Cisco MDS 9000 series Configuration Manual page 75

Chapter 4 Configuring 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
For the Fibre Channel SAN view, the IPS module or MPS-14/2 module presents iSCSI hosts as a virtual
Fibre Channel host. The storage devices communicate with the virtual Fibre Channel host similar to
communications performed with real Fibre Channel hosts (see
Figure 4-3
iSCSI iSCSI
host A
The IPS modules or MPS-14/2 modules transparently map the command between the iSCSI virtual target
and the virtual Fibre Channel host (see
Figure 4-4
IP host A
iSCSI iSCSI
iqn.host A
Routing SCSI from the IP host to the Fibre Channel storage device consists of the following main
actions:
•
•
•
Note FCP (the Fibre Channel equivalent of iSCSI) carries SCSI commands over a Fibre Channel SAN.
Refer to the IETF standards for IP storage at
OL-19525-01,Cisco MDS NX-OS Release 4.2(1)
Fibre Channel SAN View—iSCSHI Host as an HBA
MDS
IP
Network
iSCSI to FCP (Fibre Channel) Routing
IP Network
iSCSI
Session
The iSCSI requests and responses are transported over an IP network between the hosts and the IPS
module or MPS-14/2 module.
The SCSI requests and responses are routed between the hosts on an IP network and the Fibre
Channel storage device (converting iSCSI to FCP and vice versa). The IPS module or MPS-14/2
module performs this conversion and routing.
The FCP requests or responses are transported between the IPS module or MPS-14/2 module and
the Fibre Channel storage devices.
Fibre
Channel
FC
SAN
Virtual
FC host A
Figure 4-4).
MDS
iSCSI to FCP(FC) routing
FC virtual
iSCSI Virtual
host pwwn-A
Target iqn.T1
SCSI Routing
http://www.ietf.org
Cisco MDS 9000 Family NX-OS IP Services Configuration Guide
Figure 4-3).
Target T-3
FC
Session
iSCSI iSCSI
FC Target T1
pwwn-T1
for information on the iSCSI protocol.
About iSCSI
4-3