Re: Last Call: <draft-weil-shared-transition-space-request-14.txt> (IANA Reserved IPv4 Prefix for Shared Address Space) to BCP

[james woodyatt <[e-mail]>]

everyone--

My position on this draft remains unchanged.  It is far too forgiving of the 6to4-PMT [I-D.kuarsingh-v6ops-6to4-provider-managed-tunnel] proposal, which I regard as abominable.  That reason alone, in my judgment, is sufficient grounds that it should not be published.  I also share the concerns of most of the opponents of this draft.

My recommendation regarding this draft, to the people inside Apple who implement customer-edge router functions, is to ignore it.  It is too late to add the shared transition space to the list of special-use addresses excluded from use as 6to4 tunnel endpoints in all the units already deployed in the field.  Such a disruption to existing customer configurations is generally unacceptable behavior for software updates.  Also, while it might seem reasonable to add the new space to the list of special-use addresses only in *forthcoming* products that support a 6to4 tunnel router feature, that too is unlikely ever to happen. (Note well: we don't comment publicly about the features of unreleased products.)

Shorter james: this draft is a bad idea; please don't publish it.


--
james woodyatt <[e-mail]>
member of technical staff, core os networking