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Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum
On Tue, 19 Aug 2008, Michael Thomas wrote: > Justin M. Streiner wrote: > > > > I don't operate an ISP network (not anymore, anyway...). My customers > > are departments within my organization, so a /64 per department/VLAN > > is more sane/reasonable for my environment. > > Uh, the lower 64 bits of an IP6 address aren't used for routing you > know? They're essentially the mac address, or some other sort of > autoconf'd host identifier. Last I heard, the smallest allocation is > supposed to be a /48 -- I hadn't heard of the /56 thing that Michael was > speaking of, though I'm not surprised. There's 64 bits for routing... no > need to be so stingy :) It doesn't make sense to allocate a /48 to a (V)LAN. Address autoconfiguration is based on the assumption that the only reason for having more than one global /64 prefix on a LAN is during renumbering. Tony. -- f.anthony.n.finch <dot@xxxxxxxx> http://dotat.at/ HEBRIDES BAILEY FAIR ISLE FAEROES: NORTH OR NORTHEAST 5 OR 6 DECREASING 4 OR 5, BECOMING VARIABLE 3 IN NORTH BAILEY AND WEST FAEROES LATER. MODERATE OR ROUGH. MAINLY FAIR. MODERATE OR GOOD.