[ limiting my comments to the discussion surrounding section 4.1 ]

IFF ULA-C space is to exist and be registered/delegated, delegate the
reverse blocks for that space as well. we so often beat the "addressing
isn't routing" drum weekly. well, DNS isn't routing. DNS+ULA-C is not
an end-run around PIv6. DNS is an integral part of addressing and if
we're going to move forward with ULA-C as delegated addressing then let
us move forward with addressing in its entirety.

if organizations use a ULA-C block in their network, they shouldn't have
to special case their DNS infrastructure such that every recursive server
in their network has to slave from / forward to some special location
to get accurate answers like they do now for RFC1918 and ULA-L.

if different organizations end up routing ULA-C blocks between autonomous
networks they will already have the benefit of accurate PTR answers
without lifting a finger. resolution of a PTR record doesn't inch ULA-C
addresses any further towards being PI space, just towards adding value.

-- bill


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