What name format is used to specify the iSCSI targets that are permitted to connect to an iSCSI initiator?
Show Network Working Group M. Bakke
Request for Comments: 3721 Cisco
Category: Informational J. Hafner
J. Hufferd
K. Voruganti
IBM
M. Krueger
Hewlett-Packard
April 2004
Internet Small Computer Systems Interface (iSCSI)
Naming and Discovery
Status of this Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2004). All Rights Reserved.
Abstract
This document provides examples of the Internet Small Computer
Systems Interface (iSCSI; or SCSI over TCP) name construction and
discussion of discovery of iSCSI resources (targets) by iSCSI
initiators. This document complements the iSCSI protocol document.
Flexibility is the key guiding principle behind this document. That
is, an effort has been made to satisfy the needs of both small
isolated environments, as well as large environments requiring
secure/scalable solutions.
Bakke, et al. Informational [Page 1]
RFC 3721 iSCSI Naming and Discovery April 2004
Table of Contents
1. iSCSI Names and Addresses. . . . . . . . . . . . . . . . . . . 3
1.1. Constructing iSCSI names using the iqn. format . . . . . 5
1.2. Constructing iSCSI names using the eui. format . . . . . 8
2. iSCSI Alias. . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1. Purpose of an Alias. . . . . . . . . . . . . . . . . . . 8
2.2. Target Alias . . . . . . . . . . . . . . . . . . . . . . 9
2.3. Initiator Alias. . . . . . . . . . . . . . . . . . . . . 10
3. iSCSI Discovery. . . . . . . . . . . . . . . . . . . . . . . . 12
4. Security Considerations. . . . . . . . . . . . . . . . . . . . 13
5. References . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1. Normative References . . . . . . . . . . . . . . . . . . 13
5.2. Informative References . . . . . . . . . . . . . . . . . 14
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 14
Appendix A: iSCSI Naming Notes. . . . . . . . . . . . . . . . . . 15
Appendix B: Interaction with Proxies and Firewalls. . . . . . . . 16
B.1. Port Redirector . . . . . . . . . . . . . . . . 16
B.2. SOCKS server. . . . . . . . . . . . . . . . . . 17
B.3. SCSI gateway. . . . . . . . . . . . . . . . . . 17
B.4. iSCSI Proxy . . . . . . . . . . . . . . . . . . 18
B.5. Stateful Inspection Firewall. . . . . . . . . . 18
Appendix C: iSCSI Names and Security Identifiers. . . . . . . . . 19
Authors' Addresses. . . . . . . . . . . . . . . . . . . . . . . . 21
Full Copyright Statement. . . . . . . . . . . . . . . . . . . . . 22
Bakke, et al. Informational [Page 2]
RFC 3721 iSCSI Naming and Discovery April 2004
1. iSCSI Names and Addresses
The main addressable, discoverable entity in iSCSI is an iSCSI Node.
An iSCSI node can be either an initiator, a target, or both. The
rules for constructing an iSCSI name are specified in [RFC3720].
This document provides examples of name construction that might be
used by a naming authority.
Both targets and initiators require names for the purpose of
identification, so that iSCSI storage resources can be managed
regardless of location (address). An iSCSI name is the unique
identifier for an iSCSI node, and is also the SCSI device name [SAM2]
of an iSCSI device. The iSCSI name is the principal object used in
authentication of targets to initiators and initiators to targets.
This name is also used to identify and manage iSCSI storage
resources.
Furthermore, iSCSI names are associated with iSCSI nodes instead of
with network adapter cards to ensure the free movement of network
HBAs between hosts without loss of SCSI state information
(reservations, mode page settings etc) and authorization
configuration.
An iSCSI node also has one or more addresses. An iSCSI address
specifies a single path to an iSCSI node and consists of the iSCSI
name, plus a transport (TCP) address which uses the following format:
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