HP StorageWorks IP Storage Router - Manual (Page 229)

Recommended Host/Storage Configurations
229 IP Storage Router SR2122-2 User Guide
FCIP with Local iSCSI Hosts
One or more host servers may be connected to the extended SAN through a local
IP network at site A using the iSCSI protocol. This connection is shown in
Figure 56 using the second Gigabit Ethernet port on the site A SR2122-2.
Figure 56: FCIP with local iSCSI hosts
For this configuration, shown in Figure 56 , two connections from the SR2122-2 to
the Fibre Channel network at site A are required. One SR2122-2 Gigabit Ethernet
(Fibre Channel) port is assigned to the FCIP connection and the second is
designated for the iSCSI connection.
Disk LUNs at site A may be assigned to the iSCSI hosts. The SR2122-2 translates
the iSCSI I/O commands into Fibre Channel protocol commands.
The iSCSI hosts at site A are also able to access the disk LUNs at site B. The
iSCSI protocol I/O commands are converted to FCIP protocol in the site A
SR2122-2 and transmitted to site B using FCIP. The iSCSI host applications must
be able to tolerate the total latency incurred through the multiple protocol
conversions plus the overall network delay to access disk LUNs at site B.
A further expansion of this configuration would be to mirror the site A iSCSI
configuration to include iSCSI hosts at site B. This would provide access to site B
disk LUNs, as well as site A disk LUNs, through the SR2122-2 at site B.
FC disk A FC disk B
FC tape A FC tape B
WAN network
(FCIP)
FC network A FC network B
IP network
(iSCSI)
FC Host A
HP SR2122-2 A HP SR2122-2 B
FC Host B iSCSI Host
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