Chapter 4. IBM System Storage DS3500 and EXP3500 Cabling 129
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single switch with a one-to-one zoning configuration for the same effective connections, but
best practise is to use two switches for path redundancy.
Figure 4-36 Example of a dual Fibre Channel SAN fabric configuration
SAN fabric with Inter-Switch Links
A similar configuration to the configuration in Figure 4-36 but using an Inter-Switch Link (ISL)
between the two switches is shown in Figure 4-37 on page 130.
In this example, the two SAN switches form a single SAN fabric because of the ISL
connection between them.