TALK ANNOUNCEMENT: Title: BGP convergence in much less than a second Speaker: Pierre Francois, Universite Catholique de Louvain Date: 11:00am on Friday December 14 Location: CS room 402 Abstract -------- This talk will about recent improvements to the Border Gateway Protocol, the routing protocol used by Internet Service Providers to exchange routing information to provide Internet-wide connectivity. It will show how a fast recovery of connectivity can now be achieved in the case of a link or node failure within an ISP network. We will emphasize that most business cases allow a local BGP recovery (convergence) in case of failure, i.e. a convergence where inter-domain path exploration is actually not required to recover the connectivity after a failure. We will show that although convergence could be local, iBGP deployements do not favor the propagation of alternate paths within an ISP network, which artificially lead to transient lack of connectivity, disclosed to neighboring peers. We will then turn to router implementation issues that could not allow a fast convergence of BGP due to the scaling factors of BGP Reaching sub-second convergence of BGP will however be shown possible by first allowing a better propagation of alternate paths within ISP networks, and second enable the recent improvements to BGP router implementations and to Forwarding Information Bases designs.