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CODA-4582 - Open Issues for Investigation

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 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).




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 but more likely in 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



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



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



List of connected device does not get fully populated

This is a known issue that has been tracked since firmware 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 (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



Missing SC-QAM Channels

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


Investigation continues with Hitron.



WiFi Survey

The WiFi Survey functionality in firmware (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


Update April 22: This issue has been resolved in firmware

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





*Edited Labels*

2,620 REPLIES 2,620

Re: CODA-4582 - Open Issues for Investigation

I'm an Advisor

@RV78 wrote:

I've switched my modem 3 times already, spoken to technical support varies times. Even have an interaction number after I've escalated the issue, which I receive a call about every week. Technical Support and even the Hitron Engineer still cannot pin point the root cause. Hopefully you guys can give me some ideas, since this issues is almost at 3 months long.


Has anyone faced issues with not connecting to ipv4 sites (ipv6 sites work perfectly fine) on devices wired or wirelessly connected to the Hitron CODA-4582 Router (FW: 33T3)?


We've tried the following...

  1. Technician onsite to check signal
  2. Changed Router 3 times (issue first raised with AC Router) 
  3. Factory Reset several hundred times
  4. Upgraded Firmware to newer version and older version
  5. Disabled IPV6
  6. Re-allocated connected devices between 2.4 vs. 5
  7. Removed all wireless devices and test with wired devices (and vice versa)
  8. Tested with only 1 wired or wireless device

I've ran an test and its unable to connect to ipv4 "unsupported" on one device but successful on another device.  For any device that fails it states that the DNS6 + IP4 is unreachable.


Hope you guys have an insight to resolve this issue.


What device are you using that is giving you this issue? When the technician comes, does his laptop have the same error? 

The fact that two completely different models of modems, with various different firmwares show this issue leads me to believe it's not a modem issue.


If you are getting this issue with just one computer, I'm inclined to believe the issue is in your computer. However is multiple devices, including the technicians laptop show this issue, then I think it's a CMTS configuration issue in your area. You would need to ask @RogersDave to have a look at the CMTS configuration.


Re: CODA-4582 - Open Issues for Investigation

@Sticks84 wrote:
Everything was working fine with 28T2 firmware, never lost connection. Losing connection now at least once a day on 33T3.


You could perform a factory reset on your modem to go back to production firmware 28T2 if the connection drops are causing your trouble. Keep in mind you will need to set everything back up from scratch (WiFi, Passwords, etc.)


To perform a factory reset: use a pen tip or similar to press and hold the reset button on the back of the modem for 15 seconds then release. The modem will reboot and you'll have to set everything back up from scratch.


Re: CODA-4582 - Open Issues for Investigation

I've Been Here Awhile

Multiple devices are having the same issue, below are the list of devices...


  • Android Phones (S8 & Pixel 2 XL)
  • iPhone (6S Plus, 7, 7 Plus)
  • Chromecast
  • Chromecast Audio
  • Home mini
  • Samsumg TV
  • PS4
  • Nest Thermostat
  • PC Laptop
  • Macbook

*not all devices are connected at the same time


These devices fully connect the modem and during use the ipv4 connection drops, may come back automatically or after a modem reboot. (devices are less than 5 years)


Technician never used their own Laptop to conduct any tests.


@RogersDave how would I look at the CMTS configuration to confirm if its correct? Shouldn't a factory reset default this configuration?

Re: CODA-4582 - Open Issues for Investigation

I'm an Advisor

@RV78 wrote:



Technician never used their own Laptop to conduct any tests.


@RogersDave how would I look at the CMTS configuration to confirm if its correct? Shouldn't a factory reset default this configuration?


You cannot view the CMTS configuration, only a Rogers network engineer has access to that.

I'm leaning towards that, because you've had multiple modems and multiple devices with this issue.



Re: CODA-4582 - Open Issues for Investigation

I've Been Here Awhile

CODA-4582 Not working with Netgear Orbi


So I've done a lot of research, and reading this forum...I have noticed that D-Link routers have had issues with CODA-4582 as far as Internet connections.


Let me say this first....I have been running this Gateway in Bridge Mode for months with my Asus router...No issues....


Today, I decided to try out the Netgear Orbi AC3000.  The reason for the purchase, is I wanted better 5 Ghz coverage over all floors of my home, and to give mesh-WiFi a shot.


Long story short, I could not get the CODA 4582 to send Internet to my Orbi router.  I tried to reset the Gateway numerous times, as well as the Netgear, and same result.  I even put the CODA 4582 into Gateway mode, and then into Bridge mode again...Same result.


Finally, I plugged my Asus router back in, INTERNET NO PROBLEM!!!!!


Can anyone shed some light on what the issue could be?


Thanks in advance!!