> From: Martin Rex [mrex@xxxxxxx] > > IPv6 PA prefixes result in that awkward renumbering. Avoiding the > renumbering implies provider independent network prefix. > > With IPv4, you would have typically keept your IPv4 network address > (the old class A, B & C from early 199x) even when changing network > providers. I've been told that ISPs don't like routing to their customers using routing-independent prefixes (in IPv4), and that the result is that small organizations (in practice) use provider address space. Certainly there would be a problem with routing table size if all organizations used provider-independent prefixes. Dale