Configuration for Router A (EBGP for B)
Current configuration : 1294 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname A
!
no logging console
enable password ali
!
!
!
!
!
ip subnet-zero
!
ip cef
ip audit notify log
ip audit po max-events 100
!
!
!
!
!
!
!
interface Loopback0
ip address 10.1.1.1 255.0.0.0
!
interface FastEthernet0/0
no ip address
shutdown
half-duplex
!
interface Serial1/0
ip address 4.1.1.2 255.0.0.0
no keepalive
shutdown
serial restart-delay 0
clockrate 64000
!
interface Serial1/1
ip address 1.1.1.1 255.0.0.0
no keepalive
serial restart-delay 0
clockrate 64000
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/4
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/5
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/6
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/7
no ip address
shutdown
serial restart-delay 0
!
router bgp 100
no synchronization
bgp log-neighbor-changes
network 10.1.1.1
network 10.0.0.0
neighbor 1.1.1.2 remote-as 200
!
ip classless
no ip http server
!
!
!
line con 0
line aux 0
line vty 0 4
password ali
login
!
end
Configuration for Router B
Current configuration : 1591 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname B
!
no logging console
enable password ali
!
!
!
!
!
ip subnet-zero
!
ip cef
ip audit notify log
ip audit po max-events 100
!
!
!
!
!
!
!
interface Loopback0
ip address 20.1.1.1 255.0.0.0
!
interface Loopback1
ip address 192.168.1.16 255.255.255.0
!
interface FastEthernet0/0
no ip address
shutdown
half-duplex
!
interface Serial1/0
ip address 1.1.1.2 255.0.0.0
no keepalive
serial restart-delay 0
clockrate 64000
!
interface Serial1/1
ip address 2.1.1.1 255.0.0.0
no keepalive
serial restart-delay 0
clockrate 64000
!
interface Serial1/2
ip address 4.1.1.1 255.0.0.0
no keepalive
serial restart-delay 0
clockrate 64000
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/4
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/5
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/6
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/7
no ip address
shutdown
serial restart-delay 0
!
router rip
network 1.0.0.0
network 2.0.0.0
network 3.0.0.0
network 20.0.0.0
!
router bgp 200
bgp router-id 20.1.1.1
bgp cluster-id 3232235792
bgp log-neighbor-changes
network 1.0.0.0
network 2.0.0.0
network 4.0.0.0
network 20.0.0.0
neighbor 1.1.1.1 remote-as 100
neighbor 3.1.1.2 remote-as 200
neighbor 3.1.1.2 next-hop-self
!
ip classless
no ip http server
!
!
!
line con 0
line aux 0
line vty 0 4
password ali
login
!
end
Configuration for Router C (non-ibgp peer)
Current configuration : 1240 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname C
!
no logging console
enable password ali
!
!
!
!
!
ip subnet-zero
!
ip cef
ip audit notify log
ip audit po max-events 100
!
!
!
!
!
!
!
interface Loopback0
ip address 30.1.1.1 255.0.0.0
!
interface FastEthernet0/0
no ip address
shutdown
half-duplex
!
interface Serial1/0
ip address 2.1.1.2 255.0.0.0
no keepalive
serial restart-delay 0
clockrate 64000
!
interface Serial1/1
ip address 3.1.1.1 255.0.0.0
no keepalive
serial restart-delay 0
clockrate 64000
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/4
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/5
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/6
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/7
no ip address
shutdown
serial restart-delay 0
!
router rip
redistribute bgp 200
network 2.0.0.0
network 3.0.0.0
network 30.0.0.0
!
ip classless
no ip http server
!
!
!
line con 0
line aux 0
line vty 0 4
password ali
login
!
end
ROUTER D (cannot ping A's loopback)
Current configuration : 1294 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname D
!
no logging console
enable password ali
!
!
!
!
!
ip subnet-zero
!
ip cef
ip audit notify log
ip audit po max-events 100
!
!
!
!
!
!
!
interface Loopback0
ip address 40.1.1.1 255.0.0.0
!
interface FastEthernet0/0
no ip address
shutdown
half-duplex
!
interface Serial1/0
ip address 3.1.1.2 255.0.0.0
no keepalive
serial restart-delay 0
clockrate 64000
!
interface Serial1/1
ip address 4.1.1.2 255.0.0.0
no keepalive
serial restart-delay 0
clockrate 64000
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/4
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/5
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/6
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/7
no ip address
shutdown
serial restart-delay 0
!
router rip
network 3.0.0.0
network 40.0.0.0
!
router bgp 200
bgp log-neighbor-changes
network 40.0.0.0
neighbor 2.1.1.1 remote-as 200
!
ip classless
no ip http server
!
!
!
line con 0
line aux 0
line vty 0 4
password ali
login
!
end