VyOS: BGP Sederhana

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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 interface loopback lo address 1.1.1.1/32
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 interface loopback lo address 1.1.1.1/32
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 interface loopback lo address 1.1.1.1/32
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 parameters router-id 192.168.3.1
set protocols bgp 10 network 10.100.100.0/24
set protocols bgp 10 network 10.100.200.0/24
# set protocols bgp 10 neighbor 192.168.1.2 ebgp-multihop 2
set protocols bgp 10 neighbor 192.168.1.2 update-source 192.168.3.1
set protocols bgp 10 neighbor 192.168.1.2 remote-as 20
# set protocols bgp 10 neighbor 192.168.3.2 ebgp-multihop 2
set protocols bgp 10 neighbor 192.168.3.2 update-source 192.168.3.1
set protocols bgp 10 neighbor 192.168.3.2 remote-as 30

show
commit
exit

ISP2 

set protocols bgp 20 parameters router-id 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 neighbor 192.168.3.1 ebgp-multihop 2
set protocols bgp 20 neighbor 192.168.3.1 update-source 192.168.2.1
set protocols bgp 20 neighbor 192.168.3.1 remote-as 10
# set protocols bgp 20 neighbor 192.168.2.2 ebgp-multihop 2
set protocols bgp 20 neighbor 192.168.2.2 update-source 192.168.2.1
set protocols bgp 20 neighbor 192.168.2.2 remote-as 30

show
commit
exit

ISP3 

set protocols bgp 30 parameters router-id 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 neighbor 192.168.1.1 ebgp-multihop 2
set protocols bgp 30 neighbor 192.168.1.1 update-source 192.168.1.2
set protocols bgp 30 neighbor 192.168.1.1 remote-as 10
# set protocols bgp 30 neighbor 192.168.2.1 ebgp-multihop 2
set protocols bgp 30 neighbor 192.168.2.1 update-source 192.168.1.2
set protocols bgp 30 neighbor 192.168.2.1 remote-as 20

show
commit
exit

Test

show interfaces
show ip bgp scan 
show ip bgp summary
show ip bgp rsclient summary 
show ip bgp neighbors 192.168.1.2 
show ip route
show


Referensi


Pranala Menarik


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