Rob: During the Development of the IDRP specification, there we discussion about how to automatically generate from the IGP information, the information necessary to send in BGP/IDRP. Have you read the paper by Yakov, Dave Oran, and myself on this? It was written a while ago. I can send you a copy. The single core corporate, with single homed may be currently a winner - due to security and ease of access. However, it may be that the future, will require more redundancy for certain businesses who use the Internet to sell services. At that point multi-homed corporate networks may grow out of the 5%. The multi-homed network prefixes, could be generated form IGP information. Please don't take this as a should, but a thoughtful response on what "might" be. Best wishes, Sue Hares