October 13, 2004
Simple BGP: One ISP, One Router
Learn how to configure a simple BGP setup with one ISP and one router. This guide covers BGP settings, network configuration, and routing details for efficient network management.
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 !