NonStop NS1000 Planning Guide (H06.05+)

Integrity NonStop NS1000 System Description
HP Integrity NonStop NS1000 Planning Guide—542527-004
4-5
ServerNet Fabric I/O
In the Integrity NonStop1000 server, fiber-optic links connect ServerNet PCI adapter
cards in the blade elements to 4PSEs located in the IOAM enclosure. The 4PSEs
provide the physical ServerNet connectivity to the blade elements by externalizing the
ServerNet links from the IOAM enclosure midplane. Up to four 4PSEs can be installed
in an IOAM enclosure, in slots 1 and 2 of modules 2 and 3. Each 4PSE supports up to
four blade elements on one fabric.
The ServerNet network architecture is full-duplex, packet-switched, and point-to-point
in a star configuration. It employs two independent I/O communications paths
throughout the system: the ServerNet X fabric and the ServerNet Y fabric. These dual
paths ensure that no single failure disrupts communications among the remaining
system components.
Simplified ServerNet System Diagram
This simplified diagram shows the ServerNet architecture in the Integrity NonStop
NS1000 system. It shows the X and Y ServerNet communication pathways between
the blade elements, 4PSEs, ServerNet switch boards, and ServerNet I/O adapters.
VST814.vsd
IOAM
Module 2
IOAM
Module 3
IOAM
Enclosure
Y ServerNet
Switch
Board
X ServerNet
Switch
Board
G4SA FCSA FCSA
4PSE 4PSE
G4SA FCSA FCSA
4PSE 4PSE
SW SW
X Y
Blade
element
G-bit Ethernet to LANs
Fibre Channel to Storage