Dalam BGP tiap routernya harus terhubung secara full mesh untuk dapat saling berkomunikasi, hal ini dapat merepotkan apabila banyak router yang terhubung.  Kita bisa menghubungkan peers dari router – router tersebut kedalam suatu group, sehingga option update-source loopback, remote-as, route-reflector-client, dll tidak perlu diketik berulang – ulang.

Topologinya seperti di bawah ini.

topologi

 

Petunjuk lab :

1. Melanjutkan topologi dari postingan sebelumnya.

2. Hapus konfigurasi BGP 12 gantikan dengan BGP 111.

3. Konfigurasikan peers groupnya

 

Setelah router di config, hasil show run nya sebagai berikut.

R1

interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface Loopback1
ip address 11.11.11.11 255.255.255.255
!
interface Serial0/0
ip address 12.12.12.1 255.255.255.0
clock rate 2000000
!
router eigrp 111
auto-summary
!
router eigrp 1
network 1.1.1.1 0.0.0.0
network 12.12.12.0 0.0.0.255
auto-summary
!
router bgp 111
no synchronization
bgp log-neighbor-changes
network 11.11.11.11 mask 255.255.255.255
network 12.12.12.0 mask 255.255.255.0
neighbor INTERNAL peer-group
neighbor INTERNAL remote-as 111
neighbor INTERNAL update-source Loopback0
neighbor 2.2.2.2 peer-group INTERNAL
neighbor 3.3.3.3 peer-group INTERNAL
no auto-summary

 

R2

interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface Loopback1
ip address 22.22.22.22 255.255.255.255
!
interface FastEthernet0/0
ip address 24.24.24.2 255.255.255.0
duplex auto
speed auto
!
interface Serial0/0
ip address 12.12.12.2 255.255.255.0
clock rate 2000000
!
interface Serial0/1
ip address 23.23.23.2 255.255.255.0
clock rate 2000000
!
router eigrp 1
network 2.2.2.2 0.0.0.0
network 12.12.12.2 0.0.0.0
network 23.23.23.2 0.0.0.0
auto-summary
!
router bgp 111
no synchronization
bgp log-neighbor-changes
network 12.12.12.0 mask 255.255.255.0
network 22.22.22.22 mask 255.255.255.255
network 23.23.23.0 mask 255.255.255.0
network 24.24.24.0 mask 255.255.255.0
neighbor INTERNAL peer-group
neighbor INTERNAL remote-as 111
neighbor INTERNAL update-source Loopback0
neighbor INTERNAL next-hop-self
neighbor 1.1.1.1 peer-group INTERNAL
neighbor 3.3.3.3 peer-group INTERNAL
neighbor 24.24.24.4 remote-as 44
no auto-summary

 

R3

interface Loopback0
ip address 3.3.3.3 255.255.255.0
!
interface Loopback1
ip address 33.33.33.33 255.255.255.255
!
interface Serial0/0
ip address 23.23.23.3 255.255.255.0
clock rate 2000000
!
router eigrp 1
network 3.3.3.3 0.0.0.0
network 23.23.23.3 0.0.0.0
auto-summary
!
router bgp 111
no synchronization
bgp log-neighbor-changes
network 23.23.23.0 mask 255.255.255.0
network 33.33.33.33 mask 255.255.255.255
neighbor INTERNAL peer-group
neighbor INTERNAL remote-as 111
neighbor INTERNAL update-source Loopback0
neighbor 1.1.1.1 peer-group INTERNAL
neighbor 2.2.2.2 peer-group INTERNAL
no auto-summary

 

R4

interface Loopback0
ip address 4.4.4.4 255.255.255.255
!
interface Loopback1
ip address 44.44.44.44 255.255.255.255
!
interface FastEthernet0/0
ip address 24.24.24.4 255.255.255.0
duplex auto
speed auto
!
router bgp 44
no synchronization
bgp log-neighbor-changes
network 4.4.4.4 mask 255.255.255.255
network 24.24.24.0 mask 255.255.255.0
network 44.44.44.44 mask 255.255.255.255
neighbor 24.24.24.2 remote-as 111
no auto-summary

 

verifikasi

ping r4

r1

r2

r3

r4