Error Record (ERR) for DNS

Document Type Expired Internet-Draft (dnsind WG)
Last updated 1997-07-30
Stream IETF
Intended RFC status (None)
Expired & archived
pdf htmlized bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The DNS protocol defines a 4-bit RCODE field in the header of the DNS envelope. This field is used to indicate the completion status of requests. Defined values exist to describe successful completion as well as a variety of error conditions that could result from DNS server operations. As DNS has been expanded to perform additional functions, the number of possible error conditions has increased significantly, and the field no longer has space for new error codes to be added. To address this problem, a new RR type is defined. The Error Record contains a machine-readable extended error value, as well as an optional human-readable ASCII text string. Additionally, it contains a domain-name source field to identify the entity generating the error condition. This RR may also be used in non- error conditions to provide extended information about server responses, such as security information on specific records in the response.


Ólafur Guðmundsson (
Robert Watson (

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