NEC SigmaBlade N8406-040(F) User Manual page 203

Cascading four 8G FC Switch (Blade Enclosure)
iStorage WB51xA(NF9340-SS025/SS026)
Blade Enclosure #1
Blade Enclosure #2 Blade Enclosure #3 Blade Enclosure #4
IMPORTANT:
By making cascade connection between 8G FC Switch to two paths, even if a failure
occurs on one cascade path, no influence to I/O operation occur because I/O operation
is succeeded by redundant path and no Fabric reconstruction occurs.
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