NonStop S-Series Planning and Configuration Guide (G06.29+)

The ServerNet Communications Network
HP NonStop S-Series Planning and Configuration Guide—523303-021
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Flexibility of the ServerNet Architecture
Flexibility of the ServerNet Architecture
Concurrent Messages
The ServerNet communications network allows many messages to be sent
concurrently.
Processors and I/O devices communicate over point-to-point ServerNet links
connected by ServerNet routers, which are crossbar switches that can simultaneously
connect any input with any output.
Interconnected Components
The ServerNet communications network allows numerous connections among many
types of system components. Because each ServerNet link is point-to-point, different
ServerNet links can be in use simultaneously with different messages.
For example, processor 0 might receive two kinds of messages simultaneously: data
from an I/O device, and messages from another processor.
This structure allows you to transfer data directly between any two components on the
ServerNet communications network.
Fault Tolerance for Complex Operations
The ServerNet architecture extends fault tolerance to operations that previously
required a system outage. You can add, online, not only individual components, but
also entire enclosures.
•
To add individual components online, see the NTL Support and Service Library.
•
To add entire enclosures online, see the NonStop S-Series System Expansion and
Reduction Guide.