BGP Aggregate-Address

The BGP aggregate-address can be used to summarise a set of networks into a single prefix. In the diagram below, I’m going to use R2 to summarise prefixes inside AS20 & AS30, then send the summary to R3. Let’s hop onto R2 and set this up. R2(config)#router bgp 10 R2(config-router)#aggregate-address 206.25.128.0 255.255.128.0 summary-only We configure … Continue reading BGP Aggregate-Address