Solution Solution to DHCP Issues of Routers (ER605 | ER7206 | ER8411 | ER7212PC) [Closed on May 22nd 2023]
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Update as of May 22nd 2023:
The following official firmware has fixed the DHCP issue mentioned in this thread.
ER605 V1_1.3.0 Official Firmware (Released on May 17th, 2023)
Note: the firmware is applied to ER605 V1 and V1.60.
ER605 V2_2.1.2 Official Firmware (Released on Feb 14th, 2023)
Note: the firmware is applied to ER605 V2 and V2.60.
ER7206 V1_1.3.0 Official Firmware (Released on Mar 28th, 2023)
Note: the firmware is applied to ER7206 V1 and V1.60.
ER8411 V1_1.0.3 Official Firmware (Released on Mar 17th, 2023)
Note: the firmware is applied to ER8411 V1 and V1.60.
ER7212PC V1_1.0.3 Official Firmware (Released on Mar 21st, 2023)
As the official firmware has been released to fix the issue, this thread will be locked to stop updating.
Any further issues or concerns, please feel free to Start a New Thread from HERE.
To get better assistance, you may check Tips For Efficiently Reporting an Issue In The Community.
Update as of Mar 8th 2023:
1. Update the Beta firmware of ER7212PC v1, which fixed all DHCP issues and added some new features.
ER7212PC(UN)_V1_1.0.3 Build 20230228 (Beta)
Beta Release Note:
1) Fixed all DHCP issues based on the official firmware 1.0.2 Build 20230202.
2) Add support for modifying port PVID and optimized stability of the device.
3) Cloud Access is available for the above ER7212PC 1.0.3 Beta.
4) You may need to manually upgrade the upcoming official 1.0.3 firmware once you install the above 1.0.3 Beta.
2. Add note that ER605 v1 and ER7206 v1 have a new Beta firmware for trial, which fixed all DHCP issues and added some new features.
ER7206 V1_1.2.3 Beta Firmware For Trial (Released on Feb 28th, 2023)
ER605 V1_1.2.3 Beta Firmware For Trial (Released on Feb 28th, 2023)
Kind Note:
If you don't need the new features added in the above 1.2.3 Build 20230224 (Beta), it's okay to stay with the earlier Build 20230208 (Beta).
Notes:
(1) Please be sure you have read the Beta Test Agreement before proceeding!
(2) The above Beta has added the fix for the DHCP Reservation issue mentioned HERE.
Update as of Feb 21st 2023:
Add beta firmware for ER8411 v1 and ER7212PC v1 to fix all DHCP issues.
ER8411(UN)_V1_1.0.2 Build 20230214 (Beta)
Beta Release Note:
Fixed all DHCP issues based on the official firmware 1.0.2 Build 20230115.
Notes:
(1) Please be sure you have read the Beta Test Agreement before proceeding!
(2) The above Beta has added the fix for the DHCP Reservation issue mentioned HERE.
Edit on Feb 23rd 2023: add note that Cloud Access is unavailable for the above ER7212PC Beta.
New ER7212PC Beta will be provided soon to add Cloud Access availability. Please wait patiently.
Update as of Feb 14th 2023:
Here are the new solutions to resolve the new DHCP issues we recently received in the community, including
1. DHCP Server failed to assign an IP address when a large number of clients make DHCP requests at the same time.
2. DHCP server failed to assign the correct reserved IP address to some clients.
Beta Firmware Download:
ER605(UN)_v1_1.2.2_Build 20230208 (Beta)
Beta Release Note:
Fixed all DHCP issues based on the official firmware 1.2.1 Build 20220512.
ER7206(UN)_v1_1.2.3_Build 20230208 (Beta)
Beta Release Note:
Fixed all DHCP issues based on the official firmware 1.2.3 Build 20221104.
ER8411(UN)_V1_1.0.2 Build 20230214 (Beta)
Beta Release Note:
Fixed all DHCP issues based on the official firmware 1.0.2 Build 20230115.
Notes:
(1) Please be sure you have read the Beta Test Agreement before proceeding!
(2) The above Beta has added the fix for the DHCP Reservation issue mentioned HERE.
For ER605 V2, please check for the official firmware below to fix the DHCP issue.
ER605 V2_2.1.2 Official Firmware (Released on Feb 14th, 2023)
Note: the firmware is applied to ER605 V2 and V2.60.
As always, thank you for working with our support engineers to address the issue with great cooperation.
And thank you all for your great patience when we're trying to figure out the issue and fix it!
Update as of Jan 30th 2023:
Thank you all for your feedback on this forum to let us know that the DHCP issues are still existed, and more importantly, thanks for our loyal users who worked with our support engineers to figure out the issue with great cooperation.
Here are the updates of the Beta firmware to fix all the DHCP issues that have been located, including
- DHCP Server failed to assign valid IP addresses to some clients. Reported Here.
- Different clients have duplicated IP address on the Omada Controller. Reported Here.
- Offline wireless clients were still shown up in Clients list and reported as connected to the Omada Router. Reported Here.
(Note that ER605 v2 ONLY have the last DHCP issue mentioned above, which is a mis-report by the router.)
Beta Firmware Download:
ER605(UN)_v1_1.2.2_Build 20230118 (Beta)
Beta Release Note:
Fixed the DHCP issues based on the official firmware 1.2.1 Build 20220512.
ER7206(UN)_v1_1.2.3_Build 20230118 (Beta)
Beta Release Note:
Fixed the DHCP issues based on the official firmware 1.2.3 Build 20221104.
Notes:
(1) Please be sure you have read the Beta Test Agreement before proceeding!
(2) The above Beta has added the fix for the DHCP Reservation issue mentioned HERE.
For ER605 V2 and ER8411 V1, please check for the official firmware below to fix the DHCP issue.
ER605 V2_2.1.1 Official Firmware (Released on Jan 30th, 2023)
Note: the firmware is applied to ER605 V2 and V2.60.
ER8411 V1_1.0.2 Official Firmware (Released on Jan 30th, 2023)
Note: the firmware is applied to ER8411 V1 and V1.60
Thank you all for your great patience when we're trying to figure out the issue and fix it!
Any further issues with the above Beta firmware, please feel free to comment below or Start a New Thread from HERE.
Updated on Nov 11th 2022:
The official firmware ER7206_v1_1.2.3 has been released to fix the DHCP issue.
**The above ER7206 1.2.3 firmware is available in the cloud, fully adapted to Omada Controller v5.6.
Updated on Nov 2nd 2022:
Update the Beta firmware to fix all the DHCP issues that have been reported to the support team, including the issue
- DHCP Server failed to assign valid IP addresses to some clients. Reported Here.
- Different clients have duplicated IP address on the Omada Controller. Reported Here.
- Offline wireless clients were still shown up in Clients list and reported as connected to the Omada Router. Reported Here.
ER605(UN)_v1_1.2.2_Build 20221015 (Beta)
ER7206(UN)_v1_1.2.2_Build 20221025 (Beta)
ER605(UN)_v2_2.0.2_Build 20221025 (Beta)
*The above beta firmware is adapted to Omada Controller v5.5, not for Controller v5.6.
Note:
ER605 v2 ONLY have the last DHCP issue mentioned above, which is a mis-report by the router.
Updated on Sep 21st 2022:
Remove the 0918 Beta firmware as some users reported it causes CPU spikes issue.
Updated on Sep 19th 2022:
Update the Beta firmware and add the latest Beta firmware for ER605 v2/ v2.6, which have added the fix that Omada Router may wrongly report the clients status to the Omada Controller, causing the issue that offline clients were still shown up in the Controller Clients list, and connected to the Omada Router (instead of the SSID or network). For more details, check this related post.
ER605(UN)_v1_1.2.2_Build 20220902 (Beta)
ER7206(UN)_v1_1.2.2_Build 20220902 (Beta)
Newer version >> ER605(UN)_v1_1.2.2_Build 20220918 (Beta)
Newer version >> ER7206(UN)_v1_1.2.2_Build 20220918 (Beta)
Newer version >> ER605(UN)_v2_2.0.2_Build 20220918 (Beta)
This Article Applies to:
ER605_v1/ v1.6
with FW 1.2.0 Build 20220114 or FW 1.2.1 Build 20220512
ER7206_v1/ v1.6
with FW 1.2.0 Build 20220117 or FW 1.2.1 Build 20220512
Issue Description/Phenomenon:
Recently we received feedback that the DHCP Server failed with 1.2.0 and 1.2.1 firmware, the issue may manifest as follows:
- DHCP Server won't provide dynamic IP addresses to end clients in some cases.
Related Post: DHCP Server Fails Every Few Hours
(1) simply clicking Save on the Edit Network page will bring the DHCP server to work for a few hours.
(2) reboot doesn't help, the issue doesn't exist with the router firmware 1.1.1.
- Some clients are assigned the same IP address, causing they cannot access the internet.
Related Post: Issues with DHCP, clients get same iP addresses
(1) rebooting the router will solve the issue for a while.
(2) the issue doesn't exist with the router firmware 1.1.1.
Note:
ER605 v2 doesn't have the two DHCP issue described above.
Thank you all @jdpk, @Karel-24, @PascalSBR for reporting the issue with detailed information, and your great cooperation with our support engineers to look into the issue is much appreciated!
After further investigation and tests, the TP-Link team has addressed the problem finally.
Available Solutions:
Update as of Apr 17th 2023:
The following official firmware has fixed the DHCP issue mentioned in this thread.
ER605 V2_2.1.2 Official Firmware (Released on Feb 14th, 2023)
Note: the firmware is applied to ER605 V2 and V2.60.
ER7206 V1_1.3.0 Official Firmware (Released on Mar 28th, 2023)
Note: the firmware is applied to ER7206 V1 and V1.60.
ER8411 V1_1.0.3 Official Firmware (Released on Mar 17th, 2023)
Note: the firmware is applied to ER8411 V1 and V1.60.
ER7212PC V1_1.0.3 Official Firmware (Released on Mar 21st, 2023)
For ER605 V1, you may install the Beta firmware below to fix the issue temporarily.
Beta Firmware Download:
ER605 V1_1.2.3_Build 20230413 Beta Firmware For Trial (Released on Apr 14th, 2023)
Notes:
(1) Please be sure you have read the Beta Test Agreement before proceeding!
(2) The above Beta has added the fix for the DHCP Reservation issue mentioned HERE.
Update as of May 22nd 2023:
The following official firmware has fixed the DHCP issue mentioned in this thread.
ER605 V1_1.3.0 Official Firmware (Released on May 17th, 2023)
Note: the firmware is applied to ER605 V1 and V1.60.
As the official firmware has been released to fix the issue, this thread will be locked to stop updating.
Any further issues or concerns, please feel free to Start a New Thread from HERE.
To get better assistance, you may check Tips For Efficiently Reporting an Issue In The Community.
Thank you all for your great patience when we're trying to figure out the issue and fix it!
Previous Solution Post:
ER605 ER7206 - “Use Fixed IP Address” (DHCP Reservation) Doesn't Take Effect
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I dont see any CPU utilisation issue with the earlier September 2nd beta builds on any of my routers here (i have all 3), but i still see some funkyness with DHCP with both versions. But, since i dont use DHCP - i have servers for that elsewhere on my networks, im sticking with the Sept 2nd build.
However, i am seriously considering reverting to the Late January 1.1.1 beta which added the Stealth port fixes - although it had one noticeable bug (occasional slow web GUI access to the devices) functionally it was 100% stable with what i was using the routers for.
The whole 1.2.0 + line of firmwares for these routers seems troublesome, perhaps TP-Link should revisit the late 1.1.1 code and start adding the known good fixes one at a time again. ?
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Dear @GRL, @MannyF, @Adoril and other community members,
Thank you for your valuable feedback! I've removed the 0918 Beta firmware as you've reported it causes CPU spikes issue.
TP-Link will figure out the CPU spikes issue soon and update the Beta firmware to correct the original issue that Omada Router may wrongly report the clients status to the Omada Controller. For more details about the original issue, check this related post.
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Good decision to remove the 0918 beta.
Hopefully your engineers can resolve it soon, i think everyone is hoping for a more successful 1.2.2 release in the near future
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Thanks, It would seem for the best. I think i will downgrade to 1.1.1 for the time being as I've had a variety of minor issues with all releases 1.2.X. I will keep an eye on any future updates!
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When downgrading, do you need to reconnect wifi devices?
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I'm not 100% sure i understand what you mean by reconnecting wifi devices. When changing the firmware, all devices lost connectivity during the 60ish seconds of downtime then reconnected automaticaly once the router was up and running again.
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@Adoril That is what I would expect, I thought I saw someone say they had to re-pair all their devices when going to the beta firmware.
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@Fae Any news about a fixed beta firmware yet?
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@Fae Yes would be nice to know when this will be fixed, seems to have been awhile now.
Is there any update on this, when an official release will be available? I have about 5 sites on that firmware version, but I am curious to know if there are anymore details of how this issue presents itself. I have not seen this issue on my sites with 1.2.1, but I do not have WiFi at them, only OMADA switches and Router. But maybe users have not reported the issue, I am not sure, but from what I can see in the clients no duplicates and ip's are being assigned.
I am deploying a few new sites, and would like to know best course of action, is 1.2.1 safe if not using WiFi or how does this issue present itself, what config makes this happen? or should I be using 1.1.1? I do not really want to use a Beta version.
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Dear @TelephoneGuy,
TelephoneGuy wrote
Is there any update on this, when an official release will be available? I have about 5 sites on that firmware version, but I am curious to know if there are anymore details of how this issue presents itself. I have not seen this issue on my sites with 1.2.1, but I do not have WiFi at them, only OMADA switches and Router. But maybe users have not reported the issue, I am not sure, but from what I can see in the clients no duplicates and ip's are being assigned.
I am deploying a few new sites, and would like to know best course of action, is 1.2.1 safe if not using WiFi or how does this issue present itself, what config makes this happen? or should I be using 1.1.1? I do not really want to use a Beta version.
Sorry that I haven't been informed of the date for the router firmware release yet, will actively update this post once new firmware is available for Omada router, welcome to subscribe!
Based on all the current feedback, the DHCP issue is more about the compatibility issue between the router's DHCP mechanism and some certain clients's non-standarad DHCP behavior (mainly IoT devices). If your Omada routers are deployed in a home environment, 1.1.1 might be more reliable than the 1.2.1 firmware. If your Omada routers are deployed in a enterprise scenario, 1.2.1 should be safe for use.
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