R4#sh run
!
hostname R4
!
!
no ip domain lookup
ip cef
ipv6 unicast-routing
ipv6 cef
ipv6 multicast rpf use-bgp
!
!
interface Loopback0
 ip address 4.4.4.4 255.255.255.255
!
interface Loopback104
 ip address 172.16.104.1 255.255.255.0
!
interface Ethernet0/0
 ip address 10.0.0.4 255.255.255.0
 no shutdown
!
interface Ethernet0/1
 ip address 172.16.46.4 255.255.255.0
 ipv6 address 2005:DEAD:BEEF:46::4/80
 no shutdown
!
interface Ethernet0/2
 no ip address
 shutdown
!
interface Ethernet0/3
 no ip address
 shutdown
!
interface Serial1/0
 ip address 172.16.45.4 255.255.255.0
 ipv6 address 2005:DEAD:BEEF:45::4/80
 no shutdown
!
interface Serial1/1
 ip address 172.16.43.4 255.255.255.0
 ipv6 address 2005:DEAD:BEEF:43::4/80
 no shutdown
!
interface Serial1/2
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial1/3
 no ip address
 shutdown
 serial restart-delay 0
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
line vty 0 4
 login
 transport input all
!
!
end