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HP Integrity NonStop NS-Series Operations Guide—529869-005
7-1
7
ServerNet Resources: Monitoring
and Recovery
ServerNet Communications Network on page 7-1
System I/O ServerNet Connections on page 7-4
Monitoring the Status of the ServerNet Fabrics on page 7-4
Monitoring the ServerNet Fabrics Using OSM on page 7-5
Monitoring the ServerNet Fabrics Using SCF on page 7-6
Related Reading on page 7-8
When to Use This Section
Use this section to learn about monitoring and performing recovery operations for the
internal and external ServerNet fabrics, and to understand how and when an Integrity
NonStop NS-series system can be connected to legacy NonStop S-series I/O
enclosures.
All Integrity NonStop system I/O is performed through the ServerNet system area
network (SAN). LSU logic boards connect the SAN to the replicated four-way
microprocessors on Integrity NonStop systems (except for Integrity NonStop NS1000
systems, which have no LSUs; see System I/O ServerNet Connections on page 7-4).
ServerNet Communications Network
The ServerNet communications network is a high-speed network within an Integrity
NonStop system that connects processors to each other and to peripheral controllers.
This network offers the connectivity of a standard network, but it does not depend on
shared resources such as interprocessor buses or I/O channels. Instead, the
ServerNet communications network uses the ServerNet architecture, which is
wormhole-routed, full-duplex, packet-switched, and point-to-point. This network offers
low latency, low software overhead, high bandwidth, and parallel operation.
In the ServerNet architecture, each processor maintains two independent paths to
other processors, I/O devices, and ServerNet adapters. These dual paths can be used
Notes. Integrity NonStop NS16000 systems support connectivity to NonStop S-series I/O
enclosures, Integrity NonStop NS14000 and NS1000 systems do not. For more information,
see Differences Between Integrity NonStop NS-Series Systems on page 2-2.
An Integrity NonStop NS16000 system can be part of the same ServerNet cluster as NonStop
S-series systems, an Integrity NonStop NS14000 system cannot be. For more information, see
the ServerNet Cluster Supplement for Integrity NonStop NS-Series Servers.
Integrity NonStop NS1000 systems do not support ServerNet clusters.