R1: interface GigabitEthernet0/0/0 ip address 10.1.1.1 255.255.255.0 interface LoopBack0 ip address 1.1.1.1 255.255.255.255 ospf 1 area 0.0.0.0 authentication-mode simple cipher %$%$161;31hu7pR1;31hu7pR%9Pe-`^*yY9[%1;31hu7p