Belajar Mengkonfigurasi BGP

Belajar Mengkonfigurasi BGP 
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Topology yang digunakan :
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Konfigurasi Router cnc1
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cnc1#
interface Loopback100
 ip address 192.168.2.1 255.255.255.0
!
interface FastEthernet0/0
 ip address 10.0.0.1 255.255.255.252
 duplex auto
 speed auto
!
interface Serial1/0
 ip address 172.16.0.2 255.255.255.252
 serial restart-delay 0
!
router ospf 1
 log-adjacency-changes
 network 10.0.0.1 0.0.0.0 area 0
 network 192.168.2.0 0.0.0.255 area 1
!
router bgp 100
 no synchronization
 bgp log-neighbor-changes
 redistribute ospf 1 route-map lan-subnet
 neighbor 10.0.0.2 remote-as 100
 neighbor 172.16.0.1 remote-as 200
 no auto-summary
!
access-list 10 permit 192.168.0.0 0.0.255.255
!
route-map lan-subnet permit 10
 match ip address 10
 set metric 100
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Konfigurasi Router cnc2
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cnc2#
interface Loopback100
 ip address 192.168.1.1 255.255.255.0
!
interface Serial1/0
 ip address 172.16.0.1 255.255.255.252
 serial restart-delay 0
!
interface Serial1/1
 ip address 172.16.0.5 255.255.255.252
 serial restart-delay 0
!
router bgp 200
 no synchronization
 bgp log-neighbor-changes
 network 172.16.0.0 mask 255.255.255.252
 network 172.16.0.4 mask 255.255.255.252
 network 192.168.1.0
 neighbor iwing peer-group
 neighbor iwing remote-as 100
 neighbor 172.16.0.2 peer-group iwing
 neighbor 172.16.0.6 peer-group iwing
 no auto-summary
!
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Konfigurasi Router cnc3
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cnc3#
interface Loopback100
 ip address 192.168.3.1 255.255.255.0
!
interface FastEthernet0/0
 ip address 10.0.0.2 255.255.255.252
 duplex auto
 speed auto
!
interface Serial1/1
 ip address 172.16.0.6 255.255.255.252
 serial restart-delay 0
!
router ospf 1
 log-adjacency-changes
 network 10.0.0.2 0.0.0.0 area 0
 network 192.168.3.0 0.0.0.255 area 2
!
router bgp 100
 no synchronization
 bgp log-neighbor-changes
 redistribute ospf 1 route-map lan-subnet
 neighbor 10.0.0.1 remote-as 100
 neighbor 172.16.0.5 remote-as 200
 no auto-summary
!
access-list 10 permit 192.168.0.0 0.0.255.255
!
route-map lan-subnet permit 10
 match ip address 10
 set metric 100
!
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how to check 1 (sh ip route)
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cnc1#sh ip route
Codes: C - connected, S - static, 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
 i - IS-IS, su - IS-IS summary, 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

 172.16.0.0/30 is subnetted, 2 subnets
B       172.16.0.4 [20/0] via 172.16.0.1, 00:22:20
C       172.16.0.0 is directly connected, Serial1/0
 10.0.0.0/30 is subnetted, 1 subnets
C       10.0.0.0 is directly connected, FastEthernet0/0
B    192.168.1.0/24 [20/0] via 172.16.0.1, 00:30:28
C    192.168.2.0/24 is directly connected, Loopback100
 192.168.3.0/24 is variably subnetted, 2 subnets, 2 masks
O IA    192.168.3.1/32 [110/2] via 10.0.0.2, 00:41:53, FastEthernet0/0
B       192.168.3.0/24 [200/100] via 10.0.0.2, 00:31:04
cnc1#
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cnc2#sh ip route
Codes: C - connected, S - static, 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
 i - IS-IS, su - IS-IS summary, 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

 172.16.0.0/30 is subnetted, 2 subnets
C       172.16.0.4 is directly connected, Serial1/1
C       172.16.0.0 is directly connected, Serial1/0
C    192.168.1.0/24 is directly connected, Loopback100
 192.168.2.0/24 is variably subnetted, 2 subnets, 2 masks
B       192.168.2.0/24 [20/0] via 172.16.0.6, 00:22:33
B       192.168.2.1/32 [20/0] via 172.16.0.2, 00:31:31
 192.168.3.0/24 is variably subnetted, 2 subnets, 2 masks
B       192.168.3.1/32 [20/0] via 172.16.0.6, 00:22:33
B       192.168.3.0/24 [20/0] via 172.16.0.2, 00:31:31
cnc2#
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cnc3#sh ip route
Codes: C - connected, S - static, 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
 i - IS-IS, su - IS-IS summary, 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

 172.16.0.0/30 is subnetted, 2 subnets
C       172.16.0.4 is directly connected, Serial1/1
B       172.16.0.0 [20/0] via 172.16.0.5, 00:22:20
 10.0.0.0/30 is subnetted, 1 subnets
C       10.0.0.0 is directly connected, FastEthernet0/0
B    192.168.1.0/24 [20/0] via 172.16.0.5, 00:22:20
 192.168.2.0/24 is variably subnetted, 2 subnets, 2 masks
B       192.168.2.0/24 [200/100] via 10.0.0.1, 00:31:35
O IA    192.168.2.1/32 [110/2] via 10.0.0.1, 00:42:24, FastEthernet0/0
C    192.168.3.0/24 is directly connected, Loopback100
cnc3#
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how to check 2 (ping)
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cnc1#ping 192.168.1.1 source 192.168.2.1 repeat 100

Type escape sequence to abort.
Sending 100, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
Packet sent with a source address of 192.168.2.1
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (100/100), round-trip min/avg/max = 4/98/244 ms
cnc1#

cnc3#ping 192.168.1.1 source 192.168.3.1 repeat 100

Type escape sequence to abort.
Sending 100, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
Packet sent with a source address of 192.168.3.1
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (100/100), round-trip min/avg/max = 16/102/260 ms
cnc3#
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ref:
[1]. BGP part 1 and part 2, URL: http://packetlife.net ,(Juli 2010)