yes, i know.
i was saying that because the "trick" Slender proposed only works for PPoE... As for each PPP session you will have a new IP so disconnecting / reconnecting instantly wan port only works for PPPoE because new session = new IP. While in IPoE DHCP you always have a lease time so you have to wait X amount of time before the server assign your router a new IP.
From the bunch of ISP i have used in the past that use IPoE DHCP the lease time was 6h at minimum so yeah... if someone absolutely want to change IP as you said; just unplug the router/modem before going to sleep.
Maybe some ISP have shorter lease time but from my knowledge i have never seen a lease time under 6 min. Most of the time it is a couple hours...
