HP-UX iSCSI Software Initiator Support Guide (Edition 7)

• Challenge-Handshake Authentication Protocol (CHAP)
The iSCSI Software Initiator supports CHAP for target authentication of initiators and initiator
authentication of targets.
• Multiprocessor Compatible
The iSCSI Software Initiator is usable in a multi-processor environment.
• New Management Tool
The iSCSI Software Initiator introduces the “iscsiutil” management tool to the system. The
iscsiutil tool is installed with the iSCSI Software Initiator.
• Available Online
The iSCSI Software Initiator can be downloaded from the HP Software Depot and installed
using the Software Distributor (SD) installation software. See “System Startup” (page 36) for
details.
2.2 HP-UX iSCSI Software Initiator Components
The iSCSI Software Initiator has two kernel components:
• iSCSI Transport Driver: the session management and transport module.
• iSCSI Software Interface Driver: this module interfaces with the iSCSI Transport Driver and the
host based TCP/IP stack.
The iSCSI Software Initiator has four user space components:
• iswd: A connection management daemon. It opens and terminates connections for the iSCSI
Software Interface Driver.
• iscsi_resolvd: This daemon resolves addresses for the iSCSI Software Transport Driver. It
resolves host names, provided the domain name can be determined from the host name.
• islpd: This daemon is the SLP User Agent for iSCSI. It interfaces with the iSCSI Software
Transport Driver to update iSCSI persistent information with discovered iSCSI Targets.
• iradd: This daemon implements the interface between the iSCSI Software Transport driver and
a RADIUS server. It authenticates targets during iSCSI login using the Challenge Handshake
Authentication Protocol (CHAP).
NOTE: For more information on the iswd daemon, see “iSCSI Software Interface Driver Daemon
(iswd)” (page 38).
For more information on the iscsi_resolvd, islpd, and iradd daemons, see “iSCSI Software
Initiator Daemons” (page 30).
12 HP-UX iSCSI Software Initiator Product Overview