[ppml] /48 vs /32 micro allocations, answer: /48

Paul Vixie paul at vix.com
Wed Mar 16 19:40:17 EST 2005

> In any case there seems to be a strong consensus that /48's are ok for
> microallocations.

not from me.  RIRs should allocate only /32's and /128's, and the latter
only to critical infrastructure like root name servers.  the dominant cost
is "routing table slot" and this cost should not be paid unless there is
a universal benefit.  critical infrastructure is one such benefit.  "enough
stuff to warrant a /32" is another such benefit.  where's the unique yet
universal benefit of a /48?

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