Beer? Sushi? Beer? I'm in. As Miguel noted, we at Earthlink/Mindspring/OneMain continue our ongoing AS integrations(we have over 30). A few additional gotcha's and benefits that come to mind you might want to consider include better IP space utilization, elimination of backdoor routes, radb updates, use of NSSA/TSA, peering benefits, and the use of 'local-as' options. IP space utilization can be benefited by consolidating IP space into larger and more useful aggregates. Which also results in better announcements, and a happier NANOG community :). Backdoor routes based on the integrated AS's, if currently used, become obsolete. A minor detail. RADB updates should be made so that your IP space is correctly registered to the kept AS#. Particularly important if any of your transits/peers base their filters on such a database. Not-so-stubby and totally stubby areas, if they fit your design, are a good way to prevent over-load of your smaller routers with an increased LSDB size, and especially if you have a lot of redistribution going on in your network. If you are interested in peering, presenting your network as a single AS where you can advertise routes consistently in multiple locations is another great benefit and helps meet some of the more stringent peering requirements. Without going too much into the value of peering, if done correctly your overall transit costs can be significantly reduced as well as better latency for your users. (This is a good way to impress the boss.) By specifying the local as, you can integrate IGPs and build your confederation completely transparent to the outside world. Junipers and Cisco's, among others, both support this option. Note, the last I checked you can't specify different local AS#s for peers within a Cisco peer group. This is only a start.. It's not overly difficult, and depending on the size of your network (and staff), probably worth it. Justin, I'd be happy to share our experiences with you sometime at NANOG. Thanks, Josh Fleishman Sr. Network Engineer/Peering Coordinator Earthlink