I currently have two 7206VXR routers serving DHCP addresses to several thousand subs. We are in the process of re-IPing the network and want to minimize impact as much as possible.
Can I have two ip unnumbered loopback interfaces active at the same time on one ATM sub-interface? If so we can keep service up for subscribers on the old scope until their lease expires - then they will renew off of the new scope.
Current config below (with fictional IP's)
rbe nasip Loopback10
ip address 18.104.22.168 255.255.248.0
interface ATM1/0.200 point-to-point
description IMAS DHCP
ip unnumbered Loopback10
ip helper-address 22.214.171.124
atm route-bridged ip
range pvc 10/33 10/5000