Lab 12. BGP Agregation

Assalamu'alaikum Warohmatullahi Wabarokatuh...
baik sahabat configer kali ini saya akan sedikit sharing mengenai BGP Agregation untuk topologinya seperti ini :

oke kita langsung saja ke konfigurasinya :
Konfigurasi R1

[admin@MikroTik] > sys id set nam R1
[admin@R1] > int br ad nam bridge1
[admin@R1] > ip ad ad ad 192.168.0.1/24 interface=bridge1
[admin@R1] > ip ad ad ad 12.12.12.1/24 interface=ether1
[admin@R1] > routing bgp instance set default as=123
[admin@R1] > routing bgp peer add name=peer1 remote-address=12.12.12.2 remote-as=123
[admin@R1] > routing bgp network add network=192.168.0.0/24

Konfigurasi R2

[admin@MikroTik] > sys id set nam R2
[admin@R2] > ip ad ad ad 12.12.12.2/24 interface=ether1
[admin@R2] > ip ad ad ad 23.23.23.2/24 interface=ether2
[admin@R2] > ip ad ad ad 24.24.24.2/24 interface=ether3        
[admin@R2] > routing bgp instance set default as=123 redistribute-connected=yes
[admin@R2] > routing bgp peer add name=peer1 remote-address=12.12.12.1 remote-as=123
[admin@R2] > routing bgp peer add name=peer2 remote-address=23.23.23.3 remote-as=123    
[admin@R2] > routing bgp peer add name=peer3 remote-address=24.24.24.4 remote-as=400

Konfigurasi R3

[admin@MikroTik] > sys id set nam R3
[admin@R3] > interface bridge ad nam bridge1
[admin@R3] > ip ad ad ad 23.23.23.3/24 interface=ether1
[admin@R3] > ip ad ad ad 192.168.1.1/24 interface=bridge1
[admin@R3] > routing bgp instance set default as=123
[admin@R3] > routing bgp network add network=192.168.1.0/24
[admin@R3] > routing bgp peer add name=peer1 remote-address=23.23.23.2 remote-as=123

Konfigurasi R4

[admin@MikroTik] > sys id set nam R4
[admin@R4] > ip ad ad ad 24.24.24.4/24 interface=ether1  
[admin@R4] > routing bgp instance set default as=400
[admin@R4] > routing bgp peer add name=peer1 remote-address=24.24.24.2 remote-as=123

sekarang kita cek ip routing fi R4

[admin@R4] > ip route print 
Flags: X - disabled, A - active, D - dynamic, C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme, B - blackhole, U - unreachable, P - prohibit 
 #      DST-ADDRESS        PREF-SRC        GATEWAY            DISTANCE
 0 ADb  12.12.12.0/24                      24.24.24.2               20
 1 ADb  23.23.23.0/24                      24.24.24.2               20
 2 ADC  24.24.24.0/24      24.24.24.4      ether1                    0
 3  Db  24.24.24.0/24                      24.24.24.2               20
 4 ADb  192.168.0.0/24                     24.24.24.2               20
 5 ADb  192.168.1.0/24                     24.24.24.2               20

sekarang kita akan konfigurasi routing agregate di R2 karena bisa kita lihat R2 mengadvertise 2 network (/24):

[admin@R2] > routing bgp aggregate add prefix=192.168.0.0/23 instance=default 

dan cek kembali table routing R4 dan lihat apa yang terjadi :

[admin@R4] > ip route print 
Flags: X - disabled, A - active, D - dynamic, C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme, B - blackhole, U - unreachable, P - prohibit 
 #      DST-ADDRESS        PREF-SRC        GATEWAY            DISTANCE
 0 ADb  12.12.12.0/24                      24.24.24.2               20
 1 ADb  23.23.23.0/24                      24.24.24.2               20
 2 ADC  24.24.24.0/24      24.24.24.4      ether1                    0
 3  Db  24.24.24.0/24                      24.24.24.2               20
 4 ADb  192.168.0.0/23                     24.24.24.2               20

bisa kita lihat diatas R2 sudah tidak mengadvertise dua network (/24) lagi melainkan mengadvertise net (/23)/. Alhamdulillah postingan kali ini telah selesai, jika artikel ini terasa bermanfaat silahkan bisa di share dengan menekan salah satu button dibawah ini.

Wassalamu'alaikum ...

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