
Hi Aaron,
What happened was, when I turned up my new 10 gig Telia Internet connection a few days ago, I needed to balance out my (4) 10 gig internet connections so I chopped up a /17 into (4) /19's. When I did this, I was still advertising the /17 to my local caches, but I was advertising the (4) /19's , one on each of my (4) 10 gig internet connections. So the caches out on the public internet were learning more specific prefixes (longer masks) then my local caches were learning... so the caches on the internet were being used instead of my local caches. Once google and Netflix tech support helped to make me aware of this, I correctly sent the additional (4) /19's to my caches and now all is well.
Please instead advertise the /17 on all your Telia uplinks. You should *additionally* advertise the four /19s to the different links, but make sure to tag them with the NO_EXPORT community so they don't propagate outside Telia. That way you get the traffic engineering you want (i.e., load balancing of ingress traffic from Telia), while at the same time avoiding coming across as a self-serving jerk to everyone else on the Internet by not polluting their routing tables/FIBs with four entirely superfluous /19s. Tore