A new Request for Comments is now available in online RFC libraries.
RFC 5001
Title: DNS Name Server Identifier (NSID)
Option
Author: R. Austein
Status: Standards Track
Date: August 2007
Mailbox: sra@isc.org
Pages: 11
Characters: 23754
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-dnsext-nsid-02.txt
URL: http://www.rfc-editor.org/rfc/rfc5001.txt
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. While existing ad-hoc
mechanisms allow an operator to send follow-up queries when it is
necessary to debug such a configuration, the only completely reliable
way to obtain the identity of the name server that responded is to
have the name server include this information in the response itself.
This note defines a protocol extension to support this functionality.
[STANDARDS TRACK]
This document is a product of the DNS Extensions
Working Group of the IETF.
This is now a Proposed Standard Protocol.
STANDARDS TRACK: This document specifies an Internet standards track
protocol for the Internet community,and requests discussion and suggestions
for improvements.Please refer to the current edition of the Internet
Official Protocol Standards (STD 1) for the standardization state and
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