OSM Service Connection User's Guide (G06.32+)

tetrahedron A solid bounded by four triangular faces. In ServerNet context, a tetrahedron is four processors
interconnected by ServerNet links so as to form a conceptual tetrahedron. Each processor
therefore has a direct connection to the other three processors. See tetrahedral topology.
Token-Ring
ServerNet adapter
(TRSA)
A ServerNet adapter that provides a single line from a NonStop S-series server to a token-ring
network, allowing the server to act as a station on the ring. The 3862 TRSA can be configured
to support network speeds of 4 megabits/second (Mbps) or 16 Mbps, and the media can be
either shielded twisted pair (STP) or unshielded twisted pair (UTP).
topology The physical layout of components that define a local area network ( LAN). a system area
network ( SAN), or a wide are network ( WAN).
See also layered topology and star topology.
topology branch A processor enclosure and the I/O enclosures directly connected to it.
track ID A unique number assigned to customer-replaceable unit (CRU) and field-replaceable units
(FRUs). The track ID is located on a label on the outside of the component, usually following
the assembly number of the component.
Transmission
Control Protocol
(TCP)
A connection-oriented protocol that provides for the reliable exchange of data between a sending
and a receiving system, no matter how many intermediate nodes the data traverses. TCP, in
conjunction with the internet protocol (IP), is used to facilitate OSM communications over an
Ethernet local area network ( LAN).
tree pane Located on the left side of the Management window, a pane that displays resources in a
hierarchy. The tree pane contains a drop down menu with two options: System view and
ServerNet Cluster view. The System view bears the name of the local system and displays
resources within the system. The ServerNet Cluster view displays resources in a supported
Expand network, such as a ServerNet cluster.
See also details pane and view pane.
tri-star topology A network topology that uses up to three HP NonStop Cluster Switches for each external fabric.
External routing is implemented between the three star groups of a ServerNet cluster. (A star
group consists of the eight nodes attached to one set of cluster switches.) The star groups are
joined by two-lane links. The tri-star topology supports up to 24 nodes. See also split-star
topology, star topology, and layered topology.
two-lane link The two single-mode fiber-optic (SMF) ServerNet cables that connect the HP NonStop Cluster
Switches on the same external fabric (for example, X1, X2, and X3) in a tri-star topology.
U
unattended site
(dark site)
A location where no operator is working on site and the only access to the LAN is from a
centralized monitoring station through a modem connected to a routing workstation. Dark site
is a synonym for unattended site.
uncorrectable
memory error
(UCME)
An error caused by incorrect data at a particular memory location. The cause of the incorrect
data is one that is not automatically corrected by the system, and memory replacement might
be required. The occurrence of a UCME indicates that a processor is having memory errors.
The processor halts with a hardware error freeze and generates an alarm as well as an incident
report.
uninterruptible
power supply
(UPS)
The equipment used to provide an uninterruptible source of power to connected equipment if
a main power outage occurs.The basic components of any UPS system are a rectifier/charger
that converts alternating-current (AC) power to direct-current (DC) power, batteries that store
the DC power, and an inverter that converts the DC power back into AC power for distribution
to the load..
V
value-added
diagnostics
A collection of troubleshooting and support features that are included with a valid service
contract. These features include:
• The generation of incident reports and EMS event messages related to incident reports
• The ability to configure the dial-out phone number
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