On Thu, Feb 16, 2012 at 00:52, Livingood, Jason <
Jason_Livingood(_at_)cable(_dot_)comcast(_dot_)com> wrote:
To be more specific, at least section 5.5 ("it is unclear
how implementers will judge when the network conditions will have
changed sufficiently to justify turning off DNS Resolver Whitelisting
and/or what the process and timing will be for discontinuing this
practice") is now incorrect. It *is* clear, and it's what those
implementers are doing as part of World IPv6 Launch.
Does that make more sense?
As the author, if it helps I plan to make the following change to
Section 5.5 following the conclusion of IETF Last Call. I ran this by a few
folks already and it seems broadly acceptable (have not heard from Lorenzo
yet though).
Jason
*CURRENT 5.5: *
5.5. Turning Off DNS Resolver Whitelisting
Domains that choose to implement DNS Resolver Whitelisting generally
consider it to be a temporary measure. It is unclear how implementers will
judge when the network conditions will have changed sufficiently to justify
turning off DNS Resolver Whitelisting and/or what the process and timing
will be for discontinuing this practice, though the extent of IPv6
deployment to end users in networks, the state of IPv6-related impairment,
and the maturity of IPv6 operations are all clearly factors. However,
implementers may wish to take into consideration that, as a practical
matter, it will be impossible to get to a point where there are no longer
any IPv6-related impairments; some reasonably small number of hosts will
inevitably be left behind as end users elect not to upgrade them or as some
hosts are incapable of being upgraded.
*PROPOSED 5.5 (NEW TEXT IN ALL CAPS):*
5.5. Turning Off DNS Resolver Whitelisting
Domains that choose to implement DNS Resolver Whitelisting generally
consider it to be a temporary measure. It is unclear how implementers will
judge when the network conditions will have changed sufficiently to justify
turning off DNS Resolver Whitelisting and/or what the process and timing
will be for discontinuing this practice, though the extent of IPv6
deployment to end users in networks, the state of IPv6-related impairment,
and the maturity of IPv6 operations are all clearly factors. However, *SOME
IMPLEMENTERS HAVE ANNOUNCED THAT THEY PLAN TO PERMANENTLY TURN OFF
WHITELISTING BEGINNING ON WORLD IPV6 DAY IN JUNE 2012 [REFERENCE]. IN ANY
CASE*, implementers may wish to take into consideration that, as a
practical matter, it will be impossible to get to a point where there are
no longer any IPv6-related impairments; some reasonably small number of
hosts will inevitably be left behind as end users elect not to upgrade them
or as some hosts are incapable of being upgraded.
<eom>
I think the suggested change does not go far enough. The
"high-service-level domains" that prompted this draft to be written, and
all the implementers I'm currently aware of, are decommissioning the
practice.
So the paragraph that states, "It is unclear how implementers will judge
when the network conditions will have changed sufficiently to justify
turning off DNS Resolver Whitelisting and/or what the process and timing
will be for discontinuing this practice" is still incorrect. Can you just
remove the paragraph and start the section with "Many implementers have
announced that they plan to permanently turn off whitelisting beginning
on..." ?
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