Lab 91. BGP Confederation

Objective : 

• Mengetahui solusi untuk konfigurasi full mesh yang ada pada iBGP, yakni dengan dikonfigurasikan dalam BGP Confederation
• Dengan BGP Confederation, maka dibuat beberapa sub-AS didalam AS 12 sehingga seolah-olah seperti eBGP. Karena pada eBGP tidak memerlukan full mesh peering

Topologi Lab

• Nilai main AS nya digunakan sebagai BGP Identifiernya
• AS 12001 memiliki BGP Confederation peers ke AS 12002
• AS 12002 memiliki BGP Confederation peers ke AS 12001 dan 12003
• AS 12003 memiliki BGP Confederation peers ke AS 12002 dan eBGP 6
• Semua Router R1-R5 dianggap oleh Router R6, semuanya sebagai AS 123

 Konfigurasi R1

!
interface Loopback0
 ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet1/0
 ip address 12.12.12.1 255.255.255.0
 duplex auto
 speed auto
!
interface Serial2/0
 ip address 14.14.14.1 255.255.255.0
 no fair-queue
 serial restart-delay 0
 clock rate 2016000

!
router bgp 12001
 no synchronization
 bgp log-neighbor-changes
 bgp confederation identifier 123
 bgp confederation peers 12002 12003
 network 1.1.1.1 mask 255.255.255.255
 network 12.12.12.0 mask 255.255.255.0
 network 14.14.14.0 mask 255.255.255.0
 neighbor 12.12.12.2 remote-as 12002
 neighbor 14.14.14.4 remote-as 12001
 no auto-summary
!

Konfigurasi R2

!
interface Loopback0
 ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet1/0
 ip address 12.12.12.2 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet1/1
 ip address 23.23.23.2 255.255.255.0
 duplex auto
 speed auto
!
interface Serial2/0
 ip address 25.25.25.2 255.255.255.0
 serial restart-delay 0
 clock rate 2016000
!
router bgp 12002
 no synchronization
 bgp log-neighbor-changes
 bgp confederation identifier 123
 bgp confederation peers 12001 12003
 network 2.2.2.2 mask 255.255.255.255
 network 12.12.12.0 mask 255.255.255.0
 network 23.23.23.0 mask 255.255.255.0
 network 25.25.25.0 mask 255.255.255.0
 neighbor 12.12.12.1 remote-as 12001
 neighbor 23.23.23.3 remote-as 12003
 neighbor 25.25.25.5 remote-as 12002
 no auto-summary
!

Konfigurasi R3

!
interface Loopback0
 ip address 3.3.3.3 255.255.255.255
!
interface FastEthernet1/0
 ip address 23.23.23.3 255.255.255.0
 duplex auto
 speed auto
!
interface Serial2/0
 ip address 36.36.36.3 255.255.255.0
 serial restart-delay 0
 clock rate 2016000
 !
router bgp 12003
 no synchronization
 bgp log-neighbor-changes
 bgp confederation identifier 123
 bgp confederation peers 12001 12002
 network 3.3.3.3 mask 255.255.255.255
 network 23.23.23.0 mask 255.255.255.0
 network 36.36.36.0 mask 255.255.255.0
 neighbor 23.23.23.2 remote-as 12002
 neighbor 36.36.36.6 remote-as 6
 no auto-summary
!

Konfigurasi R4

!
interface Loopback0
 ip address 4.4.4.4 255.255.255.255
 !
interface Serial1/0
 ip address 14.14.14.4 255.255.255.0
 serial restart-delay 0
 clock rate 2016000
 !
router bgp 12001
 no synchronization
 bgp log-neighbor-changes
 bgp confederation identifier 123
 bgp confederation peers 12002 12003
 network 4.4.4.4 mask 255.255.255.255
 network 14.14.14.0 mask 255.255.255.0
 neighbor 14.14.14.1 remote-as 12001
 no auto-summary
!

Konfigurasi R5

!
interface Loopback0
 ip address 5.5.5.5 255.255.255.255
!
interface Serial1/0
 ip address 25.25.25.5 255.255.255.0
 serial restart-delay 0
 clock rate 2016000

!
router bgp 12002
 no synchronization
 bgp log-neighbor-changes
 bgp confederation identifier 123
 bgp confederation peers 12001 12003
 network 5.5.5.5 mask 255.255.255.255
 network 25.25.25.0 mask 255.255.255.0
 neighbor 25.25.25.2 remote-as 12002
 no auto-summary
!

Konfigurasi R6

!
interface Loopback0
 ip address 6.6.6.6 255.255.255.255
!
interface Serial1/0
 ip address 36.36.36.6 255.255.255.0
 serial restart-delay 0
 clock rate 2016000
 !
router bgp 6
 no synchronization
 bgp log-neighbor-changes
 network 6.6.6.6 mask 255.255.255.255
 network 36.36.36.0 mask 255.255.255.0
 neighbor 36.36.36.3 remote-as 123
 no auto-summary
!

Verifikasi Lab

Pastikan IP Loopback0 semua Router dapat diping