Cisco | BGP - Multiple - RR (Router Reflector)

Route reflector dapat melakukan routing update yang diperoleh dari iBGP peer ke iBGP peer yang lain dalam kondisi tertentu. Dengan cara ini, maka kebutuhan untuk topologi full-mesh dapat diatasi dan jaringan dapat diperbesar dengan mudah. Biasanya sebuah cluster hanya memiliki sebuah router RR sj, dalam kebutuhan meningkat redudancy dan pencegahan link down pd jalur single kita bs membuat lebih dari satu RR.

Sekarang kita akan buat lab cara konfigurasi Multiple Router Reflector di BGP. Berikut konfigurasi BGP dan router RR nya dimasing-masing router.

Router RR_1
router ospf 100
router-id 100.100.100.100
network 50.50.50.1 0.0.0.0 area 0
network 51.51.51.1 0.0.0.0 area 0
network 100.100.100.100 0.0.0.0 area 0
network 123.1.1.2 0.0.0.0 area 0
exit

router bgp 123
bgp router-id 100.100.100.100
bgp cluster-id 123
bgp log-neighbor-changes
neighbor iBGP peer-group
neighbor iBGP remote-as 123
neighbor iBGP update-source Loopback0
neighbor 2.2.2.2 peer-group iBGP
neighbor 3.3.3.3 peer-group iBGP
neighbor 4.4.4.4 peer-group iBGP
neighbor 5.5.5.5 peer-group iBGP
neighbor 200.200.200.200 remote-as 123
neighbor 200.200.200.200 update-source Loopback0
!
address-family ipv4
neighbor iBGP route-reflector-client
neighbor 2.2.2.2 activate
neighbor 4.4.4.4 activate
neighbor 200.200.200.200 activate
exit-address-family
exit
--------
Router RR_2
router ospf 100
router-id 200.200.200.200
network 123.0.0.1 0.0.0.0 area 0
network 123.0.1.1 0.0.0.0 area 0
network 123.1.1.1 0.0.0.0 area 0
network 172.16.0.1 0.0.0.0 area 0
network 200.200.200.200 0.0.0.0 area 0
exit
!
router bgp 123
bgp router-id 200.200.200.200
bgp cluster-id 123
bgp log-neighbor-changes
neighbor iBGP peer-group
neighbor iBGP remote-as 123
neighbor iBGP update-source Loopback0
neighbor 2.2.2.2 peer-group iBGP
neighbor 4.4.4.4 peer-group iBGP
neighbor 100.100.100.100 remote-as 123
neighbor 100.100.100.100 update-source Loopback0
!
address-family ipv4
neighbor iBGP route-reflector-client
neighbor 2.2.2.2 activate
neighbor 4.4.4.4 activate
neighbor 100.100.100.100 activate
exit-address-family
exit
-----
Router R2
router ospf 100
router-id 2.2.2.2
network 2.2.2.2 0.0.0.0 area 0
network 50.50.50.2 0.0.0.0 area 0
network 123.0.0.2 0.0.0.0 area 0
!
router bgp 123
bgp router-id 2.2.2.2
bgp log-neighbor-changes
neighbor 12.12.12.4 remote-as 40
neighbor 100.100.100.100 remote-as 123
neighbor 100.100.100.100 update-source Loopback0
neighbor 200.200.200.200 remote-as 123
neighbor 200.200.200.200 update-source Loopback0
!
address-family ipv4
neighbor 12.12.12.4 activate
neighbor 12.12.12.4 remove-private-as
neighbor 100.100.100.100 activate
neighbor 100.100.100.100 next-hop-self
neighbor 200.200.200.200 activate
neighbor 200.200.200.200 next-hop-self
exit-address-family
exit
------------------
Router R4
router ospf 100
router-id 4.4.4.4
network 4.4.4.4 0.0.0.0 area 0
network 51.51.51.4 0.0.0.0 area 0
network 123.0.1.4 0.0.0.0 area 0
!
router bgp 123
bgp router-id 4.4.4.4
bgp log-neighbor-changes
neighbor 20.20.20.1 remote-as 50
neighbor 100.100.100.100 remote-as 123
neighbor 100.100.100.100 update-source Loopback0
neighbor 200.200.200.200 remote-as 123
neighbor 200.200.200.200 update-source Loopback0
!
address-family ipv4
neighbor 20.20.20.1 activate
neighbor 20.20.20.1 remove-private-as
neighbor 100.100.100.100 activate
neighbor 100.100.100.100 next-hop-self
neighbor 200.200.200.200 activate
neighbor 200.200.200.200 next-hop-self
exit-address-family
exit
Verifikasi