Internet-Draft NIST
Updates: 2672,3363,4294 W. Wijngaards
(if approved) NLnet Labs
-Intended status: Standards Track January 14, 2008
-Expires: July 17, 2008
+Intended status: Standards Track February 5, 2008
+Expires: August 8, 2008
Update to DNAME Redirection in the DNS
- draft-ietf-dnsext-rfc2672bis-dname-08
+ draft-ietf-dnsext-rfc2672bis-dname-09
Status of This Memo
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html.
- This Internet-Draft will expire on July 17, 2008.
+ This Internet-Draft will expire on August 8, 2008.
Copyright Notice
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Requirements Language
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1. Introduction
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The format of the DNAME record has not changed from the original
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Table 1. DNAME Substitution Examples.
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name. The owner name of a DNAME can only have one DNAME RR, and no
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3.2. CNAME synthesis
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older data TTL times out.
- DNS Caches MUST perform CNAME synthesis on behalf of DNAME-ignorant
- clients. A DNS Cache that understands DNAMEs can send out queries on
+ DNS caches MUST perform CNAME synthesis on behalf of DNAME-ignorant
+ clients. A DNS cache that understands DNAMEs can send out queries on
behalf of clients with the UD bit set. After receiving the answers
- the DNS Cache sends replies to DNAME ignorant clients that include
+ the DNS cache sends replies to DNAME ignorant clients that include
DNAMEs and synthesized CNAMEs.
3.4. Server algorithm
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C. If at some label, a match is impossible (i.e., the
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Note that there will be at most one ancestor with a DNAME as
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In [RFC4294], the reference to DNAME was left in as an editorial
that would add a record or delegation with a name existing under a
DNAME.
- A server MUST return an error message with RCODE=REFUSED [RFC2136] in
- response to a dynamic update message that would add a resource record
- under a DNAME in the zone.
+ A server MUST return an error message with RCODE=YXDOMAIN [RFC2136]
+ in response to a dynamic update message that would add a resource
+ record under a DNAME in the zone. This is similar to a dynamic
+ update request to add a resource record under a delegation NS in a
+ zone.
-
-
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5.3. DNSSEC and DNAME
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;; Header: QR AA DO RCODE=0(NOERROR)
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- type.
+ type. The authors would also like to acknowledge Paul Vixie, Ed
+ Lewis, Mark Andrews, Mike StJohns and Niall O'Reilly for their review
+ and comments on this document.
9. References
Errors", RFC 1912, February 1996.
[RFC3363] Bush, R., Durand, A., Fink, B., Gudmundsson, O., and T.
- Hain, "Representing Internet Protocol version 6 (IPv6)
- Addresses in the Domain Name System (DNS)", RFC 3363,
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+ Hain, "Representing Internet Protocol version 6 (IPv6)
+ Addresses in the Domain Name System (DNS)", RFC 3363,
August 2002.
[RFC4294] Loughney, J., "IPv6 Node Requirements", RFC 4294,
-
-
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Full Copyright Statement
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