Difference between revisions of "Cisco: BGP Dua Link main backup"

Latest revision as of 06:59, 24 January 2019

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
    ! 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

Main / Backup Link Setup di ISP3

Lakukan

accept network kita sendiri
drop semua tabel IP lainnya, karena kita tidak mau menjadi transit provider
BGP AS prepend - menaikan AS path ke salah satu ISP (disini ISP1)

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 198.168.1.1 route-map PREPEND out
    neighbor 192.168.2.1 remote-as 20
    neighbor 192.168.1.1 activate
    neighbor 192.168.2.1 activate 
    route-map PREPEND permit 10
    set as-path prepend 30 30 30 30 30
  end

Cek

! perhatikan AS 30 di tambahkan 5x ke routing ke arah AS 10
!
show ip bgp

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

@@ Line 150: / Line 150: @@
       neighbor 192.168.2.2 activate
     end
+==Main / Backup Link Setup di ISP3==
+Lakukan
+* accept network kita sendiri
+* drop semua tabel IP lainnya, karena kita tidak mau menjadi transit provider
+* BGP AS prepend - menaikan AS path ke salah satu ISP (disini ISP1)
 ISP3:
@@ Line 161: / Line 170: @@
       network 10.1.2.0 mask 255.255.255.0
       neighbor 192.168.1.1 remote-as 10
+     neighbor 198.168.1.1 route-map PREPEND out
       neighbor 192.168.2.1 remote-as 20
       neighbor 192.168.1.1 activate
       neighbor 192.168.2.1 activate
+     route-map PREPEND permit 10
+     set as-path prepend 30 30 30 30 30
     end
+==Cek==
+ ! perhatikan AS 30 di tambahkan 5x ke routing ke arah AS 10
-==Main/Backup link setup==
+  !
+  show ip bgp
-===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
-==Cek==
   show ip route
@@ Line 226: / Line 199: @@
 ==Pranala Menarik==
+* [[TCP/IP: Advanced Routing]]
 * [[Quagga]]
+* [[VyOS]]
 * [[Mikrotik]]
 * [[Cisco]]
 * [[Juniper]]
+* [[BIRD1]]
+* [[BIRD2]]
+* [[IPv6]]
+* [[TCP/IP: Advanced Routing]]
+* [[IPv6: Advanced Routing]]
+* [[IPv6: Quagga]]
+* [[IPv6: VyOS]]
+* [[IPv6: Mikrotik]]
+* [[IPv6: Cisco]]
+* [[IPv6: Juniper]]
+* [[IPv6: BIRD1]]
+* [[IPv6: BIRD2]]
+* [[IPv6]]

Difference between revisions of "Cisco: BGP Dua Link main backup"

Latest revision as of 06:59, 24 January 2019

Contents

Sambungan Fisik

Setup connection

BGP Peering

Main / Backup Link Setup di ISP3

Cek

Referensi

Pranala Menarik

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