Difference between revisions of "Mikrotik: BGP Dua Link main backup - dengan as-path PREPEND dan MD5 Authentication"

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(Created page with "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 10.100.20...")
 
Line 30: Line 30:
 
   
 
   
  
−
  ISP1 Eth1/0 -> ISP3 Eth1/0
+
  ISP1 ether0 -> ISP3 ether0
−
  ISP1 Eth1/1 -> ISP2 Eth1/1
+
  ISP1 ether1 -> ISP2 ether1
−
  ISP2 Eth1/0 -> ISP3 Eth1/1
+
  ISP2 ether0 -> ISP3 ether1
 
   
 
   
−
  ISP1 Eth1/2 10.100.100.1/24
+
  ISP1 ether2 10.100.100.1/24
−
  ISP1 Eth1/3 10.100.200.1/24
+
  ISP1 ether3 10.100.200.1/24
 
   
 
   
−
  ISP2 Eth1/2 10.10.10.1/24
+
  ISP2 ether2 10.10.10.1/24
−
  ISP2 Eth1/3 10.10.20.1/24
+
  ISP2 ether3 10.10.20.1/24
 
   
 
   
−
  ISP3 Eth1/2 10.1.1.1/24
+
  ISP3 ether2 10.1.1.1/24
−
  ISP3 Eth1/3 10.1.2.1/24
+
  ISP3 ether3 10.1.2.1/24
  
  
Line 49: Line 49:
 
ISP1
 
ISP1
  
−
  enable
+
  /ip address add interface=ether1 address=192.168.1.1/24
−
configure terminal
+
/ip address add interface=ether2 address=192.168.3.1/24
−
  interface Ethernet1/0
+
/ip address add interface=ether3 address=10.100.100.1/24
−
    ip address 192.168.1.1 255.255.255.0
+
/ip address add interface=ether3 address=10.100.200.1/24
−
    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
 
ISP2
  
−
  enable
+
  /ip address add interface=ether1 address=192.168.2.1/24
−
configure terminal
+
/ip address add interface=ether2 address=192.168.3.2/24
−
  interface Ethernet1/0
+
/ip address add interface=ether3 address=10.10.10.1/24
−
    ip address 192.168.2.1 255.255.255.0
+
/ip address add interface=ether4 address=10.10.20.1/24
−
    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
 
ISP3
  
−
  enable
+
  /ip address add interface=ether1 address=192.168.1.2/24
−
configure terminal
+
/ip address add interface=ether2 address=192.168.2.2/24
−
  interface Ethernet1/0
+
/ip address add interface=ether3 address=10.1.1.1/24
−
    ip address 192.168.1.2 255.255.255.0
+
/ip address add interface=ether4 address=10.1.2.1/24
−
    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==
 
==BGP Peering==
Line 120: Line 75:
 
ISP1:
 
ISP1:
  
−
  enable
+
  #set our AS number
−
  configure terminal
+
  /routing bgp instance set default as=10
−
  router bgp 10
+
#add BGP peers
−
  bgp router-id 192.168.1.1
+
/routing bgp peer
−
    no synchronization
+
add name=toISP2 remote-address=192.168.3.2 remote-as=20
−
    bgp log-neighbor-changes
+
add name=toISP3 remote-address=192.168.1.2 remote-as=30
−
    ! address-family ipv4 unicast
+
# jika ingin redistribute default route ke client yang spesifik
−
    network 10.100.100.0 mask 255.255.255.0
+
# add name=toISP2 remote-address=192.168.3.2 remote-as=20 default-originate=if-installed
−
    network 10.100.200.0 mask 255.255.255.0
+
# add name=toISP3 remote-address=192.168.1.2 remote-as=30 default-originate=if-installed
−
    neighbor 192.168.3.2 remote-as 20
+
#
−
    neighbor 192.168.1.2 remote-as 30
+
# advertize routing
−
    neighbor 192.168.3.2 password $AP7i1
+
#
−
    neighbor 192.168.1.2 password $AP7i1
+
/routing bgp network
−
    neighbor 192.168.3.2 activate
+
add network=10.100.100.0/24 synchronize=no
−
    neighbor 192.168.1.2 activate
+
add network=10.100.200.0/24 synchronize=no
−
    ! neighbor 192.168.3.2 default-originate
 
−
    ! neighbor 192.168.1.2 default-originate
 
−
  end
 
  
 
ISP2:
 
ISP2:
  
 +
#set our AS number
 +
/routing bgp instance set default as=20
 +
#add BGP peers
 +
/routing bgp peer
 +
add name=toISP1 remote-address=192.168.3.1 remote-as=10
 +
add name=toISP3 remote-address=192.168.2.2 remote-as=30
 +
#
 +
# advertize routing
 +
#
 +
/routing bgp network
 +
add network=10.10.10.0/24 synchronize=no
 +
add network=10.10.20.0/24 synchronize=no
  
−
  enable
+
ISP3:
−
  configure terminal
+
 
−
  router bgp 20
+
  #set our AS number
−
  bgp router-id 192.168.2.1
+
  /routing bgp instance set default as=30
−
    no synchronization
+
#add BGP peers
−
    bgp log-neighbor-changes
+
/routing bgp peer
−
    ! address-family ipv4 unicast
+
add name=toISP1 remote-address=192.168.1.1 remote-as=10
−
    network 10.10.10.0 mask 255.255.255.0
+
add name=toISP2 remote-address=192.168.2.1 remote-as=20
−
    network 10.10.20.0 mask 255.255.255.0
+
#
−
    neighbor 192.168.3.1 remote-as 10
+
# advertize routing
−
    neighbor 192.168.2.2 remote-as 30
+
#
−
    neighbor 192.168.3.1 password $AP7i1
+
/routing bgp network
−
    neighbor 192.168.2.2 password $AP7i1
+
add network=10.1.1.0/24 synchronize=no
−
    neighbor 192.168.3.1 activate
+
add network=10.1.2.0/24 synchronize=no
−
    neighbor 192.168.2.2 activate
+
 
−
  end
+
==Main/Backup link setup==
  
−
==Main / Backup Link Setup di ISP3==
+
===ISP3===
  
 
Lakukan
 
Lakukan
 
* accept network kita sendiri
 
* accept network kita sendiri
 
* drop semua tabel IP lainnya, karena kita tidak mau menjadi transit provider
 
* drop semua tabel IP lainnya, karena kita tidak mau menjadi transit provider
−
* BGP AS prepend - menaikan AS path ke salah satu ISP (disini ISP1)
+
* BGP AS prepend - menaikan AS path
−
 
 
−
 
 
−
ISP3:
 
  
−
  enable
+
  # setup routing filter
−
  configure terminal
+
  #
−
  router bgp 30
+
/routing bgp peer
−
  bgp router-id 192.168.1.2
+
set toISP1 in-filter=isp1-in out-filter=isp1-out
−
    no synchronization
+
set toISP2 in-filter=isp2-in out-filter=isp2-out
−
    bgp log-neighbor-changes
+
#
−
    ! address-family ipv4 unicast
+
# Outgoing filter ke ISP1:
−
    network 10.1.1.0 mask 255.255.255.0
+
#
−
    network 10.1.2.0 mask 255.255.255.0
+
/routing filter
−
    neighbor 192.168.1.1 remote-as 10
+
#accept our networks
−
    neighbor 198.168.1.1 route-map PREPEND out
+
add chain=isp1-out prefix=10.1.1.0/24 action=accept
−
    neighbor 192.168.2.1 remote-as 20
+
add chain=isp1-out prefix=10.1.2.0/24 action=accept
−
    neighbor 192.168.1.1 password $AP7i1
+
#discard the rest
−
    neighbor 192.168.2.1 password $AP7i1
+
add chain=isp1-out action=discard
−
    neighbor 192.168.1.1 activate
+
#
−
    neighbor 192.168.2.1 activate
+
# Outgoing filter ke ISP2:
−
    route-map PREPEND permit 10
+
#
−
    set as-path prepend 30 30 30 30 30
+
/routing filter
−
  end
+
#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
  
 
==Cek==
 
==Cek==
  
−
  ! perhatikan AS 30 di tambahkan 5x ke routing ke arah AS 10
+
  /routing filter print
−
  !
+
  /routing bgp instance print
−
show ip bgp
+
  /routing bgp peer print status
−
 
+
  /routing bgp peer print
−
 
+
  /routing bgp advertisements print
−
  show ip route
+
  /ip route print
−
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==
 
==Referensi==

Revision as of 11:45, 3 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 Fisik

ISP1 


ISP1 ether0 -> ISP3 ether0
ISP1 ether1 -> ISP2 ether1
ISP2 ether0 -> ISP3 ether1

ISP1 ether2 10.100.100.1/24
ISP1 ether3 10.100.200.1/24

ISP2 ether2 10.10.10.1/24
ISP2 ether3 10.10.20.1/24

ISP3 ether2 10.1.1.1/24
ISP3 ether3 10.1.2.1/24


Setup connection

ISP1 

/ip address add interface=ether1 address=192.168.1.1/24
/ip address add interface=ether2 address=192.168.3.1/24
/ip address add interface=ether3 address=10.100.100.1/24
/ip address add interface=ether3 address=10.100.200.1/24

ISP2 

/ip address add interface=ether1 address=192.168.2.1/24
/ip address add interface=ether2 address=192.168.3.2/24
/ip address add interface=ether3 address=10.10.10.1/24
/ip address add interface=ether4 address=10.10.20.1/24

ISP3 

/ip address add interface=ether1 address=192.168.1.2/24
/ip address add interface=ether2 address=192.168.2.2/24
/ip address add interface=ether3 address=10.1.1.1/24
/ip address add interface=ether4 address=10.1.2.1/24

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 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
#
# advertize routing
#
/routing bgp network
add network=10.100.100.0/24 synchronize=no
add network=10.100.200.0/24 synchronize=no

ISP2: 

#set our AS number
/routing bgp instance set default as=20
#add BGP peers
/routing bgp peer
add name=toISP1 remote-address=192.168.3.1 remote-as=10
add name=toISP3 remote-address=192.168.2.2 remote-as=30
#
# advertize routing
#
/routing bgp network
add network=10.10.10.0/24 synchronize=no
add network=10.10.20.0/24 synchronize=no

ISP3: 

#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
#
# advertize routing
#
/routing bgp network
add network=10.1.1.0/24 synchronize=no
add network=10.1.2.0/24 synchronize=no

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
# setup routing filter
#
/routing bgp peer
set toISP1 in-filter=isp1-in out-filter=isp1-out
set toISP2 in-filter=isp2-in out-filter=isp2-out
#
# 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

Cek

/routing filter print
/routing bgp instance print
/routing bgp peer print status
/routing bgp peer print
/routing bgp advertisements print 
/ip route print

Referensi

Pranala Menarik

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