R3#sh run
R3#sh running-config 
Building configuration...

Current configuration : 904 bytes
!
version 15.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R3
!
!
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
!
!
!
!
!
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no ip domain-lookup
!
!
spanning-tree mode pvst
!
!
!
!
!
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interface Loopback209
 ip address 209.16.20.225 255.255.255.248
 ipv6 address 2001:CEED:DB8:209::225/64
!
interface GigabitEthernet0/0/0
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface GigabitEthernet0/0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/1/0
 no ip address
 clock rate 2000000
 shutdown
!
interface Serial0/1/1
 ip address 192.168.99.6 255.255.255.252
 ipv6 address 2001:ABCD:BEEF:20::2/64
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
ip flow-export version 9
!
!
!
banner motd ^CSTOP. Authorized Access Only!^C
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end