NonStop S-Series Server Description Manual (G06.24+)

Glossary
HP NonStop S-Series Server Description Manual—520331-003
Glossary-13
CLIP
CLIP. See communications line interface processor (CLIP).
cluster. (1) A collection of servers, or nodes, that can function either independently or
collectively as a processing unit. See also ServerNet cluster. (2) A term used to
describe a system in a Fiber Optic Extension (FOX) ring. More specifically, a FOX
cluster is a collection of processors and I/O devices functioning as a logical group. In
FOX nomenclature, the term is synonymous with system or node.
cluster number. A number that uniquely identifies a node in a Fiber Optic Extension (FOX)
ring. This number is in the range 1 through 14. See also node number.
cluster switch. See HP NonStop™ Cluster Switch (model 6770) and HP NonStop™
ServerNet Switch (model 6780).
cluster switch enclosure. An enclosure provided by HP for housing the subcomponents of
an HP NonStop™ Cluster Switch, which 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 of the cluster switches that
belong to the same cluster switch zone. A cluster switch group can consist of up to
four 6780 switches, each representing one cluster switch layer. 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 cluster switch group.
Each cluster switch group consists of 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 vertical tetrahedron. See also cluster switch layer number.
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 group.
cluster switch logic board. A circuit board that provides switching logic for the HP
NonStop™ ServerNet Switch (model 6780). The logic board (LB) has a front panel for
operator and maintenance functions and is a Class-3 CRU.
cluster switch rack. A mechanical frame consisting of or based on a 19-inch rack that
supports the hardware necessary for a cluster switch group.
cluster switch zone. A pair of X-fabric and Y-fabric cluster switch groups 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 cluster switch layer
cabled separately from the other layers.
CME. See correctable memory error (CME).