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With the increased use of DNS anycast, load balancing, and other mechanisms
allowing more than one DNS name server to share a single IP address, it is sometimes difficult
to tell which of a pool of name servers has answered a particular query. A standardized mechanism
to determine the identity of a name server responding to a particular query would be useful, particularly
as a diagnostic aid for administrators. Existing ad hoc mechanisms for addressing this need have some shortcomings,
not the least of which is the lack of prior analysis of exactly how such a mechanism
should be designed and deployed. This document describes the existing convention
used in some widely deployed implementations of the DNS protocol, including advantages
and disadvantages, and discusses some attributes of an improved mechanism.
This memo provides information for the Internet community.
David Conrad <firstname.lastname@example.org>
Suzanne Woolf <email@example.com>
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid)