hostname R2
!
!
username cisco123 privilege 15 password 0 cisco123
!
!
spanning-tree mode pvst
!
!
interface FastEthernet0/0
 ip address 172.16.1.2 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 172.17.1.2 255.255.255.0
 duplex auto
 speed auto
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
ip route 10.20.10.0 255.255.255.0 172.17.1.1 
ip route 10.10.10.0 255.255.255.0 172.16.1.1 
!
!
line con 0
 login local
!
line aux 0
!
line vty 0 4
 login local
 privilege level 15
!
!