I have a unity express module to install in CCM4.2.Here is part of the basic config
interface Loopback 0
ip address 10.19.153.1 255.255.255.0
I read that the loopback0 interface is that of the router.But the router was having another active interface(fastethernet 0/0) as default gateway for call manager.
Should i create another loopback interface and assign ip address to it or should i take the existing router interface as a loopback and modify his ip address ?