R1#show ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset administratively down down
Serial1/0 172.16.0.1 YES manual up down
Serial1/1 unassigned YES unset up down
Serial1/2 unassigned YES unset administratively down down
Serial1/3 unassigned YES unset administratively down down
Loopback1 1.1.1.1 YES manual up up
interface Loopback1
ip address 1.1.1.1 255.255.0.0
!
interface FastEthernet0/0
no ip address
shutdown
duplex half
!
interface Serial1/0
ip address 172.16.0.1 255.255.0.0
serial restart-delay 0
!
interface Serial1/1
no ip address
serial restart-delay 0
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
router rip
network 1.0.0.0
network 172.16.0.0
R2#show ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset administratively down down
Serial1/0 172.16.0.2 YES manual up down
Serial1/1 162.16.0.3 YES manual up up
Serial1/2 unassigned YES unset administratively down down
Serial1/3 unassigned YES unset administratively down down
Loopback2 2.2.2.2 YES manual up up
interface Loopback2
ip address 2.2.2.2 255.255.0.0
!
interface FastEthernet0/0
no ip address
shutdown
duplex half
!
interface Serial1/0
ip address 172.16.0.2 255.255.0.0
serial restart-delay 0
clock rate 64000
!
interface Serial1/1
ip address 162.16.0.3 255.255.0.0
serial restart-delay 0
clock rate 64000
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
router rip
network 2.0.0.0
network 162.16.0.0
network 172.16.0.0
R3#show ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset administratively down down
Serial1/0 unassigned YES unset administratively down down
Serial1/1 162.16.0.5 YES manual up up
Serial1/2 unassigned YES unset administratively down down
Serial1/3 unassigned YES unset administratively down down
Loopback3 3.3.3.3 YES manual up up
interface Loopback3
ip address 3.3.3.3 255.255.0.0
!
interface FastEthernet0/0
no ip address
shutdown
duplex half
!
interface Serial1/0
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/1
ip address 162.16.0.5 255.255.0.0
serial restart-delay 0
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
router rip
network 3.0.0.0
network 162.16.0.0