Dear RFC 3901 authors and dnsop WG,
I would like to update RFC 3901 DNS IPv6 Transport Operational Guidelines.
Now, IPv6 is now just as important as IPv4 and easy to use.
Current RFC 3901 prefers IPv4.
I would like to propose the following changes to RFC 3901 section 4.
# Other sections may require some updates.
When the following proposal will become a new BCP, and even if it is
implemented in the world, it will not adversely affect name resolution
of existing IPv4 only zones and IPv4 only recursive resolvers.
# The recursive resolver that implement
# draft-momoka-v6ops-ipv6-only-resolver-00 is a dual stack resolver.
----------------------------------------
Title: DNS IPv6 Transport Operational Guidelines
^^^^remove
4. DNS IPv6 Transport recommended Guidelines
^^^^
remove
In order to preserve name space continuity, the following
administrative policies are recommended:
- every recursive name server SHOULD be either IPv4-only or dual
stack, ^^^^^^^^^^^^^^^^^^^
remove
This rules out IPv6-only recursive servers. However, one might
^^^^^^^^^
IPv4-only or IPv6-only
design configurations where a chain of IPv6-only name server
^^^^^^^^^
IPv4-only or IPv6 only
forward queries to a set of dual stack recursive name server
actually performing those recursive queries.
- every DNS zone SHOULD be served by at least one IPv4-reachable
authoritative name server.
^
add new text
"and at least one IPv6-reachable authoriatative name server"
This rules out DNS zones served only by IPv6-only authoritative
name servers.
^add new test
"or IPv4-only authoriatative name servers"
Note: zone validation processes SHOULD ensure that there is at least
one IPv4 address record available for the name servers of any child
^add new test
"and at least one IPv6 address record"
delegations within the zone.
--------------------
As a result, section 4 of RFC 3901 will be the following.
----------------------------------------
New Title: DNS Transport Operational Guidelines
4. DNS Transport recommended Guidelines
In order to preserve name space continuity, the following
administrative policies are recommended:
- every recursive name server SHOULD be dual stack.
This rules out IPv4-only or IPv6-only recursive servers.
However, one might design configurations where a chain of
IPv4-only or IPv6 only name server forward queries to a set
of dual stack recursive name server actually performing those
recursive queries.
- every DNS zone SHOULD be served by at least one IPv4-reachable
authoritative name server and at least one IPv6-reachable
authoriatative name server.
This rules out DNS zones served only by IPv6-only
authoritative name servers or IPv4-only authoriatative name
servers.
Note: zone validation processes SHOULD ensure that there are at
least one IPv4 address record and at least one IPv6 address record
available for the name servers of any child delegations within the
zone.
--------------------
--
Kazunori Fujiwara, JPRS <fujiw...@jprs.co.jp>
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