IPv6: Quagga: BGP Dua Link main backup

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ERROR: 

OpenWrt(config-router)# neighbor 2001:198:168:1::1 route-map PREPEND out
% Specify remote-as or peer-group commands first


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 eth0 -> ISP3 eth0
ISP1 eth1 -> ISP2 eth1
ISP2 eth0 -> ISP3 eth1

ISP1 eth2 10.100.100.1/24
ISP1 eth3 10.100.200.1/24

ISP2 eth2 10.10.10.1/24
ISP2 eth3 10.10.20.1/24

ISP3 eth2 10.1.1.1/24
ISP3 eth3 10.1.2.1/24

Setup connection

ISP1 

vtysh
configure terminal
  interface eth0
    ip address 192.168.1.1/24
    ipv6 address 2001:192:168:1::1/64
    no shutdown
    exit
  interface eth1
    ip address 192.168.3.1/24
    ipv6 address 2001:192:168:3::1/64
    no shutdown
    exit
  interface eth2
    ip address 10.100.100.1/24
    ipv6 address 2001:10:100:100::1/64
    no shutdown
    exit
  interface eth3
    ip address 10.100.200.1/24
    ipv6 address 2001:10:100:200::1/64
    no shutdown
    exit
 end

ISP2 

vtysh
configure terminal
  interface eth0
    ip address 192.168.2.1/24
    ipv6 address 2001:192:168:2::1/64
    no shutdown
    exit
  interface eth1
    ip address 192.168.3.2/24
    ipv6 address 2001:192:168:3::2/64
    no shutdown
    exit
  interface eth2
    ip address 10.10.10.1/24
    ipv6 address 2001:10:10:10::1/64
    no shutdown
    exit
  interface eth3
    ip address 10.10.20.1/24
    ipv6 address 2001:10:10:20::1/64
    no shutdown
    exit
 end

ISP3 

vtysh
configure terminal
  interface eth0
    ip address 192.168.1.2/24
    ipv6 address 2001:192:168:1::2/64
    no shutdown
    exit
  interface eth1
    ip address 192.168.2.2/24
    ipv6 address 2001:192:168:2::2/64
    no shutdown
    exit
  interface eth2
    ip address 10.1.1.1/24
    ipv6 address 2001:10:1:1::1/64
    no shutdown
    exit
  interface eth3
    ip address 10.1.2.1/24
    ipv6 address 2001:10:1:2::1/64
    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: 

vtysh
configure terminal
  router bgp 10
  ! no bgp default ipv4-unicast
  bgp router-id 192.168.1.1
    !
    neighbor 2001:192:168:3::2 remote-as 20
      address-family ipv6 unicast
        network 2001:10:100:100::/64
        network 2001:10:100:200::/64
      neighbor 2001:192:168:3::2 activate 
    neighbor 192.168.3.2 remote-as 20
      ! address-family ipv4 unicast 
      network 10.100.100.0/24
      network 10.100.200.0/24
      neighbor 192.168.3.2 activate 
    !
    neighbor 2001:192:168:1::2 remote-as 30
      address-family ipv6 unicast
        network 2001:10:100:100::/64
        network 2001:10:100:200::/64
      neighbor 2001:192:168:1::2 activate 
    neighbor 192.168.1.2 remote-as 30
      network 10.100.100.0/24
      network 10.100.200.0/24
      neighbor 192.168.1.2 activate
  end


ISP2: 

vtysh
configure terminal
  router bgp 20
  ! no bgp default ipv4-unicast
  bgp router-id 192.168.2.1
    neighbor 2001:192:168:3::1 remote-as 10
      address-family ipv6 unicast
        network 2001:10:10:10::/64
        network 2001:10:10:20::/64
      neighbor 2001:192:168:3::1 activate
    neighbor 192.168.3.1 remote-as 10
      ! address-family ipv4 unicast 
      network 10.10.10.0/24
      network 10.10.20.0/24
    !
    neighbor 2001:192:168:2::2 remote-as 30
      address-family ipv6 unicast
        network 2001:10:10:10::/64
        network 2001:10:10:20::/64
      neighbor 2001:192:168:2::2 activate 
    neighbor 192.168.2.2 remote-as 30
      ! address-family ipv4 unicast 
      network 10.10.10.0/24
      network 10.10.20.0/24
      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: 

vtysh
configure terminal
router bgp 30
! no bgp default ipv4-unicast
bgp router-id 192.168.1.2
neighbor 2001:192:168:1::1 remote-as 10
ipv6 bgp network 2001:10:1:1::/64
ipv6 bgp network 2001:10:1:2::/64
address-family ipv6 unicast
network 2001:10:1:1::/64
network 2001:10:1:2::/64
exit
neighbor 2001:192:168:1::1 activate
no neighbor 2001:192:168:1::1 shutdown
neighbor 2001:198:168:1::1 route-map PREPEND out
route-map PREPEND permit 10
set as-path prepend 30 30 30 30 30
end

vtysh
configure terminal
router bgp 30
! no bgp default ipv4-unicast
bgp router-id 192.168.1.2
neighbor 192.168.1.1 remote-as 10
address-family ipv4 unicast 
network 10.1.1.0/24
network 10.1.2.0/24
exit
no neighbor 192.168.1.1 shutdown
neighbor 192.168.1.1 activate
neighbor 198.168.1.1 route-map PREPEND out
route-map PREPEND permit 10
set as-path prepend 30 30 30 30 30
end

vtysh
configure terminal
router bgp 30
! no bgp default ipv4-unicast
bgp router-id 192.168.1.2
neighbor 2001:192:168:2::1 remote-as 20
address-family ipv6 unicast
network 2001:10:1:1::/64
network 2001:10:1:2::/64
exit
neighbor 2001:192:168:2::1 activate  
neighbor 192.168.2.1 remote-as 20
address-family ipv4 unicast 
network 10.1.1.0/24
network 10.1.2.0/24
exit
neighbor 192.168.2.1 activate
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

show ipv6 neighbors 
show ipv6 route
show bgp ipv6 unicast neighbors
show bgp ipv6 unicast summary

Referensi

Pranala Menarik


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