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Omada DHCP SRV constantly assigning IP addresses

Omada DHCP SRV constantly assigning IP addresses

Omada DHCP SRV constantly assigning IP addresses
Omada DHCP SRV constantly assigning IP addresses
2025-02-13 10:05:54 - last edited 2025-03-05 01:17:42
Tags: #Network Connectivity #WAN Setup #DHCP Service
Model: ER7206 (TL-ER7206)   T1500G-10PS(TL-SG2210P)   EAP620 HD  
Hardware Version:
Firmware Version: 5.15.8.2

Hi,
 

A number of users are reporting problems with the wifi network, as they are experiencing untimely disconnection. This mainly concerns Chrome OS & Mac OS devices.

 

I can't see any configuration or coverage problems, but when I analyze the logs I can but notice abnormal behavior at the DHCP server level that seems to correlate with disconnections, when a client undergoes a disconnection, we can see this: 

 




I don't understand why the DHCP server repeatedly allocates the same IP address to the same device in such a short time? Strangely, clients are disconnected every time this happens.

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1 Accepted Solution
Re:Omada DHCP SRV constantly assigning IP addresses-Solution
2025-03-04 15:21:19 - last edited 2025-03-05 01:17:42

Hi,
 

Tplink support helped me.
 

After taking control of my PC and consulting the config of my controller, they did not notice any configuration problem, they provided me with new firmware for my EAP660HD terminals (not publicly available), this solved the problem of accidental disconnection of my clients, and reduced the number of IP assignments in the logs even the assignments are still present to a lesser extent.

Recommended Solution
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#6
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6 Reply
Re:Omada DHCP SRV constantly assigning IP addresses
2025-02-13 23:49:16

Hi @Thomas777,

 

Have you verified that there are not any other devices using addresses within your dhcp pool range?

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#2
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Re:Omada DHCP SRV constantly assigning IP addresses
2025-02-19 06:54:22

Hi @Thomas777 

Thanks for posting in our business forum.

Have you resolved this?

It seems that the device is constantly requesting the DHCP IP. It repeatedly sends DHCP request and the router keeps assigning the new IP.

How Does DHCP Work? Common Questions and Solutions

 

Wireshark and see how your device works?

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced. ● I don't provide ETA for any products/features. No comment.
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#3
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Re:Omada DHCP SRV constantly assigning IP addresses
2025-02-19 08:26:25

  Hi @Clive_A 
 

No, the problem still hasn't been solved, and it applies to multiple customers. 
I opened a TpLink support ticket about this 6 days ago and I still haven't received an answer.

 

According to my research, the only option I have is to switch to fixed IP on the WAN, but there's a bug in the interface that prevents this configuration from being applied, as is the case on this post: https://community.tp-link.com/en/business/forum/topic/682044?replyId=1483648

 

I've also opened a support ticket but no solution has been proposed yet. As a partner, we're the only ones dealing with the problems encountered by our customers, and that's bad for business.

 

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#4
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Re:Omada DHCP SRV constantly assigning IP addresses
2025-02-19 08:41:00

Hi @Thomas777 

Thanks for posting in our business forum.

Thomas777 wrote

  Hi @Clive_A 
 

No, the problem still hasn't been solved, and it applies to multiple customers. 
I opened a TpLink support ticket about this 6 days ago and I still haven't received an answer.

 

According to my research, the only option I have is to switch to fixed IP on the WAN, but there's a bug in the interface that prevents this configuration from being applied, as is the case on this post: https://community.tp-link.com/en/business/forum/topic/682044?replyId=1483648

 

I've also opened a support ticket but no solution has been proposed yet. As a partner, we're the only ones dealing with the problems encountered by our customers, and that's bad for business.

 

What I proposed is a way to verify the case and with that information, that's a lead to discover the reason why. Now with this log and no more information, it does not make progress.

 

Wireshark at least tells if it is the router malfunctions or the client constantly requests the IP. Up to you. You can follow the ticket and see how they respond.

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced. ● I don't provide ETA for any products/features. No comment.
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#5
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Re:Omada DHCP SRV constantly assigning IP addresses-Solution
2025-03-04 15:21:19 - last edited 2025-03-05 01:17:42

Hi,
 

Tplink support helped me.
 

After taking control of my PC and consulting the config of my controller, they did not notice any configuration problem, they provided me with new firmware for my EAP660HD terminals (not publicly available), this solved the problem of accidental disconnection of my clients, and reduced the number of IP assignments in the logs even the assignments are still present to a lesser extent.

Recommended Solution
  0  
  0  
#6
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Re:Omada DHCP SRV constantly assigning IP addresses
2025-03-05 01:16:24 - last edited 2025-03-05 01:17:37

Hi @Thomas777 

Thanks for posting in our business forum.

What's the WIFI signal for these devices?

Looks like they are not stable on the WIFI and resends the DHCP request.

I assume that this does not happen to any wired clients?

 

What about the Wireshark result?

How Does DHCP Work? Common Questions and Solutions

 

Like what I thought. WIFI issue. Not the router. smiley

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced. ● I don't provide ETA for any products/features. No comment.
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#7
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