I'm looking for some good material on the methodology (best practices) of moderately-complex BGP policy development. I've found no shortage of the tools (prefix lists, community list filters, route maps, etc) for *implementation* of BGP policy. Including plenty of router configuration examples. I'm looking for help with the steps before the router configuration. What is a good methodology to go from a set of (~30-50) narrative descriptions ("Propagate prefixes received from Customer Type X only to Peers Type Y") into a optimal, comprehensive set of community definitions, prefix/community/ASpath filters, route maps, peer templates, policy statements, etc? What methodology works for you? Are there presentations/papers/books/discussion threads that cover this aspect of routing policy development that you would recommend? Thanks for your help. Pete.