NonStop NS16000 Series Planning Guide (H06.11+)

This illustration shows an example of two DL385 G2 or G5 Storage CLIMs connected to two
p-switches (slot 4, ports 1 through 4). Connections for both ServerNet fabrics are shown. Storage
CLIMs connect to slots 4 through 9 of the p-switch:
Processor Switches to IOAM Enclosures
Each p-switch (for the X or Y ServerNet fabric) has up to six I/O PICs. One I/O PIC is required
for each IOAM enclosure in the system, allowing up six IOAM enclosures in the system. Four
ServerNet cables connect each of the four ports of an I/O PIC in the X and Y ServerNet p-switches
to the corresponding ports on one of the ServerNet switch boards in the IOAM enclosure.
These restrictions apply to connecting the p-switches to the IOAMs:
• The same PIC number in the X and Y p-switch must be used, such as PIC 4 as shown in the
illustration on the next page.
• Each port on the p-switch PIC must connect to the same numbered port on the IOAM enclosure’s
ServerNet switch board (port 1 to port 1, port 2 to port 2, and so forth).
• Connections to an IOAM enclosure cannot co-exist on the same p-switch PIC with connections
to a NonStop S-series I/O enclosure.
This illustration shows an example of a fault-tolerant ServerNet configuration connecting two FCSAs,
one in each IOAM module, to a pair of Fibre Channel disk modules:
78 System Configuration Guidelines