DHCP Options for Service Location Protocol
RFC 2610
| Document | Type |
RFC - Proposed Standard
(June 1999; No errata)
Was draft-ietf-dhc-slp (dhc WG)
|
|
|---|---|---|---|
| Authors | Erik Guttman , Charles Perkins | ||
| Last updated | 2013-03-02 | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 2610 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | (None) | ||
| Send notices to | (None) | ||
Network Working Group C. Perkins
Request for Comments: 2610 E. Guttman
Category: Standards Track Sun Microsystems
June 1999
DHCP Options for Service Location Protocol
Status of this Memo
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 status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (1999). All Rights Reserved.
Abstract
The Dynamic Host Configuration Protocol provides a framework for
passing configuration information to hosts on a TCP/IP network.
Entities using the Service Location Protocol need to find out the
address of Directory Agents in order to transact messages. Another
option provides an assignment of scope for configuration of SLP User
and Service Agents.
1. Introduction
The Dynamic Host Configuration Protocol [2] provides a framework for
passing configuration information to hosts on a TCP/IP network.
Entities using the Service Location Protocol, Version 2 [3] and
Service Location Protocol, Version 1 [4] need to obtain the address
of Directory Agents and Scope configuration. The Service Location
Protocol (SLP) provides a default configuration for Scopes and
Directory Agents may be discovered using multicast or broadcast. It
is useful in a larger deployment to be able to configure SLP Agents
using DHCP, so as to centralize the administration and to deploy SLP
in networks where multicast routing is not available.
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [1].
Perkins & Guttman Standards Track [Page 1]
RFC 2610 DHCP Options for Service Location Protocol June 1999
2. Introduction
The DHCP options described below are used to configure Agents using
the Service Location Protocol, Version 2 [3] and Version 1 [4].
The SLP Directory Agent option is used to configure User Agents and
Service Agents with the location of Directory Agents in the network.
The SLP Scope Option takes precedence over both default and static
scope configuration of SLP agents.
3. SLP Directory Agent Option
This option specifies the location of one or more SLP Directory
Agents.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Code = 78 | Length | Mandatory | a1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| a2 | a3 | a4 | ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
The SLP Directory Agent Option specifies a list of IP addresses for
Directory Agents. Directory Agents MUST be listed in order of
preference, if there is an order of preference.
The Length value must include one for the 'Mandatory' byte and
include four for each Directory Agent address which follows. Thus,
the Length minus one of the option MUST always be divisible by 4 and
has a minimum value of 5.
The address of the Directory Agent is given in network byte order.
The 'Mandatory' byte in the Directory Agent option may be set to
either 0 or 1. If it is set to 1, the SLP User Agent or Service
Agent so configured MUST NOT employ either active or passive
multicast discovery of Directory Agents.
Note that for backward compatibility with some deployed software the
Mandatory byte MUST NOT be set to any byte value for which the high
order bit (0x80) is set.
The Directory Agents listed in this option MUST be configured with
the a non-empty subset of the scope list that the Agent receiving the
Directory Agent Option is configured with. See the notes below.
Perkins & Guttman Standards Track [Page 2]
RFC 2610 DHCP Options for Service Location Protocol June 1999
The SLPv2 specification [3] defines how to use this option.
4. SLP Service Scope Option
The scope list is a comma delimited list which indicates the scopes
that a SLP Agent is configured to use.
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Code = 79 | Length | Mandatory | <Scope List>...
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