ServerNet Cluster Manual

ServerNet Cluster Description
ServerNet Cluster Manual—520575-003
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Cluster Switch
Cluster Switch
The cluster switch is an assembly consisting of the following components:
•
ServerNet II Switch
•
Uninterruptible power supply (UPS)
•
AC transfer switch
Depending on the type of topology, a ServerNet cluster uses from two to six cluster
switches. Clusters with a star topology use one cluster switch per external fabric for a
total of two cluster switches. Clusters with a split-star topology use two cluster switches
per external fabric for a total of four cluster switches. Clusters with a tri-star topology
use three cluster switches per external fabric for a total of six cluster switches. For
details on the topologies, see Three Network Topologies Supported.
Packaging for Cluster Switches
The cluster switch can be packaged in a switch enclosure that is half the height of the
standard NonStop S-series enclosure. Figure 1-14 shows the switch enclosure. The
switch enclosure can be installed on top of a NonStop S-series system enclosure—but
not on top of stacked system enclosures. For details, see Figure 2-8, Placement of
Cluster Switches.