NonStop NS-Series Operations Guide (H06.03+)

ServerNet Resources: Monitoring and Recovery
HP Integrity NonStop NS-Series Operations Guide—529869-001
7-3
System I/O ServerNet Connections
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 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.