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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
Mixed Mode Overview
Note For multiple paths between SANs, multiple pairs of systems deployed for FCIP need to be connected to
the FC hosts or FC devices. However, multiple SN 5428-2 Storage Routers deployed for FCIP cannot be
configured in an HA cluster. It is assumed that the multipath management is being done by an entity
outside the SN 5428-2s (for example, by management applications on the FC host or storage devices).
Figure 1-18 shows an alternative network structure for FCIP, in which FCIP tunnels are established from
two SANs aggregated to a central site. The SN 5428-2 at the central site has one FCIP instance set up
for SAN 1, and the other FCIP instance set up for SAN 2.
Figure 1-18 Multisite FCIP Configuration
Mixed Mode Overview
When the SN 5428-2 is deployed for SCSI routing or transparent SCSI routing, you can optionally
configure one of the internal FC initiator interfaces for FCIP. When it is deployed for FCIP, one of the
internal FC initiator interfaces can be configured for SCSI routing. This mixed mode deployment allows
the storage router to provide IP hosts with access to the FC storage via one initiator interface, and FCIP
connectivity for FC hosts and FC storage devices via the other initiator interface.
Figure 1-19 shows a storage router deployed for mixed mode, with one internal FC initiator interface
dedicated to SCSI routing and the other internal interface dedicated to FCIP.
Figure 1-20 shows a storage router deployed for mixed mode, with one internal FC initiator interface
dedicated to transparent SCSI routing and the other internal interface dedicated to FCIP.
When the storage router is deployed for mixed mode, all of the features and functionality of the primary
deployment mode (SCSI routing, transparent SCSI routing or FCIP), and the additional mode, are
available.
IP
SN 5428-2
SN 5428-2
91357
FC hosts and
storage devices
SAN 3
SN 5428-2
FC hosts and
storage devices
SAN 1
SAN 2