[rfc-dist] RFC 5001 on DNS Name Server Identifier (NSID) Option

rfc-editor@rfc-editor.org rfc-editor at rfc-editor.org
Mon Aug 20 17:09:26 PDT 2007

A new Request for Comments is now available in online RFC libraries.

        RFC 5001

        Title:      DNS Name Server Identifier (NSID) 
        Author:     R. Austein
        Status:     Standards Track
        Date:       August 2007
        Mailbox:    sra at 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.  

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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