View source for Cisco: BGP Sederhana - dengan MD5 Authentication

[[File:Bgp-multihoming.png|center|900px|thumb]]

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 Fisik==

ISP1
 

 ISP1 Eth1/0 -> ISP3 Eth1/0
 ISP1 Eth1/1 -> ISP2 Eth1/1
 ISP2 Eth1/0 -> ISP3 Eth1/1
 
 ISP1 Eth1/2 10.100.100.1/24
 ISP1 Eth1/3 10.100.200.1/24
 
 ISP2 Eth1/2 10.10.10.1/24
 ISP2 Eth1/3 10.10.20.1/24
 
 ISP3 Eth1/2 10.1.1.1/24
 ISP3 Eth1/3 10.1.2.1/24



==Setup connection==

ISP1

 enable
 configure terminal
   interface Ethernet1/0
     ip address 192.168.1.1 255.255.255.0
     no shutdown
     exit
   interface Ethernet1/1
     ip address 192.168.3.1 255.255.255.0
     no shutdown
     exit
   interface Ethernet1/2
     ip address 10.100.100.1 255.255.255.0
     no shutdown
     exit
   interface Ethernet1/3
     ip address 10.100.200.1 255.255.255.0
     no shutdown
     exit
  end

ISP2

 enable
 configure terminal
   interface Ethernet1/0
     ip address 192.168.2.1 255.255.255.0
     no shutdown
     exit
   interface Ethernet1/1
     ip address 192.168.3.2 255.255.255.0
     no shutdown
     exit
   interface Ethernet1/2
     ip address 10.10.10.1 255.255.255.0
     no shutdown
     exit
   interface Ethernet1/3
     ip address 10.10.20.1 255.255.255.0
     no shutdown
     exit
  end

ISP3

 enable
 configure terminal
   interface Ethernet1/0
     ip address 192.168.1.2 255.255.255.0
     no shutdown
     exit
   interface Ethernet1/1
     ip address 192.168.2.2 255.255.255.0
     no shutdown
     exit
   interface Ethernet1/2
     ip address 10.1.1.1 255.255.255.0
     no shutdown
     exit
   interface Ethernet1/3
     ip address 10.1.2.1 255.255.255.0
     no shutdown
     exit
  end

==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:

 enable
 configure terminal
   router bgp 10
   bgp router-id 192.168.1.1
     no synchronization
     bgp log-neighbor-changes
     ! address-family ipv4 unicast 
     network 10.100.100.0 mask 255.255.255.0
     network 10.100.200.0 mask 255.255.255.0
     neighbor 192.168.3.2 remote-as 20
     neighbor 192.168.1.2 remote-as 30
     neighbor 192.168.3.2 password $AP7i1
     neighbor 192.168.1.2 password $AP7i1
     neighbor 192.168.3.2 activate 
     neighbor 192.168.1.2 activate 
     ! neighbor 192.168.3.2 default-originate 
     ! neighbor 192.168.1.2 default-originate
   end

ISP2:


 enable
 configure terminal
   router bgp 20
   bgp router-id 192.168.2.1
     no synchronization
     bgp log-neighbor-changes
     ! address-family ipv4 unicast
     network 10.10.10.0 mask 255.255.255.0
     network 10.10.20.0 mask 255.255.255.0
     neighbor 192.168.3.1 remote-as 10
     neighbor 192.168.2.2 remote-as 30
     neighbor 192.168.3.1 password $AP7i1
     neighbor 192.168.2.2 password $AP7i1
     neighbor 192.168.3.1 activate 
     neighbor 192.168.2.2 activate 
   end

ISP3:

 enable
 configure terminal
   router bgp 30
   bgp router-id 192.168.1.2
     no synchronization
     bgp log-neighbor-changes
     ! address-family ipv4 unicast
     network 10.1.1.0 mask 255.255.255.0
     network 10.1.2.0 mask 255.255.255.0
     neighbor 192.168.1.1 remote-as 10
     neighbor 192.168.2.1 remote-as 20
     neighbor 192.168.1.1 password $AP7i1
     neighbor 192.168.2.1 password $AP7i1
     neighbor 192.168.1.1 activate
     neighbor 192.168.2.1 activate  
   end

==Cek==

 show ip route
 show ip bgp 10.100.1000.0/24
 show ip bgp neighbors 192.168.2.2 advertised-routes
 show ip bgp neighbor 192.168.1.1 routes
 show bgp ipv4 unicast neighbors 
 show bgp ipv4 unicast summary

==Referensi==

* https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-16/irg-xe-16-book/configuring-a-basic-bgp-network.html
* https://wiki.mikrotik.com/wiki/Manual:Simple_BGP_Multihoming

==Pranala Menarik==

* [[TCP/IP: Advanced Routing]]
* [[Quagga]]
* [[Mikrotik]]
* [[Cisco]]
* [[Juniper]]
* [[BIRD: Routing]]
* [[IPv6]]