Overview" On - HP StorageWorks SR2122 User Manual

Software Overview
Access for SCSI routing is controlled in the IP hosts and the storage router. In an
IP host, the Gigabit Ethernet IP address of the SCSI routing instance in the storage
router with which the host is to transport SCSI requests and responses is
configured in the iSCSI driver. In a storage router, access is controlled through an
access list and a VLAN identifier (VID) number of the hosts. Additionally, access
can be further controlled in the storage router through authentication. See
"Authentication
An access list enables access to storage devices attached to the storage router with
any combination of host IP address(es), CHAP user name(s), or iSCSI name(s).
An access list contains these combinations. Host VID enables access to storage
devices according to the VID of each host. See
page 75 for more information about VLAN access.
For each iSCSI target you can associate one access list allowing read/write access,
and one access list allowing read-only access. See
Routing"
You can use a combination of access lists and VIDs to configure access in the
storage router; that is, you can specify that certain hosts according to IP address in
a VLAN can access storage devices attached to the storage router.
Once the access is configured in the hosts and the storage router, and once the
storage mapping is configured in the storage router, the storage router routes SCSI
requests and responses between hosts and the mapped storage devices.
Figure 35
routing. In the figure, the SR2122-2 provides three IP hosts with IP access to disk
drives across four disk controllers. The storage router contains two SCSI routing
instances: one configured with IP address 10.1.2.3 for the Gigabit Ethernet
interface and the other with IP address 10.1.2.4. The iSCSI drivers in each IP host
are configured to access those SCSI routing instances by their IP addresses
through the Gigabit Ethernet interface. An access list in the storage router or VID
(or both) specifies that hosts A, B, and C are allowed to access the mapped storage
devices. From the perspective of a host, each disk drive mapped to it appears as a
locally attached disk drive.
and/or VID, the Gigabit Ethernet IP addresses of the SCSI routing instances, and
the storage device mapping.
66
Overview" on page 78 for more information about authentication.
for more information about read/write and read-only access.
represents the concept of storage mapping and access control for SCSI
Table 7
"VLAN Access
Chapter 8, "Configuring SCSI
shows the correlation between an access list
IP Storage Router SR2122-2 User Guide

Overview" on