In The World Without Limitation

BGP Route Reflectors dan BGP Confederations

Posted on July 21, 2009. Filed under: Sinau Cisco |

Reflector – berfungsi untuk memantulkan kembali route2 yg diterima oleh sebuah router ke neighbor – walhasil = adjacency atau bahkan routing-loop. jgn lupa bahwa pada dynamic-routing dgn OSPF maupun BGP pun terdapat routing-loop.reflector – berfungsi untuk memantulkan kembali route2 yg diterima oleh sebuah router ke neighbor – walhasil = adjacency atau bahkan routing-loop. jgn lupa bahwa pada dynamic-routing dgn OSPF maupun BGP pun terdapat routing-loop.

Topologi

Disini saya menggunkan Multi layer switch cisco switch 3350

konfigurasi SW1

!
interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet0/1
no switchport
ip address 12.12.12.1 255.255.255.252
!
interface FastEthernet0/2
no switchport
ip address 32.32.32.1 255.255.255.252
!

Untuk SW2

!
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet0/1
no switchport
ip address 12.12.12.2 255.255.255.252
!
interface FastEthernet0/2
no switchport
ip address 23.23.23.1 255.255.255.252
!

Untuk SW3

!
interface Loopback0
ip address 3.3.3.3 255.255.255.255
!
interface FastEthernet0/1
no switchport
ip address 23.23.23.2 255.255.255.252
!

Dan untuk SW4

interface Loopback0
ip address 4.4.4.4 255.255.255.255
!
interface FastEthernet0/1
no switchport
ip address 32.32.32.2 255.255.255.252
!

Untuk proses routing
padaSW1

SW1(config)#router bgp 100
SW1(config-router)#network 1.1.1.1 mask 255.255.255.255
SW1(config-router)#network 12.12.12.0 mask 255.255.255.252
SW1(config-router)#neighbour 2.2.2.2 remote-as 100
SW1(config-router)#neighbor 2.2.2.2 route-reflector-client
SW1(config-router)#neighbour 2.2.2.2 update-source loopback0
SW1(config-router)#neighbour 4.4.4.4 remote-as 100
SW1(config-router)#neighbor 4.4.4.4 route-reflector-client
SW1(config-router)#neighbour 4.4.4.4 update-source loopback0

Setelah itu kita berikan routing static untuk menghubungkannya

SW1(config)ip route 2.2.2.2 255.255.255.255 fa0/1

Lanjut ke SW2

SW2(config)#router bgp 100
SW2(config-router)#network 2.2.2.2.2 mask 255.255.255.255
SW2(config-router)#network 12.12.12.0 mask 255.255.255.252
SW2(config-router)#network 23.23.23.0 mask 255.255.255.252
SW2(config-router)#neighbour 1.1.1.1 remote-as 100
SW2(config-router)#neighbour 1.1.1.1 update-source loopback0
SW2(config-router)#neighbour 1.1.1.1 next-hop-self
SW2(config-router)#neighbour 3.3.3.3 remote-as 100
SW2(config-router)#neighbour 3.3.3.3 update-source loopback0
SW2(config-router)#neighbour 3.3.3.3 ebgp-multihop 2

Berikan routing static untuk menghubungkannya

ip route 1.1.1.1 255.255.255.255 fa0/1
ip route 3.3.3.3 255.255.255.255 fa0/2

Teruskan ke R3

SW3(config)#router bgp 200
SW3(config-router)#network 3.3.3.3 mask 255.255.255.255
SW3(config-router)#network 23.23.23.0 mask 255.255.255.252
SW3(config-router)#neighbour 2.2.2.2 remote-as 100
SW3(config-router)#neighbour 2.2.2.2 update-source loopback0
SW3(config-router)#neighbour 2.2.2.2 ebgp-multihop 2

Berikan juga routing staticnya

ip route 2.2.2.2 255.255.255.255 fa0/1

pada SW4

SW4(config)#router bgp 100
SW4(config-router)#network 4.4.4.4 mask 255.255.255.255
SW4(config-router)#network 32.32.32.0 mask 255.255.255.252
SW4(config-router)#neighbour 1.1.1.1 remote-as 100
SW4(config-router)#neighbour 1.1.1.1 update-source loopback0

Berikan juga routing staticnya

ip route 1.1.1.1 255.255.255.255 fa0/1
ip route 2.2.2.2 255.255.255.255 fa0/1

Inilah hasilnya

BGP Confederations
topologi

BGP Confederations adalah suatu upaya memecah menjadi AS-AS secara kecil namamun jika AS lain melihanya adalah satu AS yang besar.

Disini saya kembali manggunkan multi layer switch 3350
Untuk konfigurasi dasar sama seperti diatas

Untuk Proses routing pada SW1

router bgp 1001
no synchronization
bgp log-neighbor-changes
bgp confederation identifier 100
bgp confederation peers 1002 1003
network 1.1.1.1 mask 255.255.255.255
network 12.12.12.0 mask 255.255.255.252
network 32.32.32.0 mask 255.255.255.252
neighbor 2.2.2.2 remote-as 1002
neighbor 2.2.2.2 ebgp-multihop 3
neighbor 2.2.2.2 update-source Loopback0
neighbor 4.4.4.4 remote-as 1003
neighbor 4.4.4.4 ebgp-multihop 3
neighbor 4.4.4.4 update-source Loopback0
no auto-summary
!
ip classless
ip route 2.2.2.2 255.255.255.255 FastEthernet0/1
ip route 4.4.4.4 255.255.255.255 FastEthernet0/2
!

Pada SW2

router bgp 1002
no synchronization
bgp log-neighbor-changes
bgp confederation identifier 100
bgp confederation peers 1001 1003
network 2.2.2.2 mask 255.255.255.255
network 12.12.12.0 mask 255.255.255.252
network 23.23.23.0 mask 255.255.255.252
neighbor 1.1.1.1 remote-as 1001
neighbor 1.1.1.1 ebgp-multihop 3
neighbor 1.1.1.1 update-source Loopback0
neighbor 1.1.1.1 next-hop-self
neighbor 3.3.3.3 remote-as 200
neighbor 3.3.3.3 ebgp-multihop 3
neighbor 3.3.3.3 update-source Loopback0
neighbor 4.4.4.4 remote-as 1003
neighbor 4.4.4.4 update-source Loopback0
neighbor 4.4.4.4 next-hop-self
no auto-summary
!
ip classless
ip route 1.1.1.1 255.255.255.255 FastEthernet0/1
ip route 3.3.3.3 255.255.255.255 FastEthernet0/2
ip route 4.4.4.4 255.255.255.255 FastEthernet0/1
!

Pada SW3

router bgp 200
no synchronization
bgp log-neighbor-changes
network 3.3.3.3 mask 255.255.255.255
network 23.23.23.0 mask 255.255.255.252
neighbor 2.2.2.2 remote-as 100
neighbor 2.2.2.2 ebgp-multihop 3
neighbor 2.2.2.2 update-source Loopback0
no auto-summary
!
ip classless
ip route 2.2.2.2 255.255.255.255 FastEthernet0/1

Pada SW4

router bgp 1003
no synchronization
bgp log-neighbor-changes
bgp confederation identifier 100
bgp confederation peers 1001 1002
network 4.4.4.4 mask 255.255.255.255
network 32.32.32.0 mask 255.255.255.252
neighbor 1.1.1.1 remote-as 1001
neighbor 1.1.1.1 ebgp-multihop 3
neighbor 1.1.1.1 update-source Loopback0
no auto-summary
!
ip classless
ip route 1.1.1.1 255.255.255.255 FastEthernet0/1
ip route 2.2.2.2 255.255.255.255 FastEthernet0/1

inilah hasilnya

CMIIW

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