LDP Fast Convergence

Fast-Reroute allows traffic across TE LSPs to be rerouted in the event of a failure in 10s of milliseconds. It is desirable to have the ability for similar fast convergence for LDP traffic in the event of a link or a node failure without utilizing traffic engineering. This presentation will describe taking advantage of LSR mechanisms available for fast-reroute and applying them to LDP traffic. To do this, an alternate or backup path must be known for each LDP FEC; this mechanism and some methods to determine that an alternate path is acceptable will be discussed.