Cisco: BGP 2 BGP redistribute 2 OSPF: Difference between revisions
From OnnoCenterWiki
Jump to navigationJump to search
Onnowpurbo (talk | contribs) |
Onnowpurbo (talk | contribs) |
||
| (8 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
[[File: | [[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 | ||
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 | ||
router ospf 3 | router ospf 3 | ||
network 10. | network 10.1.1.0 0.0.0.255 area 0.0.0.0 | ||
network 10. | network 10.1.2.0 0.0.0.255 area 0.0.0.0 | ||
! | |||
! redistribute routing BGP | |||
redistribute bgp 30 subnets | |||
end | end | ||
| Line 194: | Line 210: | ||
! area 0 = backbone | ! area 0 = backbone | ||
router ospf 4 | router ospf 4 | ||
network 10. | network 10.1.1.0 0.0.0.255 area 0.0.0.0 | ||
network 10. | 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 | end | ||
| Line 207: | Line 225: | ||
! area 0 = backbone | ! area 0 = backbone | ||
router ospf 5 | router ospf 5 | ||
network 10. | network 10.1.2.0 0.0.0.255 area 0.0.0.0 | ||
network | 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 | end | ||
| Line 215: | Line 235: | ||
! perhatikan AS 30 di tambahkan 5x ke routing ke arah AS 10 | ! 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 bgp | ||
show ip route | |||
Latest revision as of 22:29, 4 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
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
- 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
