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Figure 4-2 ServerNet Switch High I/O Supported Connections
Connections to IOAM Enclosures
The NonStop BladeSystem supports connections to an IOAM Enclosure. The IOAM Enclosure
requires 4-way Servernet links. If you want 4 IOAMs in the first enclosure, only the ServerNet
High I/O Switch provides these number of connections, which are available on quad optic ports
4, 5, 6, and 7 (labelled EA, EB, EC, and ED) as illustrated in Figure 4-2.
The NonStop BladeSystem supports a maximum of six IOAMs in a NonStop BladeSystem system
with 16 processors. For a 16 processor system, the connection points are asymmetrical between
the ServerNet Switches. Only ports EA and EC support connections to an IOAM enclosures on
the second ServerNet switch. For the Standard I/O ServerNet switch, only one IOAM module
can be attached per c7000 enclosure. Additionally, if a Standard I/O ServerNet switch is used for
the first c7000 enclosure for one IOAM enclosure, then the second c7000 enclosure only supports
one more IOAM enclosure regardless of the type of ServerNet switch (Standard I/O or High I/O).
Connections to CLIMs
The NonStop BladeSystem supports a maximum of 24 CLIM modules per system. A CLIM uses
either one or two ServerNet connections to a fabric. The Storage CLIM typically uses two
connections per fabric to achieve high disk performance. The IP CLIM typically uses one
connection per ServerNet fabric. For I/O connections, a breakout cable is used on the back panel
of the c7000 enclosure ServerNet switch to convert to standard LC-Duplex style connections.
NonStop BladeSystem Port Connections
This subsection includes:
• “Fibre Channel Ports to Fibre Channel Disk Modules”
• “Fibre Channel Ports to Fibre Tape Devices” (page 57)
• “SAS Ports to SAS Disk Enclosures” (page 57)
• “SAS Ports to SAS Tape Devices” (page 57)
Fibre Channel Ports to Fibre Channel Disk Modules
Fibre Channel disk modules (FCDMs) can only be connected to the FCSA in an IOAM enclosure.
FCDMs are directly connected to the Fibre Channel ports on an IOAM enclosure with this
exception:
Up to four FCDMs (or up to four daisy-chained configurations with each daisy-chain configuration
containing 4 FCDMs) can be connected to the FCSA ports on an IOAM enclosure in a NonStop
Blades System.
56 System Configuration Guidelines