Can someone explain the use of the loopback subnet mask.
Cisco's documentation reports many different options and is not consistent.
I.E
Interface loopback 20
ip address 192.168.20.1 255.255.255.0
---OR---
Interface loopback 20
ip address 192.168.20.1 255.255.255.252
---OR---
Interface loopback 20
ip address 192.168.20.1 255.255.255.255
If the loopback interface is only used for management, (and by many different protocols for many different reasons but Not routing), should this always be /32? Is there a method to the madness? Is there a reason to have something other than a /32 on the loopback interface?
Thanks again!
Frank