interface loopback 1
    ip address 192.168.1.1 255.255.255.255
    description "interface loopback 1"
    no shut
interface loopback 2
    ip address 192.168.2.1 255.255.255.255
    description "interface loopback 2"
    no shut
interface loopback 3
    ip address 192.168.3.1 255.255.255.255
    description "interface loopback 3"
    no shut
interface loopback 4
    ip address 192.168.4.1 255.255.255.255
    description "interface loopback 4"
    no shut