NonStop S-Series Planning and Configuration Guide (G06.25+)

Topologies
HP NonStop S-Series Planning and Configuration Guide—523303-015
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Topology Configuration Considerations
Topology Configuration Considerations
Considerations for planning or changing the size or topology of your system:
•
Processors are always installed in pairs, two processors in each processor
enclosure.
•
A Tetra 8 system can have one through four processor enclosures (two through
eight processors).
•
You can add processor enclosures to a Tetra 8 system until the maximum of four
processor enclosures (eight processors) is reached.
•
A Tetra 16 system can have one through eight processor enclosures (two through
sixteen processors).
•
You can add processor enclosures to a Tetra 16 system until the maximum of eight
processor enclosures (two through sixteen processors) is reached.
•
Processor enclosures must be added to a system in order by group number.
•
To change topologies, you must shut down the system. You might need to move
some cables or change some system configurations.
•
The NonStop S700 and other small size servers support only two processors, and
it can be configured only in the Tetra 8 topology. For more information, contact your
HP representative.
•
Two processor enclosures are connected together with a pair of ServerNet cables,
which connect a pair of SEBs or MSEBs in one enclosure and to a pair of SEBs or
MSEBs in the other enclosure.
•
An I/O enclosure is connected to a processor enclosure with a pair of ServerNet
cables, which connect a pair of SEBs or MSEBs in the processor enclosure to a
pair of IOMF CRUs or IOMF 2 CRUs in the I/O enclosure.
•
An IOAM enclosure is mounted in a standard 19-inch modular rack and connects
to the MSEB of S76000 and later NonStop S-series systems using multimode fiber-
optic cables (with LC-SC connectors) up to a maximum length of 125 meters. The
LC connector connects to the ServerNet switch board and the SC connector
connects to the MSEB.
•
IOAM enclosures (Groups 11, 12, 13, 14, or 15) are installed only in the inner
tetrahedron (Groups 01, 02, 03, and 04) and derive their group numbers from the
Group 01 I/O enclosures they displace.
•
No I/O enclosure can be installed in the corresponding location Groups 02, 03, or
04 as shown in this table: