HP NonStop G-Series User Manual
Page 282
Switch. The subcomponents include the ServerNet II Switch, the AC transfer switch, and
the uninterruptible power supply (UPS). A cluster switch enclosure resembles, but is half
the height of, a standard HP NonStop S-series system enclosure.
cluster switch group
Within an external ServerNet fabric, all the cluster switches that belong to the same
. A cluster switch group can consist of up to four 6780 switches, each
representing one
. All of the cluster switches that form a cluster
switch group typically are installed in the same cluster switch rack.
cluster switch layer
The topological cluster switch position within a
group can contain up to four layers, numbered 1 to 4 from bottom to top. A cluster switch
layer consists of a pair of cluster switches (X and Y) and provides connections for up to
eight ServerNet nodes. Layers within a group are interconnected by intragroup cables.
When all four layers are present, the intragroup cables are configured as a
cluster switch layer number
A number in the range 1 through 4 that identifies the position of a cluster switch within a
cluster switch group. See also
cluster switch logic board
A circuit board that provides switching logic for
HP NonStop" ServerNet Switch (model
. The logic board (LB) has a front panel for operator and maintenance functions.
cluster switch zone
A pair of X-fabric and Y-fabric
and the ServerNet nodes connected
to them. Up to three zones are possible. The zones, if more than one, are interconnected
by interzone cables, with each
cabled separately from the other layers
cold load
A synonym for
or load (in the case of a single processor load).
Common Communication ServerNet adapter (CCSA)
A ServerNet adapter that provides a NonStop S-series integration platform for Signaling
System Number 7 (SS7) protocol communications.
complex programmable logic device (CPLD)
Provides the LSU or Blade Element with power-on reset sequencing, configuration
loading prior to complete system startup, a watchdog timer, and monitoring of the health
of the FPGAs.
communications line interface processor (CLIP)