NonStop NS16000 Series Planning Guide (H06.11+)

One System Console Managing One System (Setup Configuration)
The one NonStop system console on the LAN must be configured as the primary system console.
This configuration can be called the setup configuration and is used during initial setup and
installation of the system console and the server.
The setup configuration is an example of a secure, stand-alone network as shown in “Basic LAN
Configuration” (page 137). A LAN cable connects the primary system console to the maintenance
switch, and additional LAN cables connect the switches and Ethernet interfaces. The maintenance
switch or an optional second maintenance switch allows you to later add a backup system console
and additional system consoles.
NOTE: Because the system console and maintenance switch are single points of failure that could
disrupt access to OSM, this configuration is not recommended for operations that require high
availability or fault tolerance.
When you use this configuration, you do not need to change the preconfigured IP addresses.
The one system console on the LAN must be configured as the primary system console. This
configuration can be called the setup configuration and is used during initial setup and installation
of the system console and the server.
One System Console Managing Multiple Systems
The one NonStop system console on the LAN must be configured as the primary system console.
Because all servers are shipped with the same preconfigured IP addresses for the primary/backup
p-switches, $ZTCP0, $ZTCP1, and Eth0 (CLIM), you must change these IP addresses for the second
and subsequent servers before you can add them to the LAN.
Primary and Backup System Consoles Managing One System
This configuration is recommended. It is similar to the setup configuration, but for fault-tolerant
redundancy, it includes a second maintenance switch, backup system console, and second modem
(if a modem-based remote solution is used). The maintenance switches provide a dedicated LAN
in which all systems use the same subnet. “Fault-Tolerant Configuration” (page 138) shows a
fault-tolerant configuration without modems.
NOTE: A subnet is a network division within the TCP/IP model. Within a given network, each
subnet is treated as a separate network. Outside that network, the subnets appear as part of a
single network. The terms subnet and subnetwork are used interchangeably.
If a remote maintenance LAN connection is required, use the second network interface card (NIC)
in the NonStop system console to connect to the operations LAN, and access the other devices in
the maintenance LAN using Remote Desktop via the console.
Because this configuration uses only one subnet, you must:
• Enable Spanning Tree Protocol (STP) in switches or routers that are part of the operations LAN.
148 Maintenance and Support Connectivity