My favorite talks from today:
Softspeak: Making VoIP Play Well in Existing 802.11 Deployments
Patrick Verkaik, Yuvraj Agarwal, Rajesh Gupta, and Alex C. Snoeren, University of California, San Diego
Making Routers Last Longer with ViAggre
Hitesh Ballani, Paul Francis, and Tuan Cao, Cornell University; Jia Wang, AT&T Labs—Research
Cheeky title aside, this paper focuses on the problem of reducing the size of the expensive FIB memory in Internet routers as the routing table sizes increase. The key idea is to partition forwarding responsibility so that each router only maintains routes to a fraction of the IP address space. This can be supported on unmodified routers by using separate "route reflectors" that filter the routing tables on behalf of the routers themselves. Of course, this approach requires encapsulation and tunneling since intermediate routers don't have the complete routing information.
Ironically, the talk just before this (NetReview: Detecting When Interdomain Routing Goes Wrong) dealt with detecting BGP misconfigurations -- the ViAggre approach adds even more complexity and potentially creates a nightmare for someone trying to debug their network (or, at least for Andreas). That said they've thought hard about how to make this deployable in practice.