FUJITSU ServerView Virtual-IO Manager V3.1 - Manual (Page 127)

Figure 17: BX900: Network - Overview
The I/O connection blades must be connected to the central management sta-
tion via their management port.
4.3.5 Switch stacking support
A stacking function is a group set of IBP(s) connected through Infiniband
CX4 interface of the HiGig/HiGig+ ports. One of the IBP(s) controlled the
operation of the stack modules is called the stack master. Other IBP(s) are
belonging to the stack members of the stack group system.
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4.3 Configurations on the managed BX900 Blade Server