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Large Responses to DNS Queries (DNS MORE)

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Paul A. Vixie , Mark P. Andrews
Last updated 1996-07-17 (Latest revision 1996-07-08)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


DNS messages are limited to 64 kilobytes in size. At times it is necessary to send a message that is greater that 64 kilobytes. This is currently not possible. AXFR is the one exception. This document describes how to send a sequence of messages, the total length which may be greater than 64 kilobytes, by extending the protocol. In addition average message sizes are increasing and the 512 byte payload limit for UDP is now too small. This document describes how servers can identify when they can send bigger messages without necessarily resorting to TCP.


Paul A. Vixie
Mark P. Andrews

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)