Simple BGP: One ISP, One Router

October 13, 2004

Configuration Details:
Local ASN – 3000
ISP ASN – 2000
Local Networks – 10.1.1.0/23, 192.168.50.0/22
Cross-Connected Circuit to ISP – 172.16.100.0/32
(ISP Router = 172.16.100.1, Customer Router = 172.16.100.2
Interface = FastEthernet 1/1/1)
interface FastEthernet1/1/1
 ip address 172.16.100.2 255.255.255.252
!
router bgp 3000
 network 10.1.1.0/23
 network 192.168.50.0/22
 neighbor 172.16.100.2 remote-as 2000
 neighbor 172.16.100.2 soft-reconfiguration inbound
 neighbor 172.16.100.2 filter-list 100 out
 neighbor 172.16.100.2 next-hop-self
 ip as-path access-list 100 permit ^$
 ip route 10.1.1.0/23 null0 distance 250
 ip route 192.168.50.0/22 null0 distance 250
!

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