HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.2 administrator guide (5697-0 - Page 303

14 iSCSI gateway service iSCSI gateway service overview This chapter describes the HP StorageWorks B-Series iSCSI Director Blade gateway service. The iSCSI gateway service is supported only on the HP StorageWorks 4/256 SAN Director running Fabric OS 5.2.0 or later with one or more iSCSI-enabled HP StorageWorks B-Series iSCSI Director Blade. The HP StorageWorks B-Series iSCSI Director Blade gateway service is an intermediate device in the network, allowing iSCSI initiators in an IP SAN to access and utilize storage in a Fibre Channel (FC) SAN as shown in Figure 32. iS CS I i n i ti a to r FC 4-16IP iS C S I gateway F C target 1 IP network SAN L UNs Figure 32 iSCSI gateway network L UNs F C target 2 The iSCSI gateway network provides the following services to the iSCSI initiators: • Access to the fabric using virtual FC devices (iSCSI virtual initiator) • Support for target registration to an iSCSI Name Server (iSNS) for discovery • iSCSI initiator access control management using discovery domains and a discovery domain set • Session management, such as session tracking and performance monitoring • Session authentication using CHAP NOTE: The HP StorageWorks B-Series iSCSI Director Blade gateway service is not compatible with other iSCSI gateway platforms, including Brocade iSCSI Gateway or the Brocade Multiprotocol Router. iSCSI session translation The iSCSI gateway enables applications on an IP network to use an iSCSI initiator to connect to FC targets. The iSCSI gateway translates iSCSI protocol to Fibre Channel Protocol (FCP), bridging the IP network and FC SAN. Figure 33 shows a basic implementation. iS CS I i n i ti a to r IP network F C 4-16IP iS C S I gateway IP p o r ta l FC p o r ta l FC target 1 SAN L UNs iS C S I virtual target (V T ) IP iS C S I virtual initiator (V I) FC L UNs FC target 2 Figure 33 iSCSI gateway service basic implementation The HP StorageWorks B-Series iSCSI Director Blade acts as an iSCSI gateway between FC-attached targets and iSCSI initiators. On the iSCSI initiator, iSCSI is mapped between the SCSI driver and the TCP/IP stack. Fabric OS 6.2 administrator guide 301