HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.1.x administrator guide (5697 - Page 253

DDS et 1 iS C S I virtual targets (V T s ) DD1 iS C S I initiator A VT 1 IP network VT 2 iS C S I initiator B DD2 VT 3 iS C S I gateway s ervic e Figure 21 Discovery domain set configuration example Switch-to-iSCSI initiator authentication iSCSI sessions are authenticated using CHAP (Challenge Handshake Authentication Protocol). The iSCSI gateway service supports the following three strategies for CHAP authentication: • One-way-Only the iSCSI VT authenticates the session. • Mutual-Both the iSCSI initiator and the iSCSI VT authenticate the session. • Binding user names-Specific user names can be bound to an iSCSI VT. Only those user names can be used for authentication during iSCSI login. NOTE: iSCSI gateway service does not support IPSec. Load balancing through connection redirection Connection redirection allows iSCSI sessions to be evenly distributed across ports on the same blade. Before the maximum number of connections is reached for any given port, logins are redirected to the next available port, resulting in an even distribution of sessions. This distribution occurs only during the first login phase. Existing connections are not redistributed when iSCSI ports change state from disabled to enabled or offline to online. Connection redirection does not need to be committed as a configuration parameter. It is independently enabled and disabled. Fabric OS 6.1.x administrator guide 253