IPv6: Cisco: BGP Dua Link main backup
Jump to navigation
Jump to search
ERROR:
R3(config-router)# neighbor 2001:198:168:1::1 route-map PREPEND out % Specify remote-as or peer-group commands first
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
ipv6 unicast-routing
interface Ethernet1/0
ip address 192.168.1.1 255.255.255.0
ipv6 address 2001:192:168:1::1/64
no shutdown
exit
ipv6 unicast-routing
interface Ethernet1/1
ip address 192.168.3.1 255.255.255.0
ipv6 address 2001:192:168:3::1/64
no shutdown
exit
ipv6 unicast-routing
interface Ethernet1/2
ip address 10.100.100.1 255.255.255.0
ipv6 address 2001:10:100:100::1/64
no shutdown
exit
ipv6 unicast-routing
interface Ethernet1/3
ip address 10.100.200.1 255.255.255.0
ipv6 address 2001:10:100:200::1/64
no shutdown
exit
end
ISP2
enable
configure terminal
ipv6 unicast-routing
interface Ethernet1/0
ip address 192.168.2.1 255.255.255.0
ipv6 address 2001:192:168:2::1/64
no shutdown
exit
ipv6 unicast-routing
interface Ethernet1/1
ip address 192.168.3.2 255.255.255.0
ipv6 address 2001:192:168:3::2/64
no shutdown
exit
ipv6 unicast-routing
interface Ethernet1/2
ip address 10.10.10.1 255.255.255.0
ipv6 address 2001:10:10:10::1/64
no shutdown
exit
ipv6 unicast-routing
interface Ethernet1/3
ip address 10.10.20.1 255.255.255.0
ipv6 address 2001:10:10:20::1/64
no shutdown
exit
end
ISP3
enable
configure terminal
ipv6 unicast-routing
interface Ethernet1/0
ip address 192.168.1.2 255.255.255.0
ipv6 address 2001:192:168:1::2/64
no shutdown
exit
ipv6 unicast-routing
interface Ethernet1/1
ip address 192.168.2.2 255.255.255.0
ipv6 address 2001:192:168:2::2/64
no shutdown
exit
ipv6 unicast-routing
interface Ethernet1/2
ip address 10.1.1.1 255.255.255.0
ipv6 address 2001:10:1:1::1/64
no shutdown
exit
ipv6 unicast-routing
interface Ethernet1/3
ip address 10.1.2.1 255.255.255.0
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:
enable
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 mask 255.255.255.0
network 10.100.200.0 mask 255.255.255.0
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 mask 255.255.255.0
network 10.100.200.0 mask 255.255.255.0
neighbor 192.168.1.2 activate
end
ISP2:
enable
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 mask 255.255.255.0
network 10.10.20.0 mask 255.255.255.0
neighbor 192.168.3.1 activate
!
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 mask 255.255.255.0
network 10.10.20.0 mask 255.255.255.0
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
! no bgp default ipv4-unicast
bgp router-id 192.168.1.2
!
neighbor 2001:192:168:1::1 remote-as 10
address-family ipv6 unicast
network 2001:10:1:1::/64
network 2001:10:1:2::/64
neighbor 2001:192:168:1::1 activate
neighbor 192.168.1.1 remote-as 10
! 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 activate
!
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
neighbor 2001:192:168:2::1 activate
!
neighbor 192.168.2.1 remote-as 20
! 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 192.168.2.1 activate
end
enable
configure terminal
router bgp 30
route-map PREPEND permit 10
set as-path prepend 30 30 30 30 30
exit
router bgp 30
neighbor 2001:192:168:1::1 remote-as 10
neighbor 2001:198:168:1::1 route-map PREPEND out
neighbor 192.168.1.1 remote-as 10
neighbor 198.168.1.1 route-map PREPEND out
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
- https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-16/irg-xe-16-book/configuring-a-basic-bgp-network.html
- https://wiki.mikrotik.com/wiki/Manual:Simple_BGP_Multihoming
Pranala Menarik