Konfigurasi AS-SET Aggregate Routing BGP
Mekanisme aggregasi adalah suatu cara mengumpulkan beberapa rute menjadi rute yang lebih kecil dan lebih umum diteruskan kepada jalur dituju. Aggregasi akan mengurangi beban rute dalam tabel routing suatu router yang menampung dan menyimpan rute-rute dari peer dan neighbor. AS-SET salah satu tipe attribute AS-PATH dipergunakan untuk update prefix tiap-tiap AS dalam topologi jaringan BGP. AS-SET akan mengumpulkan jalur-jalur yang dilalui oleh AS untuk mencapai AS lainnya.
Konfigurasi ini akan memberikan sedikit pemahaman tentang aggregate, AS-SET, jaringan BGP. Dibawah ini topologi jaringan BGP yang saya gunakan …
#Router1
interface Loopback0 ip address 1.1.1.1 255.255.255.255 ! interface FastEthernet0/0 ip address 20.20.20.1 255.255.255.252 duplex auto speed auto ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! router bgp 400 no synchronization bgp log-neighbor-changes network 1.1.1.1 mask 255.255.255.255 neighbor 20.20.20.2 remote-as 300 no auto-summary !
#Router2
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet0/0
ip address 20.20.20.2 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 30.30.30.1 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet1/0
ip address 40.40.40.1 255.255.255.252
shutdown
duplex auto
speed auto
!
router bgp 300
no synchronization
bgp log-neighbor-changes
network 2.2.2.2 mask 255.255.255.255
aggregate-address 192.150.0.0 255.255.0.0 as-set summary-only
neighbor 20.20.20.1 remote-as 400
neighbor 30.30.30.2 remote-as 100
no auto-summary
!
#Router3
interface Loopback0 ip address 3.3.3.3 255.255.255.255 ! interface FastEthernet0/0 ip address 30.30.30.2 255.255.255.252 duplex auto speed auto ! interface FastEthernet0/1 ip address 50.50.50.1 255.255.255.252 duplex auto speed auto ! router bgp 100 no synchronization bgp log-neighbor-changes network 3.3.3.3 mask 255.255.255.255 neighbor 30.30.30.1 remote-as 300 neighbor 50.50.50.2 remote-as 10 no auto-summary ! #Router4 interface Loopback0 ip address 4.4.4.4 255.255.255.255 ! interface FastEthernet0/0 ip address 40.40.40.2 255.255.255.252 duplex auto speed auto ! interface FastEthernet0/1 ip address 60.60.60.1 255.255.255.252 duplex auto speed auto ! router bgp 200 no synchronization bgp log-neighbor-changes network 4.4.4.4 mask 255.255.255.255 neighbor 40.40.40.1 remote-as 300 neighbor 60.60.60.2 remote-as 20 no auto-summary ! #Router5 interface Loopback0 ip address 5.5.5.5 255.255.255.255 ! interface Loopback1 ip address 192.150.1.1 255.255.255.0 ! interface Loopback2 ip address 192.150.2.1 255.255.255.0 ! interface Loopback3 ip address 192.150.3.1 255.255.255.0 ! interface Loopback4 ip address 192.150.4.1 255.255.255.0 ! interface Loopback5 ip address 192.150.5.1 255.255.255.0 ! interface FastEthernet0/0 ip address 50.50.50.2 255.255.255.252 duplex auto speed auto ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! router bgp 10 no synchronization bgp log-neighbor-changes network 5.5.5.5 mask 255.255.255.255 network 192.150.1.0 network 192.150.2.0 network 192.150.3.0 network 192.150.4.0 network 192.150.5.0 neighbor 50.50.50.1 remote-as 100 no auto-summary ! #Router6 interface Loopback0 ip address 6.6.6.6 255.255.255.255 ! interface Loopback6 ip address 192.150.6.1 255.255.255.0 ! interface Loopback7 ip address 192.150.7.1 255.255.255.0 ! interface FastEthernet0/0 ip address 60.60.60.2 255.255.255.252 duplex auto speed auto ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! router bgp 20 no synchronization bgp log-neighbor-changes network 6.6.6.6 mask 255.255.255.255 network 192.150.6.0 network 192.150.7.0 neighbor 60.60.60.1 remote-as 200 no auto-summary !
Periksa hasil konfigurasi, pergunakan perintah show ip bgp
#Router2
#Router1
Proses diatas perlu diterapkan untuk topologi jaringan dengan rute yang kompleks seperti ISP. Untuk itu dibutuhkan pemahaman terhadap rute-rute jaringan yang tersimpan dalam tabel routing suatu router.
