NonStop NS2200 Series Planning Guide

NOTE: The NonStop system console must be configured with some ports open. For more
information, see the NonStop System Console Installer Guide.
System Console Configurations
Several system console configurations are possible:
• “Primary and Backup System Console Managing One System” (page 171)
• “Primary and Backup System Consoles Managing Multiple Systems” (page 171)
Primary and Backup System Console Managing One System
This configuration is required for NonStop NS2200 series systems. 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. Figure 48 (page 166) 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.
NOTE: Do not perform the next two bulleted items if your backup system console is shipped
with a new NonStop NS2200 system. In this case, HP has already configured these items for
you.
• Change the preconfigured DHCP configuration of the backup system console before you add
it to the LAN.
• Change the preconfigured IP address of the backup system console before you add it to the
LAN.
CAUTION: Networks with more than one path between any two systems can cause loops
that result in message duplication and broadcast storms that can bring down the network. If
a second connection is used, refer to the documentation for the ProCurve maintenance switch
and enable STP in the maintenance switches. STP ensures only one active path at any given
moment between two systems on the network. In networks with two or more physical paths
between two systems, STP ensures only one active path between them and blocks all other
redundant paths.
Primary and Backup System Consoles Managing Multiple Systems
If you want to manage more than one system from a fault-tolerant pair of consoles, you can daisy
chain the maintenance switches together. This configuration requires an IP address scheme to
support it. For instructions on connecting multiple systems to the dedicated service LAN, ask your
HP service provider to refer to the NonStop Dedicated Service LAN Installation and Configuration
Guide.
System Consoles for NonStop NS2200 Series Systems 171