Difference between revisions of "VyOS: BGP Sederhana"

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Line 24: Line 24:
 
  IP 10.1.1.0/24
 
  IP 10.1.1.0/24
 
  IP 10.1.2.0/24  
 
  IP 10.1.2.0/24  
 +
 +
 +
==Sambungan==
 +
 +
R1
 +
e1 --> R3 e1
 +
e2 --> R2 e2
 +
e3 --> LAN 10.100.100.0/24
 +
e4 --> LAN 10.100.200.0/24
 +
 +
R2
 +
e1 --> R3 e2
 +
e2 --> R1 e2
 +
e3 --> LAN 10.10.10.0/24
 +
e4 --> LAN 10.10.20.0/24
 +
 +
R3
 +
e1 --> R1 e1
 +
e2 --> R2 e1
 +
e3 --> LAN 10.1.1.0/24
 +
e4 --> LAN 10.1.2.0/24
 +
  
 
==Setup connection==
 
==Setup connection==
Line 106: Line 128:
 
  set protocols bgp 30 parameters router-id ‘192.168.1.2'
 
  set protocols bgp 30 parameters router-id ‘192.168.1.2'
  
−
==Main/Backup link setup==
+
==Test==
−
 
 
−
===ISP3===
 
−
 
 
−
Lakukan
 
−
* accept network kita sendiri
 
−
* drop semua tabel IP lainnya, karena kita tidak mau menjadi transit provider
 
−
* BGP AS prepend - menaikan AS path
 
−
 
 
−
Outgoing filter ke ISP1:
 
−
 
 
−
/routing filter
 
−
#accept our networks
 
−
add chain=isp1-out prefix=10.1.1.0/24 action=accept
 
−
add chain=isp1-out prefix=10.1.2.0/24 action=accept
 
−
#discard the rest
 
−
add chain=isp1-out action=discard
 
−
 
 
−
Outgoing filter ke ISP2:
 
−
 
 
−
/routing filter
 
−
#accept our networks and prepend AS path three times
 
−
add chain=isp2-out prefix=10.1.1.0/24 action=accept set-bgp-prepend=3
 
−
add chain=isp2-out prefix=10.1.2.0/24 action=accept set-bgp-prepend=3
 
−
#discard the rest
 
−
add chain=isp2-out action=discard
 
−
 
 
−
ISP1 menjadi main
 
−
ISP2 menjadi backup
 
−
 
 
−
/routing filter
 
−
add chain=isp1-in action=discard
 
−
add chain=isp2-in action=discard
 
−
 
 
−
/ip route
 
−
add gateway=192.168.1.1 check-gateway=ping
 
−
add gateway=192.168.2.1 distance=30 check-gateway=ping
 
−
 
 
−
 
 
−
==Load sharing setup==
 
−
 
 
−
 
 
−
Teknik melakukan multihoming / download sharing
 
−
 
 
−
[[File:Bgp-multihoming-download-sharing.png|center|400px|thumb]]
 
−
 
 
−
===ISP3===
 
−
 
 
−
Disini salah satu network kita di prepend yang berbeda antara ISP1 dan ISP2
 
−
 
 
−
Outgoing filter ke ISP1:
 
−
 
 
−
/routing filter
 
−
#accept our networks and prepend second network
 
−
add chain=isp1-out prefix=10.1.1.0/24 action=accept
 
−
add chain=isp1-out prefix=10.1.2.0/24 action=accept  set-bgp-prepend=3
 
−
#discard the rest
 
−
add chain=isp1-out action=discard
 
−
 
 
−
Outgoing filter ke ISP2:
 
−
 
 
−
/routing filter
 
−
#accept our networks and prepend first network
 
−
add chain=isp2-out prefix=10.1.1.0/24 action=accept set-bgp-prepend=3
 
−
add chain=isp2-out prefix=10.1.2.0/24 action=accept
 
−
#discard the rest
 
−
add chain=isp2-out action=discard
 
−
 
 
−
Konfigurasi di atas hanya untuk outgoing packet dari network kita. Ada beberapa pilihan,
 
−
 
 
−
* biarkan gateway menggunakan konfigurasi main/backup - ini akan menyebabkan hanya satu link yang digunakan dan routing akan asymetric.
 
−
* gunakan policy routing untuk memaksa outgoing packet menggunakan link yang sama dengan dengan incoming
 
−
* Menggunakan BGP untuk menerima full routing table dari ke dua peer dan menggunakan BGP attribute untuk melakukan routing melalui satu sambungan / link dan sebagian lagi melalui link lainnya. Contoh, traffic local / nasional bisa dikirim menggunakan ISP1 dan Internasional menggunakan ISP2.
 
−
 
  
  

Revision as of 13:57, 16 January 2019

Bgp-multihoming.png


Ada tiga (3) ISP

ISP1: 

IP 192.168.1.1/24 menuju ISP3
IP 192.168.3.1/24 menuju ISP2
AS 10
IP 10.100.100.0/24
IP 10.100.200.0/24

ISP2 

IP 192.168.2.1/24 - menuju ISP3
IP 192.168.3.2/24 - menuju ISP1
AS 20
IP 10.10.10.0/24
IP 10.10.20.0/24

ISP3 (kita) 

IP 192.168.1.2/24 - menuju ISP1
IP 192.168.2.2/24 - menuju ISP2
AS 30
IP 10.1.1.0/24
IP 10.1.2.0/24


Sambungan

R1
e1 --> R3 e1
e2 --> R2 e2 
e3 --> LAN 10.100.100.0/24
e4 --> LAN 10.100.200.0/24

R2
e1 --> R3 e2
e2 --> R1 e2
e3 --> LAN 10.10.10.0/24
e4 --> LAN 10.10.20.0/24

R3
e1 --> R1 e1
e2 --> R2 e1
e3 --> LAN 10.1.1.0/24
e4 --> LAN 10.1.2.0/24


Setup connection

ISP1 

configure
set interfaces ethernet eth1 address '192.168.1.1/24'
set interfaces ethernet eth2 address '192.168.3.1/24'
set interfaces ethernet eth3 address '10.100.100.1/24'
set interfaces ethernet eth4 address '10.100.200.1/24'

show
commit
exit


ISP2 

configure
set interfaces ethernet eth1 address '192.168.2.1/24'
set interfaces ethernet eth2 address '192.168.3.2/24'
set interfaces ethernet eth3 address '10.10.10.1/24'
set interfaces ethernet eth4 address '10.10.20.1/24'

show
commit
exit


ISP3 

configure
set interfaces ethernet eth1 address '192.168.1.2/24'
set interfaces ethernet eth2 address '192.168.2.2/24'
set interfaces ethernet eth3 address '10.1.1.1/24'
set interfaces ethernet eth4 address '10.1.2.1/24'

show
commit
exit

BGP Peering

Consider that IP connectivity between ISPs edge routers and Our Core router is already set up and working properly. So we can start to establish BGP peering to both ISPs.

ISP1 

set protocols bgp 10 neighbor 192.168.1.2 ebgp-multihop '2'
set protocols bgp 10 neighbor 192.168.1.2 remote-as '20'
set protocols bgp 10 neighbor 192.168.1.2 update-source ‘192.168.1.1'
set protocols bgp 10 neighbor 192.168.3.2 ebgp-multihop '2'
set protocols bgp 10 neighbor 192.168.3.2 remote-as '30'
set protocols bgp 10 neighbor 192.168.3.2 update-source ‘192.168.1.1'
set protocols bgp 10 network '10.100.100.0/24'
set protocols bgp 10 network '10.100.200.0/24'
set protocols bgp 10 parameters router-id ‘192.168.1.1'

ISP2 

set protocols bgp 20 neighbor 192.168.3.1 ebgp-multihop '2'
set protocols bgp 20 neighbor 192.168.3.1 remote-as '10'
set protocols bgp 20 neighbor 192.168.3.1 update-source ‘192.168.2.1'
set protocols bgp 20 neighbor 192.168.2.2 ebgp-multihop '2'
set protocols bgp 20 neighbor 192.168.2.2 remote-as '30'
set protocols bgp 20 neighbor 192.168.2.2 update-source ‘192.168.2.1'
set protocols bgp 20 network '10.10.10.0/24'
set protocols bgp 20 network '10.10.20.0/24'
set protocols bgp 20 parameters router-id ‘192.168.2.1'

ISP3 

set protocols bgp 30 neighbor 192.168.1.1 ebgp-multihop '2'
set protocols bgp 30 neighbor 192.168.1.1 remote-as '10'
set protocols bgp 30 neighbor 192.168.1.1 update-source ‘192.168.1.2'
set protocols bgp 30 neighbor 192.168.2.1 ebgp-multihop '2'
set protocols bgp 30 neighbor 192.168.2.1 remote-as '20'
set protocols bgp 30 neighbor 192.168.2.1 update-source ‘192.168.1.2'
set protocols bgp 30 network '10.1.1.0/24'
set protocols bgp 30 network '10.1.2.0/24'
set protocols bgp 30 parameters router-id ‘192.168.1.2'

Test

Referensi


Pranala Menarik


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