Hi @TeRRia 

Thanks for posting in our business forum.

TeRRia wrote

Hi,

On my ER707-M2 I can no longer modify any settings of the Wired Networks / LAN interfaces.

 

I get this message if I try: "The IP address of Gateway is used in DHCP Reservation."

 

Yet after verification looking at the client list, the IP address of the Gateway (i.e.: this router), isn't used in DHCP Reservation (I have many DHCP reservations but not the GW). 

What to do please ?

 

 

 

 

 

The error means to ask you to verify whether 192.168.0.254 is taken. Not the router's MAC to be reserved.

Are you certain that 192.168.0.254 is not taken?

Hi @TeRRia

TeRRia wrote

Hello  @Clive_A ,

 

Thank you for your fast response.

 

I confirm that 192.168.0.254 is not taken by any other device other than the router.

 

See below the list of clients filtered by IP@ and the list of devices with fixed IPs:

 

 

 

 

I don't understand what you want to do now.

Hi @TeRRia 

Thanks for posting in our business forum.

TeRRia wrote

  @Clive_A :

What I want is mentioned in my initial message:

 

"On my ER707-M2 I can no longer modify any settings of the Wired Networks / LAN interfaces.

 

I get this message if I try: "The IP address of Gateway is used in DHCP Reservation."

 

For instance, if I want to disable an unused LAN interface, change the DHCP server IP range, activate IGMP Snooping, I cannot. Each time I get this error message.

So, it has been set as 192.168.0.254 and you want to modify any of the parameters under the default VLAN 1 interface and without touching any of the IP range, simply enabling IGMP or anything like that, toggle functions, and it will pop up the error when you save it?

Did you look it up in the tab of the DHCP reservation to see if there is anything wrong with it?

Any ARP log in the log history?

Does this happen to other interfaces? What are other interfaces like?

Try to update the gateway IP, update the DHCP range, and set the range manually. Click Save and see if you can succeed?