Erik Kline has entered the following ballot position for
draft-ietf-dnsop-3901bis-10: No Objection

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COMMENT:
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# Internet AD comments for draft-ietf-dnsop-3901bis-10
CC @ekline

* comment syntax:
  - https://github.com/mnot/ietf-comments/blob/main/format.md

* "Handling Ballot Positions":
  - https://ietf.org/about/groups/iesg/statements/handling-ballot-positions/

## Comments

### S4.1

* "IPv4-converted IPv6 addresses"

  As Geoff Huston pointed out, this is not a formal term.  I recommend
  adopting his suggested alternative:

  "Authoritative DNS servers SHOULD NOT use IPv4-Compatible IPv6 Addresses
  and IPv4-Mapped IPv6 Address [RFC4291]".

### S4.2

* Geoff highlights some concerns with recurser forwarding and the lack of
  a protocol-based mechanism for loop avoidance or loop termination.

  One possibility here might be to say that recursers SHOULD NOT forward
  to other recursers in the manner described unless the operator can be
  sure that no loops can ever formed (the means by which this is to be
  done would, of course, be outside the scope of this document). Operators
  choosing to employ this kind of recurser forwarding may open their
  infrastructure to denial of resource attacks.

## Nits

### S1

* If you're going to reach for an early IPv6 RFC then 2460 itself was
  replacing 1883 (1998 vs 1995).



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