en 
conf t

line con 0
 exec-timeout 0 0
 logging synchronous

hostname p1r1

interface Serial0/0
 ip address 192.168.1.17 255.255.255.240
 no shut

interface Serial0/1
 ip address 192.168.1.33 255.255.255.240
 no shut

interface Serial0/2
 ip address 192.168.1.49 255.255.255.240
 no shut
!
interface Serial0/3
 description currently a DTE interface
 ip address 10.1.1.1 255.255.255.0
 no shut

router bgp 65101
 no synchronization
 network 10.0.0.0
 network 192.168.1.0
 neighbor 10.1.1.100 remote-as 65200
 neighbor 192.168.1.18 remote-as 65101
 neighbor 192.168.1.34 remote-as 65101
 neighbor 192.168.1.50 remote-as 65101

 neighbor 192.168.1.18 route-reflector-client
 neighbor 192.168.1.34 route-reflector-client
 neighbor 192.168.1.50 route-reflector-client

end

copy run start



en
conf t
router bgp 65101
 no synchronization
 network 10.0.0.0
 network 192.168.1.0
 neighbor 10.1.1.100 remote-as 65200
 neighbor 192.168.1.18 remote-as 65101
 no neighbor 192.168.1.18 route-reflector-client
 neighbor 192.168.1.34 remote-as 65101
 no neighbor 192.168.1.34 route-reflector-client
 neighbor 192.168.1.50 remote-as 65101
 no neighbor 192.168.1.50 route-reflector-client
end

clear ip bgp *


en
conf t
router bgp 65101
 no synchronization
 network 10.0.0.0
 network 192.168.1.0
 neighbor 10.1.1.100 remote-as 65200
 neighbor 192.168.1.18 remote-as 65101
 neighbor 192.168.1.34 remote-as 65101
 neighbor 192.168.1.50 remote-as 65101

 neighbor 192.168.1.18 route-reflector-client
 neighbor 192.168.1.34 route-reflector-client
 neighbor 192.168.1.50 route-reflector-client
end

clear ip bgp *

______________________________

en
conf t
router bgp 65101
neighbor 10.1.1.100 prefix-list test in
exit
ip prefix-list test permit 172.16.10.0/24
end

clear ip bgp *

p1r1#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     172.16.0.0/24 is subnetted, 1 subnets
B       172.16.10.0 [20/0] via 10.1.1.100, 00:00:14
     172.26.0.0/28 is subnetted, 3 subnets
B       172.26.1.48 [200/0] via 192.168.1.50, 00:00:23
B       172.26.1.32 [200/0] via 192.168.1.50, 00:00:23
B       172.26.1.16 [200/0] via 192.168.1.50, 00:00:23
     10.0.0.0/24 is subnetted, 1 subnets
C       10.1.1.0 is directly connected, Serial0/3
     192.168.1.0/28 is subnetted, 3 subnets
C       192.168.1.32 is directly connected, Serial0/1
C       192.168.1.48 is directly connected, Serial0/2
C       192.168.1.16 is directly connected, Serial0/0
B    192.168.101.0/24 [200/0] via 192.168.1.18, 00:00:27

________________________

en
conf t
router bgp 65101
no neighbor 10.1.1.100 prefix-list test in
exit
no ip prefix-list test permit 172.16.10.0/24
end

clear ip bgp *

___________________

p1r1#sh ip route
15:46:47: %BGP-5-ADJCHANGE: neighbor 10.1.1.100 Up
p1r1#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     172.16.0.0/24 is subnetted, 2 subnets
B       172.16.10.0 [20/0] via 10.1.1.100, 00:00:03
B       172.16.11.0 [20/0] via 10.1.1.100, 00:00:03
     172.26.0.0/28 is subnetted, 3 subnets
B       172.26.1.48 [200/0] via 192.168.1.50, 00:00:17
B       172.26.1.32 [200/0] via 192.168.1.50, 00:00:17
B       172.26.1.16 [200/0] via 192.168.1.50, 00:00:17
     10.0.0.0/24 is subnetted, 3 subnets
B       10.4.4.0 [20/0] via 10.1.1.100, 00:00:03
B       10.3.3.0 [20/0] via 10.1.1.100, 00:00:03
C       10.1.1.0 is directly connected, Serial0/3
     192.168.1.0/28 is subnetted, 3 subnets
C       192.168.1.32 is directly connected, Serial0/1
C       192.168.1.48 is directly connected, Serial0/2
C       192.168.1.16 is directly connected, Serial0/0
B    192.168.101.0/24 [200/0] via 192.168.1.18, 00:00:31

___________________________________