Subject: Will IPv4 be formally deprecated when IPv6 is good enough ? Date: Tue, Oct 14, 2003 at 11:43:36PM +0930 Quoting Mark Smith ([EMAIL PROTECTED]): > That brings to my mind two questions > > a) Is IPv4 going to be formally deprecated when IPv6 is good enough? If so, are the > related IPv4 NAT RFCs also going to be deprecated at that time ?
Do not think so. Maybe it is my limited mind, but I find it hard not to keep v4 on some boxes. > b) Is IPv6 good enough yet ? I think so. There are valid concerns on two things; multihoming and address allocation procedures. There seems to be strong forces among the researchers and vendors advocting that we halt and wait for the Grail of multihoming while we at the same time work very hard in preventing people from getting allocations, to preserve address space and keep the routing table size down. I think the address allocation problem is based on v4 habits. v6 is abundant. We need it to be available. Nothing will happen until people can get real allocations with relative ease, not so easy that nuisance allocations will occur, but almost. Give every AS number holder a /32 or something, and watch deployment speed up. With multihoming, strongly related to above, I suggest people cease waiting for the Grail and instead adopt the v4 model, aided by the limited growth we'd see if people did not have to patch their nets together using disjunct prefixes. I believe routing table growth would be much slower, and there are suggestions I find supportive of this in some analyses of routing table characteristics, for example in <http://www.caida.org/outreach/papers/2002/EGR/>: "Small ASes (those who originate only a few prefixes into the global routing system) do not contribute more than their fair share of either route entries or churn to the global routing system." Thus, if most ASen were able to contain all their hosts within one single /32 per AS, we would see limited routing table growth for some years, during which there would be time to develop more sophisticated routing paradigms, if operational experience dictated such a need was indeed present. The key words here are "operational experience". We need to get people start using v6 for everyday things. -- M�ns Nilsson Systems Specialist +46 70 681 7204 KTHNOC MN1334-RIPE This TOPS OFF my partygoing experience! Someone I DON'T LIKE is talking to me about a HEART-WARMING European film ...
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