Mikrotik | Lab 22. BGP Priate AS Removal

 

AS private tidak boleh muncul di routing table BGP internet, mk harus diremove di AS yg menjembatani antara dia dgn AS internet.

AS65500 = AS private
AS 130    = AS transit
AS 400    = AS internet

Konfigurasi:

R1
system identity set name=IDN-R1
ip address add address=12.12.12.1/24 interface=ether1
ip address add address=31.13.13.1/24 interface=ether2
ip address add address=14.14.14.1/24 interface=ether3

R2
system identity set name=IDN-R2
ip address add address=13.13.13.2/24 interface=ether2
ip address add address=23.23.23.2/24 interface=ether1
ip address add address=34.34.34.2/24 interface=ether3
ip address add address=25.25.25.2/24 interface=ether4

R3
system identity set name=IDN-R3
ip address add address=12.12.12.3/24 interface=ether1
ip address add address=23.23.23.3/24 interface=ether2
interface bridge add name=Lo1
ip address add address=3.3.3.3/32 interface=Lo1

R4
system identity set name=IDN-R4
ip address add address=14.14.14.4/24 interface=ether1
ip address add address=34.34.34.4/24 interface=ether2
interface bridge add name=Lo1
ip address add address=4.4.4.4/32 interface=Lo1

R5
system identity set name=IDN-R5
ip address add address=25.25.25.5/24 interface=ether1
interface bridge add name=Lo1
ip address add address=5.5.5.5/32 interface=Lo1

ROUTING BGP

R1
routing bgp instance set default as=130  
routing bgp peer add name=peer1 remote-address=12.12.12.3 remote-as=65500
routing bgp peer add name=peer2 remote-address=13.13.13.2 remote-as=130 nexthop-choice=force-self
routing bgp peer add name=peer3 remote-address=14.14.14.4 remote-as=400

R2
routing bgp instance set default as=130 
routing bgp peer add name=peer1 remote-address=23.23.23.3 remote-as=65500
routing bgp peer add name=peer4 remote-address=35.35.35.5 remote-as=65500
routing bgp peer add name=peer3 remote-address=13.13.13.1 remote-as=130 nexthop-choice=force-self
routing bgp peer add name=peer3 remote-address=34.34.34.4 remote-as=400

R3
routing bgp instance set default as=65500 redistribute-connected=yes
routing bgp peer add name=peer1 out-filter=med150-out remote-address=12.12.12.1 remote-as=130
routing bgp peer add name=peer2 out-filter=med100-out remote-address=23.23.23.2 remote-as=130

R4
routing bgp instance set default as=400
routing bgp peer add name=peer1 remote-address=14.14.14.1 remote-as=130
routing bgp peer add name=peer2 remote-address=34.34.34.2 remote-as=130
routing bgp network add network=4.4.4.4/32 synchronize=no

R5
routing bgp instance set default as=65500 redistribute-connected=yes
routing bgp peer add name=peer1 out-filter=med150-out remote-address=35.35.35.2 remote-as=130

VERIFIKASI dari R4:

Disana muncul AS number private yt 65500, harusnya AS itu tdk blh muncil di router R4.Maka soulsinya remove private AS yt AS 65500. Berikut langkahnya.

Cek dl nama pering menuju AS 400

Kelihatan peering-nya namanya "peer3"

Tambahkan perintah ini  di R1

[admin@IDN-R1] > routing bgp peer  set peer3 remove-private-as=yes

VERIFKASI

Sukses, bahwa AS 65500 dari gateway 14.14.14.1 sdh kebuang, tinggal yg gateway 34.34.34.2 pada R2. LAKUKAN HAL YG SAMA DI R2 MENHHAPUS PRIAVTE AS PADA PERING MENUJU AS 400. LALU VEIFIKASI. HARUSNYA AS 65500 SDH KEHAPUS.

Suksess...!!

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