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Cisco SN 5428-2 Storage Router Software Configuration Guide
OL-4691-01
Chapter 1 Before Configuring SN 5428-2 Storage Router Software
Transparent SCSI Routing Overview
Transparent SCSI Routing Overview
Transparent SCSI routing provides IP hosts with access to intelligent storage arrays as if each storage
array were directly attached to the hosts, with access to the storage devices managed primarily in each
storage array. The SN 5428-2 transparently presents each IP host to the storage array as if each host were
an FC host.
Typically, transparent SCSI routing is used with an intelligent storage array that is directly connected to
the SN 5428-2 Fibre Channel interface. Managing access to storage devices consists of using
configuration tools available with an intelligent storage array (to configure, for example, which hosts are
granted access and to configure multiple paths between hosts and storage devices). With transparent
SCSI routing, an intelligent storage array can manage each IP host as if it were directly attached to the
array as an FC host.
Transparent SCSI routing automatically creates iSCSI targets and maps them to physical targets
available in the intelligent storage array. The storage router presents the iSCSI targets to IP hosts as if
the physical targets were directly attached to the hosts. In conjunction with presenting iSCSI targets to
hosts, transparent SCSI routing presents each IP host as an FC host to the intelligent storage array. The
intelligent storage array is aware of each IP host and responds to each IP host as if it were an FC host
connected to the storage array. (See Figure 1-9.) Transparent SCSI routing can present no more than 62
IP hosts as FC hosts to an intelligent storage array.
Figure 1-9 Transparent SCSI Routing Overview
To configure an SN 5428-2 Storage Router that is deployed for transparent SCSI routing, you should
have a basic understanding of the following concepts:
• Routing SCSI Requests and Responses, page 1-11
• Basic Network Structure, page 1-12
• Transparent SCSI Routing Mapping and Access Control, page 1-12
• Available Instances of Transparent SCSI Routing, page 1-15
IP hosts
An IP host accesses
a target made available
by a storage array as if
the IP host were an FC
host directly attached
to the storage array.
IP
Cisco SN 5428-2
85727
Intelligent storage
array
FC