Difference between revisions of "Cisco: BGP Sederhana tanpa filter"
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neighbor 192.168.3.2 remote-as 20 | neighbor 192.168.3.2 remote-as 20 | ||
neighbor 192.168.1.2 remote-as 30 | neighbor 192.168.1.2 remote-as 30 | ||
+ | neighbor 192.168.3.2 activate | ||
+ | neighbor 192.168.1.2 activate | ||
! neighbor 192.168.3.2 default-originate | ! neighbor 192.168.3.2 default-originate | ||
! neighbor 192.168.1.2 default-originate | ! neighbor 192.168.1.2 default-originate | ||
Line 155: | Line 157: | ||
neighbor 192.168.3.1 remote-as 10 | neighbor 192.168.3.1 remote-as 10 | ||
neighbor 192.168.2.2 remote-as 30 | neighbor 192.168.2.2 remote-as 30 | ||
+ | neighbor 192.168.3.1 activate | ||
+ | neighbor 192.168.2.2 activate | ||
end | end | ||
Line 168: | Line 172: | ||
neighbor 192.168.1.1 remote-as 10 | neighbor 192.168.1.1 remote-as 10 | ||
neighbor 192.168.2.1 remote-as 20 | neighbor 192.168.2.1 remote-as 20 | ||
+ | neighbor 192.168.1.1 activate | ||
+ | neighbor 192.168.2.1 activate | ||
end | end | ||
Revision as of 20:53, 26 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
ISP2
enable configure terminal interface Ethernet1/0 ip address 192.168.2.1 255.255.255.0 no shutdown exit interface Ethernet1/1 ip address 192.168.3.2 255.255.255.0 no shutdown exit interface Ethernet1/2 ip address 10.10.10.1 255.255.255.0 no shutdown exit interface Ethernet1/3 ip address 10.10.20.1 255.255.255.0 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 Ethernet1/2 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 address-family ipv4 unicast network 10.100.100.0 network 10.100.200.0 neighbor 192.168.3.2 remote-as 20 neighbor 192.168.1.2 remote-as 30 neighbor 192.168.3.2 activate neighbor 192.168.1.2 activate ! neighbor 192.168.3.2 default-originate ! neighbor 192.168.1.2 default-originate end
#set our AS number /routing bgp instance set default as=10 #add BGP peers /routing bgp peer add name=toISP2 remote-address=192.168.3.2 remote-as=20 add name=toISP3 remote-address=192.168.1.2 remote-as=30 # jika ingin redistribute default route ke client yang spesifik # add name=toISP2 remote-address=192.168.3.2 remote-as=20 default-originate=if-installed # add name=toISP3 remote-address=192.168.1.2 remote-as=30 default-originate=if-installed
ISP2:
enable configure terminal router bgp 20 bgp router-id 192.168.2.1 address-family ipv4 unicast network 10.10.10.0 network 10.10.20.0 neighbor 192.168.3.1 remote-as 10 neighbor 192.168.2.2 remote-as 30 neighbor 192.168.3.1 activate neighbor 192.168.2.2 activate end
ISP3:
enable configure terminal router bgp 30 bgp router-id 192.168.1.2 address-family ipv4 unicast network 10.1.1.0 network 10.1.2.0 neighbor 192.168.1.1 remote-as 10 neighbor 192.168.2.1 remote-as 20 neighbor 192.168.1.1 activate neighbor 192.168.2.1 activate end
#set our AS number /routing bgp instance set default as=30 #add BGP peers /routing bgp peer add name=toISP1 remote-address=192.168.1.1 remote-as=10 add name=toISP2 remote-address=192.168.2.1 remote-as=20
Network Advertisements and Routing Filters
Now we can start to advertise our networks and filter out all other unnecessary advertisements.
ISP1:
/routing bgp network add network=10.100.100.0/24 synchronize=no add network=10.100.200.0/24 synchronize=no
ISP2:
/routing bgp network add network=10.10.10.0/24 synchronize=no add network=10.10.20.0/24 synchronize=no
ISP3:
First step is to advertise our networks
/routing bgp network add network=10.1.1.0/24 synchronize=no add network=10.1.2.0/24 synchronize=no
Cek routing
/ip route print
Next step is to specify which routing filter chains will be used
/routing bgp peer set isp1 in-filter=isp1-in out-filter=isp1-out set isp2 in-filter=isp2-in out-filter=isp2-out
in-filter is for incoming (received) prefixes, out-filter is for advertised prefixes.
Cek
show ip route show ip bgp neighbors 192.168.2.2 advertised-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