On Wed, 2001-10-10 at 15:24, Nipper, Arnold wrote:
Of course another prefix and another AS is added to the routing table but thereby you are witdrawing at least more than two (both prefs as well as AS). ==> table gets smaller.
Your math is confusing... or maybe I'm misunderstanding the obvious. Yes, multihoming adds another AS and (at least one) (longish) prefix to the routing table. But in your reasoning, which two prefixes and one AS are being withdrawn? If I resiliently multi-home to one ISP, and I get my address space from its block, I do not add any prefix or AS to the (global) routing table. Even if I multi-home to two ISPs and selectively NAT depending on the outgoing connection, I'll be NAT-ing into the respective ISP's address space (which I presume is properly aggregated), adding no prefix or AS. Cheers, Steven