Difference between revisions of "Cisco: BGP 2 BGP redistribute 2 OSPF"

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Line 1: Line 1:
−
[[File:3BGP-2OSPF.png|center|300px|thumb]]
+
[[File:2BGP-2OSPF.png|center|300px|thumb]]
  
  
Line 10: Line 10:
 
  IP 10.100.100.0/24
 
  IP 10.100.100.0/24
 
  IP 10.100.200.0/24
 
  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)
 
ISP3 (kita)
Line 24: Line 17:
 
  IP 10.1.1.0/24
 
  IP 10.1.1.0/24
 
  IP 10.1.2.0/24  
 
  IP 10.1.2.0/24  
 +
 +
 +
R4
 +
 +
IP 10.1.1.2/24 menuju ISP3
 +
IP 172.16.1.1  menuju R5
 +
IP 172.16.10.1 LAN
 +
IP 172.16.20.1 LAN
 +
 +
R5
 +
 +
IP 10.1.2.2/24 menuju ISP3
 +
IP 172.16.1.2  menuju R4
 +
IP 172.16.100.1/24 LAN
 +
IP 172.16.200.1/24 LAN
  
  
Line 44: Line 52:
 
  ISP3 Eth1/3 10.1.2.1/24
 
  ISP3 Eth1/3 10.1.2.1/24
  
−
 
+
R4 Eth1/0 -> ISP3 Eth1/2
 +
R5 Eth1/0 -> ISP3 Eth1/3
 +
R4 Eth1/1 -> R5 Eth1/1
  
 
==Setup connection==
 
==Setup connection==
Line 168: Line 178:
 
   router bgp 30
 
   router bgp 30
 
   bgp router-id 192.168.1.2
 
   bgp router-id 192.168.1.2
 +
    no synchronization
 +
    bgp log-neighbor-changes
 
     network 10.1.1.0 mask 255.255.255.0
 
     network 10.1.1.0 mask 255.255.255.0
 
     network 10.1.2.0 mask 255.255.255.0
 
     network 10.1.2.0 mask 255.255.255.0
 
     neighbor 192.168.1.1 remote-as 10
 
     neighbor 192.168.1.1 remote-as 10
 +
    redistribute ospf 3 metric 100
 
   end
 
   end
  
Line 177: Line 190:
 
ISP3
 
ISP3
  
−
enable
+
enable
−
configure terminal
+
configure terminal
 
   !
 
   !
 
   ! area 0 = backbone
 
   ! area 0 = backbone
Line 184: Line 197:
 
   network 10.1.1.0 0.0.0.255 area 0.0.0.0
 
   network 10.1.1.0 0.0.0.255 area 0.0.0.0
 
   network 10.1.2.0 0.0.0.255 area 0.0.0.0
 
   network 10.1.2.0 0.0.0.255 area 0.0.0.0
 +
  !
 +
  ! redistribute routing BGP
 +
  redistribute bgp 30 subnets
 
   end
 
   end
  

Latest revision as of 05:29, 5 January 2019

2BGP-2OSPF.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

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


R4 

IP 10.1.1.2/24 menuju ISP3
IP 172.16.1.1  menuju R5
IP 172.16.10.1 LAN
IP 172.16.20.1 LAN

R5 

IP 10.1.2.2/24 menuju ISP3
IP 172.16.1.2  menuju R4
IP 172.16.100.1/24 LAN
IP 172.16.200.1/24 LAN


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

R4 Eth1/0 -> ISP3 Eth1/2
R5 Eth1/0 -> ISP3 Eth1/3
R4 Eth1/1 -> R5 Eth1/1

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

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


R4 

enable
configure terminal
  interface Ethernet1/0
    ip address 10.1.1.2 255.255.255.0
    no shutdown
    exit
  interface Ethernet1/1
    ip address 172.16.1.1 255.255.255.0
    no shutdown
    exit
  interface Ethernet1/2
    ip address 172.16.10.1 255.255.255.0
    no shutdown
    exit
  interface Ethernet1/3
    ip address 172.16.20.1 255.255.255.0
    no shutdown
    exit
 end


R5 

enable
configure terminal
  interface Ethernet1/0
    ip address 10.1.2.2 255.255.255.0
    no shutdown
    exit
  interface Ethernet1/1
    ip address 172.16.1.2 255.255.255.0
    no shutdown
    exit
  interface Ethernet1/2
    ip address 172.16.100.1 255.255.255.0
    no shutdown
    exit
  interface Ethernet1/3
    ip address 172.16.200.1 255.255.255.0
    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
    network 10.100.100.0 mask 255.255.255.0
    network 10.100.200.0 mask 255.255.255.0
    neighbor 192.168.1.2 remote-as 30
  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
    no synchronization
    bgp log-neighbor-changes
    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
    redistribute ospf 3 metric 100 
  end

OSPF

ISP3 

enable
configure terminal
 !
 ! area 0 = backbone
 router ospf 3
 network 10.1.1.0 0.0.0.255 area 0.0.0.0
 network 10.1.2.0 0.0.0.255 area 0.0.0.0
 !
 ! redistribute routing BGP
 redistribute bgp 30 subnets
 end


R4 

enable
configure terminal
 !
 ! area 0 = backbone
 router ospf 4
 network 10.1.1.0 0.0.0.255 area 0.0.0.0
 network 172.16.1.0 0.0.0.255 area 0.0.0.0
 network 172.16.10.0 0.0.0.255 area 0.0.0.0
 network 172.16.20.0 0.0.0.255 area 0.0.0.0
 end


R5 

enable
configure terminal
  !
  ! area 0 = backbone
  router ospf 5
  network 10.1.2.0 0.0.0.255 area 0.0.0.0
  network 172.16.1.0 0.0.0.255 area 0.0.0.0
  network 172.16.100.0 0.0.0.255 area 0.0.0.0
  network 172.16.200.0 0.0.0.255 area 0.0.0.0
  end

Cek

! perhatikan AS 30 di tambahkan 5x ke routing ke arah AS 10
!
clear ip bgp 10
clear ip bgp 20
show ip bgp
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 neighbor 192.168.1.1 routes
show bgp ipv4 unicast neighbors 
show bgp ipv4 unicast summary

Referensi



Pranala Menarik

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