I am currently reading about Routing around Congestion Defense and the non feasibility of this approach. Since to use this method a lot of BGP poisoning would be necessary and to switch paths several times also a problem called "path hunting" comes into play I need to understand the update process and message propagation.
When I send out BGP Update messages that poison paths on selected ASes on the Network, how do these ASes further propagate the routing information, will they propagate them also to poisoned neighbors? How many hops will they be propagated (for poisoned/unpoisoned ASes)? Can I decide which way my BGP Update message takes and will all ASes read the message and also update their routing information on the path to my desired destination?