Specifications

14 – Configuring and Monitoring a Redundant Server System
318 R400
If Station is unable to connect to the backup server via the first network Station
attempts to reconnect to the primary server via the second network.
If Station is unable to connect to the primary server via the second network
Station attempts to connect to the backup server via the second network.
This way both servers and both networks are tested by Station in an attempt to
make a valid connection.
In this case, four Station setup files are required:
• default.stn which connects to hsserva0 via the first network (and has
auxiliary setup file hsservb.stn)
• hsservb.stn which connects to hsservb0 via the first network (and has
auxiliary setup file hsserva1.stn)
• hsserva1.stn which connects to hsserva1 via the second network (and
has auxiliary setup file hsservb1.stn)
• hsservb1.stn which connects to hsservb1 via the second network (and
has auxiliary setup file default.stn)
When Station is started it connects to hsserva (as configured in default.stn).
If hsserva fails (or connection to hsserva is lost), it connects to hsservb (via the
same network). If it fails to connect to hsservb it attempts to reconnect to hsserva
(via the second network, hsserva1). If it fails to connect to hsserva, it attempts to
reconnect to hsservb (via the second network hsservb1). If it fails to connect to
hsservb, it then attempts its initial connection (hsserva via the first network)
again.
In addition to specifying the auxiliary files, you need to ensure that Station can
access displays by:
• Ensuring your TCP/IP settings you have selected Enable DNS for Windows
Resolution (Windows NT only).
• Ensuring the host files include the host server names.
• Creating the network connections on the computer running Station.
• The relevant network paths are added to the Displays tab in the Connection
Properties dialog box for all of the required .stn files.
For details on configuring setup files see “Configuring Station Connections” on
page 63 and “Connection Properties Dialog Box” on page 69.
plscpcg.book Page 318 Monday, May 28, 2001 10:11 AM