The State of Traffic Engineering an ISP's Perspective

This talk will go over the current state of the major Traffic Engineering solutions (starting with basic static routing and working through IGP as MED, AIGP, RSVP-TE, additional RSVP tweaks, SR-TE, SRv6, and various PCE solutions) following our internal project to determine which way to go for the next couple years. Large scale ISPs have different requirements than either enterprise or large-scale web service providers, and those requirements steer us differently. Pros and cons from that perspective for each method will be reviewed, and a readout on both the current state as we see it, along with where we see the future going and some thoughts about the problems that still need solving. This talk is set at a white paper level, and is not aimed to go deep into the technical details about each of the options (as that would take a substantial time slot), but some technical items will be called out if they were a major issue.