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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
Routing SCSI Requests and Responses
Transparent SCSI routing consists of routing SCSI requests and responses between hosts in an IP
network and an intelligent storage array that is directly connected to an SN 5428-2 Fibre Channel
interface. (See Figure 1-10.)
Figure 1-10 Routing SCSI Requests and Responses for Transparent SCSI Routing
Each host that requires IP access to storage via an SN 5428-2 Storage Router needs to have a compatible
iSCSI driver installed. Using the iSCSI protocol, the iSCSI driver allows an IP host to transport SCSI
requests and responses over an IP network. From the perspective of a host operating system, the iSCSI
drive appears to be a locally attached SCSI or Fibre Channel drive to the host. From the perspective of
the storage array, each IP host appears as an FC host (with one Fibre Channel address for each host).
Transparent SCSI routing consists of the following main actions (Figure 1-11):
• Transporting SCSI requests and responses over an IP network between the hosts and the SN 5428-2
Storage Router.
• Routing SCSI requests and responses between hosts on an IP network and an intelligent storage
array.
• Transporting SCSI requests and responses between the SN 5428-2 Storage Router and an intelligent
storage array.
Figure 1-11 Transparent SCSI Routing Actions
IP hosts
IP
Cisco SN 5428-2
85728
SCSI requests and responses
FC
Intelligent storage
array
IP hosts
IP
Cisco SN 5428-2
85729
Transporting SCSI
requests and responses
over an IP network
Transporting SCSI
requests and responses
between an SN 5428-2
and a storage array
Routing SCSI requests
and responses
Intelligent storage
array
FC