JN> My current opinion is that since we can't accept much JN> downtime in the case of a single provider failure, it's JN> probably not wise to put all of our eggs in Sprint's basket JN> even if all circuits are geographically diverse.

Use multiple border routers. Keep your IGP lean and nimble. Think about BGP/IGP synchronization.

WAN links can fail, but so can ethernet links and entire routers.

We have multiple border routers and are fairly redundant internally. As it is now, any single piece of equipment could fail (except in one case that I intend to rectify soon) or any two of our three Internet connections could fail and no one would notice much except for perhaps slower connections. I've discovered the wonders of fault-tolerant transceivers and I'll be redesigning a portion of that part of the network around them. Once I'm done, quite literally any single device could fail and no one would notice. John --