I may be misunderstanding what you can do with a Router's loopback interface. I am trying to ping it from a PC on the same network.
I am using Packet Tracer to simulate this, a Cisco 1841 and a PC from within the program.
interface Loopback0 ip address 192.168.254.1 255.255.255.0 ! interface FastEthernet0/0 no ip address duplex auto speed auto ! interface FastEthernet0/1 no ip address duplex auto speed auto
IP -- 192.168.254.5 255.255.255.0
Diagram from Packet Tracer
Not sure if this is possible, or maybe I'm really not understanding the loopback interface, but I am trying to dive into OSPF and want to understand other ways to use the Loopback Interfaces on Routers.
If I am completely wrong, just let me know :)