<?xml version='1.0'?>

<reference anchor='RFC2136'>

<front>
<title abbrev='DNS Update'>Dynamic Updates in the Domain Name System (DNS UPDATE)</title>
<author initials='P.' surname='Vixie' fullname='Paul Vixie'>
<organization>Internet Software Consortium</organization>
<address>
<postal>
<street>Star Route Box 159A</street>
<street>Woodside</street>
<street>CA 94062</street></postal>
<phone>+1 415 747 0204</phone>
<email>paul@vix.com</email></address></author>
<author initials='S.' surname='Thomson' fullname='Susan Thomson'>
<organization>Bellcore</organization>
<address>
<postal>
<street>445 South Street</street>
<street>Morristown</street>
<street>NJ 07960</street></postal>
<phone>+1 201 829 4514</phone>
<email>set@thumper.bellcore.com</email></address></author>
<author initials='Y.' surname='Rekhter' fullname='Yakov Rekhter'>
<organization>Cisco Systems</organization>
<address>
<postal>
<street>170 West Tasman Drive</street>
<street>San Jose</street>
<street>CA 95134-1706</street></postal>
<phone>+1 914 528 0090</phone>
<email>yakov@cisco.com</email></address></author>
<author initials='J.' surname='Bound' fullname='Jim Bound'>
<organization>Digital Equipment Corp.</organization>
<address>
<postal>
<street>110 Spitbrook Rd ZK3-3/U14</street>
<street>Nashua</street>
<street>NH 03062-2698</street></postal>
<phone>+1 603 881 0400</phone>
<email>bound@zk3.dec.com</email></address></author>
<date month='April' year='1997' />
<area>Applications</area>
<keyword>domain name</keyword>
<keyword>domain name system</keyword>
<abstract>
<t>
   The Domain Name System was originally designed to support queries of
   a statically configured database.  While the data was expected to
   change, the frequency of those changes was expected to be fairly low,
   and all updates were made as external edits to a zone&apos;s Master File.
</t>
<t>
   Using this specification of the UPDATE opcode, it is possible to add
   or delete RRs or RRsets from a specified zone.  Prerequisites are
   specified separately from update operations, and can specify a
   dependency upon either the previous existence or nonexistence of an
   RRset, or the existence of a single RR.
</t>
<t>
   UPDATE is atomic, i.e., all prerequisites must be satisfied or else
   no update operations will take place.  There are no data dependent
   error conditions defined after the prerequisites have been met.
</t></abstract></front>

<seriesInfo name='RFC' value='2136' />
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</reference>
