NonStop NS-Series Operations Guide (H06.04+)

ServerNet Resources: Monitoring and Recovery

HP Integrity NonStop NS-Series Operations Guide—529869-002

7-3

System I/O ServerNet Connections

ServerNet connections to the system I/O devices (storage disk and tape drive as well

as Ethernet communication to networks) radiate out from the p-switches for both the X

and Y ServerNet fabrics.

ServerNet cables connected to the p-switch PICs in slots 10 through 13 come from the

LSUs and processors. Cables connected to the PICs in slots 4 though 9 connect to

one or more IOAM enclosures or to NonStop S-series I/O enclosures equipped with

IOMF2 CRUs. Figure 7-2 shows the connections to the PICs in a fully populated p-

switch:

Monitoring the Status of the ServerNet Fabrics

The ServerNet fabrics provide the communication paths used for interprocessor

messages, for communication between processors and I/O devices, and (in the case of

ServerNet clusters) for communication between systems.The ServerNet fabrics consist

of two entirely separate communication paths—the X fabric and the Y fabric.

To monitor the status of the ServerNet fabrics:

•

Use the OSM Service Connection to check the communication between processor

enclosures, I/O enclosures, and systems.

•

Use the Subsystem Control Facility (SCF) to check the status of interprocessor

communication on the X and Y fabrics.

Figure 7-2. I/O Connections to the PICS in a P-Switch

Note. If the system is a member of a ServerNet cluster, ServerNet connections to other

members are accomplished by extending the ServerNet fabrics outside the system. Such

external connections make up the external ServerNet fabrics. The ServerNet Cluster Manual

provides additional information about monitoring the external ServerNet fabrics.