On 1-Apr-2007, at 23:11, Nathan Ward wrote:
Assuming these providers also buy domestic transit from TelstraClear, AS_PATHs look like: - TelstraClear AUT - APE Orcon AUT Shortest AS_PATH wins.
I'd presume that highest LOCAL_PREF wins, actually. If I was running an ISP, I'd probably ensure that I had an import policy which promoted private peering > public peering > paid peering
transit in general.
Anybody who doesn't incorporate such policy into their network presumably doesn't care how much it costs (or how long it takes) to deliver a packet, and hence it doesn't matter which way the packets go. Assuming that any of this matters, customers of such an ISP will presumably migrate elsewhere naturally, and the problem (from the perspective of the AS originating the routes) will solve itself. Joe