The IPv4 Dynamic Host Configuration Protocol (DHCP) Option for the Internet Storage Name Service
RFC 4174
Document | Type |
RFC - Proposed Standard
(September 2005; No errata)
Updated by RFC 7146
|
|
---|---|---|---|
Last updated | 2013-03-02 | ||
Stream | IETF | ||
Formats | plain text pdf html bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 4174 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Thomas Narten | ||
Send notices to | <rdroms@cisco.com>,Black_David@emc.com, elizabeth.rodriguez@dothill.com |
Network Working Group C. Monia Request for Comments: 4174 Consultant Category: Standards Track J. Tseng Riverbed Technology K. Gibbons McDATA Corporation September 2005 The IPv4 Dynamic Host Configuration Protocol (DHCP) Option for the Internet Storage Name Service 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 (2005). Abstract This document describes the Dynamic Host Configuration Protocol (DHCP) option to allow Internet Storage Name Service (iSNS) clients to discover the location of the iSNS server automatically through the use of DHCP for IPv4. iSNS provides discovery and management capabilities for Internet SCSI (iSCSI) and Internet Fibre Channel Protocol (iFCP) storage devices in an enterprise-scale IP storage network. iSNS provides intelligent storage management services comparable to those found in Fibre Channel networks, allowing a commodity IP network to function in a similar capacity to that of a storage area network. Table of Contents 1. Introduction ................................................. 2 1.1. Conventions Used in This Document ...................... 2 2. iSNS Option for DHCP ......................................... 3 2.1. iSNS Functions Field ................................... 5 2.2. Discovery Domain Access Field .......................... 6 2.3. Administrative Flags Field ............................. 7 2.4. iSNS Server Security Bitmap ............................ 8 3. Security Considerations ...................................... 9 4. IANA Considerations .......................................... 11 Monia, et al. Standards Track [Page 1] RFC 4174 DHCP Option Number for iSNS September 2005 5. Normative References ......................................... 11 6. Informative References ....................................... 11 1. Introduction The Dynamic Host Configuration Protocol for IPv4 provides a framework for passing configuration information to hosts. Its usefulness extends to hosts and devices using the iSCSI and iFCP protocols to connect to block level storage assets over a TCP/IP network. The iSNS Protocol provides a framework for automated discovery, management, and configuration of iSCSI and iFCP devices on a TCP/IP network. It provides functionality similar to that found on Fibre Channel networks, except that iSNS works within the context of an IP network. iSNS thereby provides the requisite storage intelligence to IP networks that are standard on existing Fibre Channel networks. Existing DHCP options cannot be used to find iSNS servers for the following reasons: a) iSNS functionality is distinctly different from other protocols using DHCP options. Specifically, iSNS provides a significant superset of capabilities compared to typical name resolution protocols such as DNS. It is designed to support client devices that allow themselves to be configured and managed from a central iSNS server. b) iSNS requires a DHCP option format that provides more than the location of the iSNS server. The DHCP option has to specify the subset of iSNS services that may be actively used by the iSNS client. The DHCP option number for iSNS is used by iSCSI and iFCP devices to discover the location and role of the iSNS server. The DHCP option number assigned for iSNS by IANA is 83. 1.1. Conventions Used in This Document iSNS refers to the Internet Storage Name Service framework, which consists of the storage network model and associated services. 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 [RFC2119]. All frame formats are in big-endian network byte order. RESERVED fields SHOULD be set to zero. Monia, et al. Standards Track [Page 2] RFC 4174 DHCP Option Number for iSNS September 2005 This document uses the following terms: "iSNS Client" - iSNS clients are processes resident in iSCSI andShow full document text