Specifications

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Cisco SN 5428-2 Storage Router Software Configuration Guide
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Chapter 1 Before Configuring SN 5428-2 Storage Router Software
FCIP Overview
Figure 1-16 shows a slightly more complex FCIP network: a redundant WAN FCIP configuration. In this
configuration, an FC host or FC device connects to one or more Fibre Channel interfaces of each peer
SN 5428-2 Storage Router deployed for FCIP, and each SN 5428-2 connects to two separate IP networks
through each of its Gigabit Ethernet interfaces. Through the IP network, each FCIP instance accesses the
peer storage router deployed for FCIP, connecting the SANs. In this configuration, IP A and IP B are
redundant paths, so that the loss of connectivity via either path does not cause a loss of connectivity
between the SANs.
Figure 1-16 FCIP Redundant WAN Configuration
Figure 1-17 shows an even more reliable FCIP configuration, in which pairs of SN 5428-2s provide full
redundancy. In this configuration, loss of an SN 5428-2 or loss of connectivity through one of the IP
networks can be tolerated with no loss of connectivity between the SANs.
Figure 1-17 FCIP Fully Redundant Configuration
Note For multiple paths between SANs, multiple pairs of SN 5428-2s 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.
SN 5428-2
SN 5428-2
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SAN 1
SAN 2
IP
B
IP
A
IP
A
SN 5428-2
deployed for FCIP
SN 5428-2
deployed for FCIP
SN 5428-2
deployed for FCIP
SN 5428-2
deployed for FCIP
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FC hosts and
storage devices
FC hosts and
storage devices
SAN 1
SAN 2
IP
B