NonStop NS-Series Planning Guide (H06.03+)

Planning for LAN Communications
HP Integrity NonStop NS-Series Planning Guide—529567-004
6-14
Primary and Backup System Consoles Managing
One System
Because all servers are shipped with the same preconfigured IP addresses for MSP0,
MSP1, $ZTCP0, and $ZTCP1, 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 is the recommended configuration. It is similar to the setup configuration, but for
fault-tolerant redundancy, it includes a second maintenance switch, backup system
console, and modem. The maintenance switches provide a dedicated LAN in which all
nodes use the same subnet.
The maintenance LAN is normally connected to the operations LAN using a single
connection. If both sides of the maintenance LAN connect directly to the operations
LAN, you must:
•
Enable Spanning Tree Protocol (STP) in switches or routers that are part of the
operations LAN.
•
Change the preconfigured IP address of the backup system console before you
add it to the LAN.
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.
Caution.
Networks with more than one path between any two nodes 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
2524 maintenance switch and enable STP in the maintenance switches. STP ensures
only one active path at any given moment between two nodes on the network. In
networks with two or more physical paths between two nodes, STP ensures only one
active path between them and blocks all other redundant paths.