Difference between revisions of "Cisco: BGP Sederhana tanpa filter"

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Line 51: Line 51:
 
  enable
 
  enable
 
  configure terminal
 
  configure terminal
−
   interface Ethernet1/0
+
   interface Ethernet 1/0
 
     ip address 192.168.1.1 255.255.255.0
 
     ip address 192.168.1.1 255.255.255.0
 
     no shutdown
 
     no shutdown
 
     exit
 
     exit
−
   interface Ethernet1/1
+
   interface Ethernet 1/1
 
     ip address 192.168.3.1 255.255.255.0
 
     ip address 192.168.3.1 255.255.255.0
 
     no shutdown
 
     no shutdown
 
     exit
 
     exit
−
   interface Ethernet1/2
+
   interface Ethernet 1/2
 
     ip address 10.100.100.1 255.255.255.0
 
     ip address 10.100.100.1 255.255.255.0
 
     no shutdown
 
     no shutdown
 
     exit
 
     exit
−
   interface Ethernet1/3
+
   interface Ethernet 1/3
 
     ip address 10.100.200.1 255.255.255.0
 
     ip address 10.100.200.1 255.255.255.0
 
     no shutdown
 
     no shutdown
Line 107: Line 107:
 
     no shutdown
 
     no shutdown
 
     exit
 
     exit
−
   interface Ethernet1/2
+
   interface Ethernet1/3
 
     ip address 10.1.2.1 255.255.255.0
 
     ip address 10.1.2.1 255.255.255.0
 
     no shutdown
 
     no shutdown
Line 124: Line 124:
 
   router bgp 10
 
   router bgp 10
 
   bgp router-id 192.168.1.1
 
   bgp router-id 192.168.1.1
−
     address-family ipv4 unicast  
+
     ! address-family ipv4 unicast  
−
     network 10.100.100.0
+
     network 10.100.100.0 mask 255.255.255.0
−
     network 10.100.200.0
+
     network 10.100.200.0 mask 255.255.255.0
 
     neighbor 192.168.3.2 remote-as 20
 
     neighbor 192.168.3.2 remote-as 20
 
     neighbor 192.168.1.2 remote-as 30
 
     neighbor 192.168.1.2 remote-as 30
 +
    neighbor 192.168.3.2 activate
 +
    neighbor 192.168.1.2 activate
 
     ! neighbor 192.168.3.2 default-originate  
 
     ! neighbor 192.168.3.2 default-originate  
 
     ! neighbor 192.168.1.2 default-originate
 
     ! neighbor 192.168.1.2 default-originate
 
   end
 
   end
−
 
−
#set our AS number
 
−
/routing bgp instance set default as=10
 
−
#add BGP peers
 
−
/routing bgp peer
 
−
add name=toISP2 remote-address=192.168.3.2 remote-as=20
 
−
add name=toISP3 remote-address=192.168.1.2 remote-as=30
 
−
# jika ingin redistribute default route ke client yang spesifik
 
−
# add name=toISP2 remote-address=192.168.3.2 remote-as=20 default-originate=if-installed
 
−
# add name=toISP3 remote-address=192.168.1.2 remote-as=30 default-originate=if-installed
 
  
 
ISP2:
 
ISP2:
Line 150: Line 142:
 
   router bgp 20
 
   router bgp 20
 
   bgp router-id 192.168.2.1
 
   bgp router-id 192.168.2.1
−
     address-family ipv4 unicast
+
     ! address-family ipv4 unicast
−
     network 10.10.10.0
+
     network 10.10.10.0 mask 255.255.255.0
−
     network 10.10.20.0
+
     network 10.10.20.0 mask 255.255.255.0
 
     neighbor 192.168.3.1 remote-as 10
 
     neighbor 192.168.3.1 remote-as 10
 
     neighbor 192.168.2.2 remote-as 30
 
     neighbor 192.168.2.2 remote-as 30
 +
    neighbor 192.168.3.1 activate
 +
    neighbor 192.168.2.2 activate
 
   end
 
   end
  
Line 163: Line 157:
 
   router bgp 30
 
   router bgp 30
 
   bgp router-id 192.168.1.2
 
   bgp router-id 192.168.1.2
−
     address-family ipv4 unicast
+
     ! address-family ipv4 unicast
−
     network 10.1.1.0
+
     network 10.1.1.0 mask 255.255.255.0
−
     network 10.1.2.0
+
     network 10.1.2.0 mask 255.255.255.0
 
     neighbor 192.168.1.1 remote-as 10
 
     neighbor 192.168.1.1 remote-as 10
 
     neighbor 192.168.2.1 remote-as 20
 
     neighbor 192.168.2.1 remote-as 20
 +
    neighbor 192.168.1.1 activate
 +
    neighbor 192.168.2.1 activate 
 
   end
 
   end
−
 
−
 
−
#set our AS number
 
−
/routing bgp instance set default as=30
 
−
#add BGP peers
 
−
/routing bgp peer
 
−
add name=toISP1 remote-address=192.168.1.1 remote-as=10
 
−
add name=toISP2 remote-address=192.168.2.1 remote-as=20
 
−
 
−
==Network Advertisements and Routing Filters==
 
−
 
−
Now we can start to advertise our networks and filter out all other unnecessary advertisements.
 
−
 
−
ISP1:
 
−
 
−
/routing bgp network
 
−
add network=10.100.100.0/24 synchronize=no
 
−
add network=10.100.200.0/24 synchronize=no
 
−
 
−
 
−
ISP2:
 
−
 
−
/routing bgp network
 
−
add network=10.10.10.0/24 synchronize=no
 
−
add network=10.10.20.0/24 synchronize=no
 
−
 
−
ISP3:
 
−
 
−
First step is to advertise our networks
 
−
 
−
/routing bgp network
 
−
add network=10.1.1.0/24 synchronize=no
 
−
add network=10.1.2.0/24 synchronize=no
 
−
 
−
 
−
Cek routing
 
−
 
−
/ip route print
 
−
 
−
 
−
Next step is to specify which routing filter chains will be used
 
−
 
−
/routing bgp peer
 
−
set isp1 in-filter=isp1-in out-filter=isp1-out
 
−
set isp2 in-filter=isp2-in out-filter=isp2-out
 
−
 
−
in-filter is for incoming (received) prefixes, out-filter is for advertised prefixes.
 
−
 
−
 
−
 
  
 
==Cek==
 
==Cek==
  
 
  show ip route
 
  show ip route
 +
show ip bgp 10.100.1000.0/24
 
  show ip bgp neighbors 192.168.2.2 advertised-routes
 
  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 neighbors  
 
  show bgp ipv4 unicast summary
 
  show bgp ipv4 unicast summary
−
 
−
==Main/Backup link setup==
 
−
 
−
===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
 
−
* Menggnakan 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.
 
−
 
−
 
  
 
==Referensi==
 
==Referensi==
Line 310: Line 182:
 
==Pranala Menarik==
 
==Pranala Menarik==
  
 +
* [[TCP/IP: Advanced Routing]]
 
* [[Quagga]]
 
* [[Quagga]]
 
* [[Mikrotik]]
 
* [[Mikrotik]]
 
* [[Cisco]]
 
* [[Cisco]]
 
* [[Juniper]]
 
* [[Juniper]]
 +
* [[BIRD: Routing]]
 +
* [[IPv6]]
 +
 +
 +
* [[TCP/IP: Advanced Routing]]
 +
* [[IPv6: Advanced Routing]]
 +
* [[IPv6: Quagga]]
 +
* [[IPv6: Mikrotik]]
 +
* [[IPv6: Cisco]]
 +
* [[IPv6: Juniper]]
 +
* [[IPv6: BIRD: Routing]]
 +
* [[IPv6]]

Latest revision as of 14:48, 3 July 2020

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 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 Ethernet 1/0
    ip address 192.168.1.1 255.255.255.0
    no shutdown
    exit
  interface Ethernet 1/1
    ip address 192.168.3.1 255.255.255.0
    no shutdown
    exit
  interface Ethernet 1/2
    ip address 10.100.100.1 255.255.255.0
    no shutdown
    exit
  interface Ethernet 1/3
    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
    ! 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 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
    ! 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 activate 
    neighbor 192.168.2.2 activate 
  end

ISP3: 

enable
configure terminal
  router bgp 30
  bgp router-id 192.168.1.2
    ! 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 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

Pranala Menarik


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