HP StorageWorks 4000/6000/8000 .HP StorageWorks SAN Design Reference Guide, Pa - Page 357

• iSCSI initiator (IP host)-A system that starts the exchange of information with an iSCSI target. IP hosts access the iSCSI target storage systems as if they were directly attached. iSCSI naming iSCSI nodes are uniquely named devices (initiators or targets). The nodes have an IP address, TCP port, and iSCSI name. The iSCSI name can be up to 255 characters in length. Figure 126 shows an iSCSI node definition in the context of an IP network. IP Network = Network Entity iSCSI Node (IP device with IP address) iSCSI Name (up to 255 characters, using either EQN or EUI naming scheme) Network Portal (IP address and TCP port number) iSCSI Device (host or storage device) iSCSI Node iSCSI Node 25161a Figure 126 iSCSI node definition . The iSCSI name is independent of the network portal and provides a unique and consistent identity for an iSCSI node. Although moving a device to another network segment changes its network portal, the iSCSI name is unchanged and allows the device to be rediscovered. An iSCSI name is independent of supporting hardware. You can assign an iSCSI name to a device driver on a host, even if the device driver accesses the network through multiple NICs. A storage device with multiple connections to the network is also identified by its iSCSI name. iSCSI naming provides permanent and unique identities for iSCSI nodes. The two naming schemes are as follows: • IQN • EUI An iSCSI node address consists of the IP address, TCP port number, and IQN or EUI. iSCSI nodes acquire IP addresses with standard IP services. Discovery mechanisms This section describes the mechanisms you can use for discovery requests. Static configuration With static configuration, an administrator manually sets the target addresses for the initiators. The statically configured addresses for the targets persist across initiator reboots. Static configuration is recommended for the smallest iSCSI SANs. SAN Design Reference Guide 357