RT1#sh run
Building configuration...

Current configuration:
!
hostname RT1
!
!
!
!
!
ipv6 unicast-routing
!
!
!
!
!
syslog buffer 64 level DEBUG class ALL 
!
!
!
!
!
isdn switch-type basic-5ess
!
!
!
aaa authentication login default local
aaa authentication enable default none
aaa authentication ppp default local
aaa authorization exec default local
!
username admin password 0 admin
username RT2 password 0 Pass-1234
!
!
!
crypto key load-keyconf end
!
!
interface Loopback1
 ip address 10.10.5.1 255.255.255.255
 no ip directed-broadcast
 ipv6 address 2001:0:10:5::1/128
 ipv6 ospf 1 area 0 
!
interface Loopback2
 ip address 10.10.5.2 255.255.255.255
 no ip directed-broadcast
 ipv6 address 2001:0:10:5