborough, MA. Behind it is a IP Phone and laptop both of which do not see any impact over time.

Re: CODA-4582 - Open Issues for Investigation

Jeffj
I plan to stick around

@Hybrid_Noodle wrote:
@Jeffj and @Datalink you can be as vague as you need to be but what type of VPN's were you using and where were they connecting into. Just for curiosity sake to try and see if there are any correlations.

For myself its a Cisco 881 Router connecting into Boxborough, MA. Behind it is a IP Phone and laptop both of which do not see any impact over time.

I use openvpn to connct to some of my work servers to do work things. As well as ssh tunnels and sessions. 

 

Today though i have been refraining from vpning back to home and my net  appears fine. But i work late tonight so we will see. Typically every day this week i have had to reset it in them orning ot get it working in the AM and then when i arrive home from work its not working properly again. 

Re: CODA-4582 - Open Issues for Investigation

Jeffj
I plan to stick around

I can  safely say its not the VPN.

 

I havnt used it all day and my connection is bombed out again, ping plotter as of about 10 min ago has started showing dropped packets and ive lost a channel again. 

Re: CODA-4582 - Open Issues for Investigation

gp-se
I'm an advisor

@Jeffj wrote:

I can  safely say its not the VPN.

 

I havnt used it all day and my connection is bombed out again, ping plotter as of about 10 min ago has started showing dropped packets and ive lost a channel again. 


After a reboot when you have all channels what are the signal levels? When the speed drops and you loose channels do the signal levels change? I recall reading people were saying signal levels change after a few hours once they got beta firmware .23, and a reboot would fix it. 

Re: CODA-4582 - Open Issues for Investigation

RyzenFX
I'm a reliable contributor

Has anybody gotten this error while their modem is being updated to .19? 

 

502/04/2017 05:07:2969010900errorDisruption during SW download - Power Failure

Re: CODA-4582 - Open Issues for Investigation

timfolkins
I plan to stick around

I noticed tonight (along with the typical slowdowns and escalating signal levels) that at one point I was missing channels 8 and 24. Rebooted again, just missing 24.

 

That can't be normal, right?

Re: CODA-4582 - Open Issues for Investigation

timfolkins
I plan to stick around

I know you didn't ask me specifically but on reboot my signal strengths are +-2 max... many < +_1

 

once speed degrades I see some channels in +10 but it's a mix bag. Night and day numbers from a fresh reboot.

Re: CODA-4582 - Open Issues for Investigation

SKC19
I've been around

I am on 250/20 plan

CODA-4582 firmware 2.0.10.13 was updated to 2.0.10.19

After update did a speedtest for 2.4GHz and 5Ghz wireless

The 2.4Ghz speed is drastically low compared to 5Ghz

Wireless              Download                 Upload             Latency

5GHz                131.48 Mb/s           21.87 Mb/s            11 ms

2.4GHz               11.66 Mb/s            3.98 Mb/s             13 ms

 

Will you be pushing next firmware out to participants in the firmware trial program as soon as it passes initial testing

Re: CODA-4582 - Open Issues for Investigation


@timfolkins wrote:

I noticed tonight (along with the typical slowdowns and escalating signal levels) that at one point I was missing channels 8 and 24. Rebooted again, just missing 24.

 

That can't be normal, right?


Are you on an area with D3.1?

 

Do you have a 'black dot' 4582?

Re: CODA-4582 - Open Issues for Investigation

Jeffj
I plan to stick around

My signal levels Alwats start off around 0 +/- 1 and slowly start creeping to -4 to -6

 

And i lose channel 13. Once channel 13 is gone the Internet service halts pretty much. Its not usable at all. 

A reboot always fixes it for atleast 6 hours.

Re: CODA-4582 - Open Issues for Investigation

PacoDBX
I've been here awhile

I recently upgraded to a Hitron Coda 4582, and with this upgrade my Linksys 5 port workgroup 10/100 switch no longer works. The WIFI works and the ethernet ports on the Hitron itself work fine. The Linksys switch had no problem wIth the prior Hitron modem/router. Your online and call centre support team could not help after many hours with them. Any suggestions? 

Re: CODA-4582 - Open Issues for Investigation

timfolkins
I plan to stick around

Hi @VivienM - I am not on a D3.1 area and I do have the black dot.

 

.23 firmware

Re: CODA-4582 - Open Issues for Investigation


@PacoDBX wrote:

I recently upgraded to a Hitron Coda 4582, and with this upgrade my Linksys 5 port workgroup 10/100 switch no longer works. The WIFI works and the ethernet ports on the Hitron itself work fine. The Linksys switch had no problem wIth the prior Hitron modem/router. Your online and call centre support team could not help after many hours with them. Any suggestions? 


Which firmware version are you on?

 

I know some of the earlier firmware versions had problems with Ethernet autonegotiation. If you're not on .19 or .20 (I forget which one is the normal one for non-trial participants), wait 24-48 hours to get upgraded, and then see whether your switch works...