This Article Applies to:

 

ER605_v1 or ER7206_v1 managed by Omada SDN Controller v4

 

Background:

 

The Omada SDN Controller supports configuring Use Fixed IP Address (DHCP reservation) for the connected clients.

 

 

With Omada SDN Controller v4.2.11 and below version, there is no limitation on the Fixed IP Address (DHCP reservation) feature, it is possible to input the same fixed IP address for multiple clients, and this kind of improper configuration may cause the Omada Gateway’s DHCP service down.

 

To avoid such issue from happening, the limitation has been added on Omada SDN Controller v4.3.5 and above version, if you are configuring the same fixed IP address for another client, the following error message will be prompted:

 

 

However, the limitation only applies to the new configurations. The previous improper configurations won’t be removed themselves after you upgrade to the new firmware, which may still result in the DHCP service failure.

 

The gateway 1.0.1 firmware fixed the DHCP issue before, which may help for the case, but the problem may reappear after upgrading to new firmware 1.1.1. Related post can be found HERE.

 

Available Solutions:

 

The Omada Controller v5 will support showing the reserved IP addresses in a table, and the new gateway firmware compatible with Controller v5 will also ignore the duplicated DHCP reservation to avoid the DHCP service failure.

 

At present, to fix the DHCP issue thoroughly, please correct the DHCP reservation for the clients, ensure that all clients have a unique fixed IP address: 

 

1) Go to Insights -> Known Clients -> each client’s Config  to check the Fixed IP address,

2) Find out the duplicated DHCP reservation and correct it, then restart the gateway.

 

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If you get too many known clients to locate the duplicated reservation, please feel free to email us for further assistance.

 

Email to: <support.forum@tp-link.com> 

Subject: [Forum ID 274280] Omada Gateway’s DHCP NOT Working After Upgrading to Firmware 1.1.1

Content:

1. the Omada Controller version,

2. the backup file of the Omada Controller.

 

Thank you for your great cooperation and patience!

TP-Link Support Team