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73416ba
(Get the code!)
The use case for fast exit is real. I'd like to see this work so that we can enable DVR routers connecting external gateways to routed provider networks and taking advantage of BGP routing.
As for the implementation details...
As an operator, I would expect fast exit from my DVR routers when the address scopes on the respective internal and external networks match *and* I have some mechanism turned on to route back (like BGP host routes). As a user, I'd just like to know that my router is doing the best job possible to avoid extra hops and bottlenecks and I don't need to know all of the details.
Do we already know everything we need to know to turn on fast exit?