draft-ietf-dhc-nsso-00.txt   draft-ietf-dhc-nsso-01.txt 
Network Working Group C. Smith Network Working Group C. Smith
Internet Draft Sun Microsystems, Inc. Internet Draft Sun Microsystems, Inc.
June 1999 October 1999
Expires December 1999 Expires April 2000
The Name Service Search Option for DHCP The Name Service Search Option for DHCP
<draft-ietf-dhc-nsso-00.txt> <draft-ietf-dhc-nsso-01.txt>
Status of this Memo Status of this Memo
This document is an Internet-Draft and is in full conformance with This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026. Internet-Drafts are working all provisions of Section 10 of RFC2026. Internet-Drafts are working
documents of the Internet Engineering Task Force (IETF), its areas, documents of the Internet Engineering Task Force (IETF), its areas,
and its working groups. Note that other groups may also distribute and its working groups. Note that other groups may also distribute
working documents as Internet-Drafts. working documents as Internet-Drafts.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
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Abstract Abstract
This document defines a new DHCP option which is passed from the DHCP
Server to the DHCP Client to specify the order in which name services
should be consulted when resolving hostnames and other information.
Introduction Introduction
The Dynamic Host Configuration Protocol (DHCP)[1] provides a The Dynamic Host Configuration Protocol (DHCP)[1] provides a
framework for passing configuration information to hosts on a TCP/IP framework for passing configuration information to hosts on a TCP/IP
network. RFC 2132 [2] allows DHCP servers to specify configuration network. RFC 2132 [2] allows DHCP servers to specify configuration
information for various kinds of name servers to be passed to DHCP information for various kinds of name servers to be passed to DHCP
clients. Many clients use multiple name services and have crafted clients. Many clients use multiple name services and have crafted
their own conventions that allow an individual host to express the their own conventions that allow an individual host to express the
order among the various name services with which lookups are done. order among the various name services with which lookups are done.
However, no search order can be specified via DHCP. The purpose of However, no search order can be specified via DHCP. The purpose of
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"DHCP client" "DHCP client"
DHCP client or "client" is an Internet host using DHCP to DHCP client or "client" is an Internet host using DHCP to
obtain configuration parameters such as a network address. obtain configuration parameters such as a network address.
"DHCP server" "DHCP server"
A DHCP server or "server" is an Internet host that returns A DHCP server or "server" is an Internet host that returns
configuration parameters to DHCP clients. configuration parameters to DHCP clients.
Domain Search Option Format Name Service Search Option Format
The code for this option is TBD, and its minimum length is 1 byte. A The code for this option is TBD, and its minimum length is 1 byte. A
DHCP server SHOULD return, in its preferred order, the integer option DHCP server SHOULD return, in its preferred order, the integer option
code for the name services (the earlier in the list, the more code for the name services (the earlier in the list, the more
preferred the name service). preferred the name service).
Code Len Name Service Search Order in Sequence Code Len Name Service Search Order in Sequence
+-------+-------+-------+--------+- +-------+-------+-------+--------+-
| TBD | n | ns1 | ns2 | ... | TBD | n | ns1 | ns2 | ...
+-------+-------+-------+--------+- +-------+-------+-------+--------+-
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