Difference between revisions of "Cisco: BGP 2 BGP redistribute 2 OSPF"
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| Line 70: | Line 70: | ||
end | end | ||
| − | + | ISP3 | |
enable | enable | ||
configure terminal | configure terminal | ||
interface Ethernet1/0 | interface Ethernet1/0 | ||
| − | ip address 192.168.2 | + | ip address 192.168.1.2 255.255.255.0 |
no shutdown | no shutdown | ||
exit | exit | ||
interface Ethernet1/1 | interface Ethernet1/1 | ||
| − | ip address 192.168. | + | ip address 192.168.2.2 255.255.255.0 |
no shutdown | no shutdown | ||
exit | exit | ||
interface Ethernet1/2 | interface Ethernet1/2 | ||
| − | ip address 10. | + | ip address 10.1.1.1 255.255.255.0 |
no shutdown | no shutdown | ||
exit | exit | ||
interface Ethernet1/3 | interface Ethernet1/3 | ||
| − | ip address 10. | + | ip address 10.1.2.1 255.255.255.0 |
no shutdown | no shutdown | ||
exit | exit | ||
end | end | ||
| − | + | ||
| + | R4 | ||
enable | enable | ||
| Line 115: | Line 116: | ||
| − | + | R5 | |
| − | + | 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== | ==BGP Peering== | ||
Revision as of 05:36, 28 December 2018
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
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 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
R5
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
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
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
end
OSPF
ISP3
enable configure terminal
! ! area 0 = backbone router ospf 3 network 10.10.1.0 0.0.0.3 area 0.0.0.0 network 10.10.1.4 0.0.0.3 area 0.0.0.0 end
R4
enable configure terminal ! ! area 0 = backbone router ospf 4 network 10.10.1.0 0.0.0.3 area 0.0.0.0 network 10.10.1.4 0.0.0.3 area 0.0.0.0 end
R5
enable configure terminal ! ! area 0 = backbone router ospf 5 network 10.10.1.0 0.0.0.3 area 0.0.0.0 network 10.10.1.4 0.0.0.3 area 0.0.0.0 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
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