Business Community > All Threads > Solution to DHCP Issues of Routers (ER605 | ER7206 | ER8411 | ER7212PC) [Closed on May 22nd 2023]
< All Threads

Solution Solution to DHCP Issues of Routers (ER605 | ER7206 | ER8411 | ER7212PC) [Closed on May 22nd 2023]

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
123...

Solution Solution to DHCP Issues of Routers (ER605 | ER7206 | ER8411 | ER7212PC) [Closed on May 22nd 2023]

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
276 Reply
Re: ER605 ER7206 v1 - DHCP Server May Fail With 1.2.0 and 1.2.1 Firmware. [Updated on Sep. 19th 2022]
2022-09-20 13:42:57 - last edited 2022-09-20 13:44:24

  @btx 

 

in my post above (from my ER7206 which is far more capable then either version of ER605), you can see the CPU behaviour on the Sep 18th build.

 

On a router, with no VPNs set up, nothing connected apart from laptop over ethernet, and the WAN port.  Also confirmed by another user on his 605's and my own 605v2.  There were no config changed between flashing each firmware version.  Laptop not being used other than to gather the images for the screenshot.

 

Also, you mention your routers are running 1.2.1 - I am discussing the 1.2.2 beta builds released Sep 2nd and 18th

  0  
  0  
#12
Options
Re: ER605 ER7206 v1 - DHCP Server May Fail With 1.2.0 and 1.2.1 Firmware. [Updated on Sep. 19th 2022]
2022-09-20 13:59:38

GRL wrote

Also, you mention your routers are running 1.2.1 - I am discussing the 1.2.2 beta builds released Sep 2nd and 18th

  @GRL I mention v1.2.1 because I compare results from latest stable which i v1.2.1 with beta 1.2.2. 

GRL wrote

in my post above (from my ER7206 which is far more capable then either version of ER605), you can see the CPU behaviour on the Sep 18th build.

Seems it is not more capable than a working er605 without cpu spikes, whatever specifications tell you.

GRL wrote

 On a router, with no VPNs set up, nothing connected apart from laptop over ethernet, and the WAN port.  Also confirmed by another user on his 605's and my own 605v2. 

means it is not about er7206 or if it is more powerfull than er605, but about something else.

 

Since you ignore suggestion to check which process causes spikes, I guess you do not want to know it at all, seems I was a fool trying to help, guess best is if you simply wait until it is released or stay in contact with support supplying them with the information they require, until then downgrade your firmware to working one and if you have issues with dhcp, then use static ip's on your devices until it is fixed.

  0  
  0  
#13
Options
Re: ER605 ER7206 v1 - DHCP Server May Fail With 1.2.0 and 1.2.1 Firmware. [Updated on Sep. 19th 2022]
2022-09-20 14:12:02

  @btx 

 

I dont have an omada controller so not sure how exactly i would be able to see what is causing the CPU spikes on an otherwise pretty "factory" configured router with the only difference being firmware between the two, especially when there is no traffic....And, considering the noticed behavior happens immediately after flashing the Sep 18th build would seem to indicate pretty darn clearly that the issue lies with the firmware, not any config.  You can clearly see the difference in the two screenshots i have supplied.  You can even see the timestamps of when i flashed between the versions.

  0  
  0  
#14
Options
Re: ER605 ER7206 v1 - DHCP Server May Fail With 1.2.0 and 1.2.1 Firmware. [Updated on Sep. 19th 2022]
2022-09-20 14:25:11

  @GRL when you factory reset with your beta, do you experience spikes? Almost factory settings is not factory settings, 1 bit can change a lot.

 

You can test it with controller by simply installing controller on your pc if it is just about testing, it is not about if controlled by omada controller or not, it seems that some process spikes and if you run any process/task manager, you will see which process it is, from there on if there is ability to disable it, then disable it.

 

When you revert to 1.2.1, do you have any spikes and if not, why are you not using it?

  0  
  0  
#15
Options
Re: ER605 ER7206 v1 - DHCP Server May Fail With 1.2.0 and 1.2.1 Firmware. [Updated on Sep. 19th 2022]
2022-09-20 14:27:24

  @btx 

 

I am reverted to the 2nd sep build that doesnt have spikes, i posted the screenshots to back up what i, and another user were saying about the 18th build.

 

This was on a factory reset with just LAN dhcp range changed.

  0  
  0  
#16
Options
Re: ER605 ER7206 v1 - DHCP Server May Fail With 1.2.0 and 1.2.1 Firmware. [Updated on Sep. 19th 2022]
2022-09-20 14:36:58 - last edited 2022-10-13 10:16:19

EDIT

  0  
  0  
#17
Options
Re: ER605 ER7206 v1 - DHCP Server May Fail With 1.2.0 and 1.2.1 Firmware. [Updated on Sep. 19th 2022]
2022-09-20 17:12:48 - last edited 2022-09-20 17:13:27

  @btx 

 

I dont have a mission critical network, i host my own NAS which i like to access from elsewhere, but i have a number of systems on test for various customers.  So, im happy to test out new Betas as they are released.

 

And yes, have been in contact with support and sent over my configs, screenshots etc with a technician

  0  
  0  
#18
Options
Re: ER605 ER7206 v1 - DHCP Server May Fail With 1.2.0 and 1.2.1 Firmware. [Updated on Sep. 19th 2022]
2022-09-20 17:31:00 - last edited 2022-09-20 17:32:20

  @Fae 

 

Here is a disconnected, no-Wan, no traffic, factory reset no settings changed ER605 v2 with the same issue on the 18th sep build

No WiFi on the laptop.  Pin-hole reset 605v2 (after flash) only login password set to access GUI

 

  3  
  3  
#19
Options
Re: ER605 ER7206 v1 - DHCP Server May Fail With 1.2.0 and 1.2.1 Firmware. [Updated on Sep. 19th 2022]
2022-09-21 04:10:31

Is it possible to roll back to a previous version before 1.2.0 where there was no issue?  Sounds like both these beta's are having issues with CPU and I'd like to not bring down the entire network.

  0  
  0  
#20
Options
Re: ER605 ER7206 v1 - DHCP Server May Fail With 1.2.0 and 1.2.1 Firmware. [Updated on Sep. 19th 2022]
2022-09-21 06:31:12

Hi,

 

I also am using a ER605 v1, just updated to the 19th Sept beta and now getting this :

 

 

On previous versions i barely saw the CPUs move from 1%. This is on a 100megabit connection. 

  1  
  1  
#21
Options
123...

Tags

DHCP Service Highlighted Thread Official
Related Articles
ER605 ER7206 - “Use Fixed IP Address” (DHCP Reservation) Doesn't Take Effect. [Thread Closed]
21804 4
ER605 v2 2.1.1 DHCP issues
1266 0
ER605 ER7206 - IPTV screen freezes with error that the bandwidth is not enough.
3016 1
ER605 DHCP Routing Issues
544 0
ER605 DHCP option customization issues
1442 0
need information on ER7206 and ER605 routers
2913 1
About Us
Press
Copyright © TP-Link Systems Inc. All rights reserved.