194
Highest
Availability
Campus
Configuration –
Recommended
NOTE The highest availability campus configuration is the recommended
configuration for the Synchronous Mirroring premium feature.
This configuration has two Fibre Channel switches at the primary site and two Fibre
Channel switches at the secondary site (four switches total), which provide for
complete failover and redundancy. Failures could involve Fibre Channel switches,
Fibre Channel cables, and any host or storage array. Two Fibre Channel switches at
each site also provide redundancy to the local site in addition to a fully redundant
remote configuration. No single point of failure exists in the hardware components.
The following figure shows the highest availability campus configuration. The
controller trays are shown schematically with four host ports on each of two
controllers in each controller tray. In this configuration, use the A4 connection and
the B4 connection for remote mirroring traffic instead of the A2 connection and the
B2 connection. You can use controller ports A2, A3, B2, and B3 for additional host
access if needed.
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