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

Figure 7 Network Entities, Portals and Nodes
• Portal Groups - a set of network portals within a network entity that share network connections
and can collectively coordinate an iSCSI session.
• Target Portal Group (TPG) - Although iSCSI initiators and iSCSI targets use portal groups to
coordinate iSCSI sessions, only target portal groups are used directly in the iSCSI protocol.
• Target Portal Group Tag (TPGT) - iSCSI portal groups that are associated with target nodes
are identified by a numerical target portal group tag ranging from 0 to 65535.
• Target Session Identifying Handle (TSIH) - a tag generated by an iSCSI target to identify an
iSCSI session with a specific iSCSI initiator. The TSIH is generated during session establishment.
Figure 8 shows an iSCSI Target sharing two Target Portal Groups to conduct multiple iSCSI sessions.
Figure 8 iSCSI Target Sharing Two Target Portal Groups
10 iSCSI Overview