Chapter 42 Configuring Iscsi - HP Cisco MDS 9020 - Fabric Switch Configuration Manual

About iSCSI
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
The iSCSI feature consists of routing iSCSI requests and responses between iSCSI hosts in an IP
network and Fibre Channel storage devices in the Fibre Channel SAN that are accessible from any Fibre
Channel interface of the Cisco MDS 9000 Family switch (see
Figure 42-1
IP host A
iscsi
Each iSCSI host that requires access to storage through the IPS module or MPS-14/2 module needs to
have a compatible iSCSI driver installed. (The Cisco.com website at
http://www.cisco.com/cgi-bin/tablebuild.pl/sn5420-scsi
iSCSI protocol, the iSCSI driver allows an iSCSI host to transport SCSI requests and responses over an
IP network. From the host operating system perspective, the iSCSI driver appears to be a SCSI transport
driver similar to a Fibre Channel driver in the host.
The IPS module or MPS-14/2 module provides transparent SCSI routing. IP hosts using the iSCSI
protocol can transparently access targets on the Fibre Channel network.
of a typical configuration of iSCSI hosts connected to an IPS module or MPS-14/2 module through the
IP network access Fibre Channel storage on the Fibre Channel SAN.
The IPS module or MPS-14/2 module create a separate iSCSI SAN view and Fibre Channel SAN view.
For the iSCSI SAN view, the IPS module or MPS-14/2 module creates iSCSI virtual targets and then
maps them to physical Fibre Channel targets available in the Fibre Channel SAN. They present the Fibre
Channel targets to IP hosts as if the physical iSCSI targets were attached to the IP network (see
Figure
Figure 42-2
iSCSI iSCSI
Cisco MDS 9000 Family CLI Configuration Guide
42-2
Transporting iSCSI Requests and Responses for Transparent iSCSI Routing
IP
network
A
Transporting iSCSI requests
and responses over an IP
network
Routing SCSI requests
and responses
(Through the IPS module)
42-2).
iSCSI SAN View—iSCSI virtual targets
MDS
IP
Network
Virtual iSCSI
Target T-3
Switch 1
Fibre
Channel
SAN
C
Transporting FCP requests
and responses between a Cisco
MDS switch and a storage array
B
provides a list of compatible drivers.) Using the
Fibre
Channel
SAN
Target T-3
Chapter 42 Configuring iSCSI
Figure 42-1).
Intelligent
storage array
Figure 42-1 provides an example
OL-16184-01, Cisco MDS SAN-OS Release 3.x