The first set of BGP labs covered the basics; the next four will help you master simple routing policy tools (BGP weights, AS-path filters, prefix filters) using real-life examples:

• Use BGP weights to prefer one of the upstream providers
• Prevent route leaking between upstream providers with an AS-path filter
• Filter prefixes advertised by your autonomous system with a prefix list
• Minimize the size of your BGP table with inbound filters

The labs are best used with netlab (it supports BGP on almost 20 different devices), but you could use any system you like (including GNS3 and CML/VIRL). For more details, read the Installation and Setup documentation.