>> this is called path poisoning. an italian friend used it in his phd >> thesis. a few friends and i used it to detect use of default across >> the internet. > > I've done this in the past as a work-around for insufficient BGP > community support. Just prepending the AS I wanted to ignore the > paths. > > But, if the problem is an anycast CDN choosing a sub-optimal path to > reach you, you might try reaching out to them. They're probably just > as, if not more interested, in getting their traffic to you as > efficiently as possible.
apologies. i should have been more explicit. both of the examples were using path poisoning for routing research. it is not a technique i would reccommend in normal operations. randy