remote solution is used). The maintenance switches provide a dedicated LAN in which all systems
use the same subnet.
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 NS2100 system. In this case, Hewlett Packard Enterprise 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. Ask your Hewlett Packard Enterprise service provider to refer to the
Nonstop Dedicated
Service LAN Installation and Configuration Guide
for instructions on connecting multiple systems
to the dedicated service LAN.
102
Maintenance and Support Connectivity
