Introduction to NonStop Operations Management
Operations Documentation
Introduction to NonStop Operations Management–125507
4-5
Configuration Diagrams and Listings
Configuration Diagrams and Listings
Configuration diagrams and listings help the operations staff monitor systems, recognize
problems, and prepare for configuration changes. Useful diagrams include:
•
Network diagrams. Network configuration diagrams show the network nodes and
the lines that connect the nodes. On the network diagram, you can also specify the
specific lines such as Expand, SNAX, X25AM, and so on.
•
System diagrams. System diagrams show the names and connections of processors,
devices, and paths.
Figure 4-1 shows a simplified network configuration diagram. Figure 4-2 shows a
system configuration diagram for a four-processor system, including the router
connections, ServerNet expansion boards (SEBs), and ServerNet adapters used by the
ServerNet system area network (ServerNet SAN).
For G-series systems, the ServerNet SAN provides the communication path used for
interprocessor messages and for communications between processors and I/O
controllers. Because each ServerNet link is point-to-point, different links can be in use
simultaneously with different messages. The ServerNet architecture maintains an
important similarity to the architecture of previous Tandem systems: each processor has
two independent paths to other processors or ServerNet adapters. No single failure can
disrupt communications among the remaining units. Also, the two paths (X and Y)
shown in Figure 4-2 can be used simultaneously to improve performance. Refer to the
ServerNet Communications and Configuration Manual for a detailed description of the
ServerNet SAN subsystem.
The ServerNet wide area networking (WAN) subsystem is a collection of software and
hardware components that provides G-series systems with networking and data-
communications capabilities. The ServerNet WAN subsystem is used to configure both
WAN and local area network (LAN) connectivity for supported communication
(COMM) subsystem objects.