@Solla-topee resolved!!! It was a router's problem, not RE. The DHCP service was flagged but it was sleeping. Reboot the router and it works Tks

@Solla-topee many thanks for the answer. The problems are: 1) it doesn't recognize that there is a dhc server 2) it gives its address as gateway, and I can't change it as you can see in the...

in the web interface of the RE is not possible to see and change the DHCP paramters. I need to disalbe it or, at least, change the default gateway gived to the clients can you help me?