Installation guide

Section A.1:Setting Up Power Switches 151
A Supplementary Hardware Information
The information in the following sections can help you set up a cluster hardware configuration. In
some cases, the information is vendor specific.
A.1 Setting Up Power Switches
A.1.1 Setting up RPS-10 Power Switches
If an RPS-10 Series power switch is used as a part of a cluster, be sure of the following:
• Set the rotary address on both power switches to 0. Be sure that the switch is positioned correctly
and is not between settings.
• Toggle the four Setup switches on both power switches, as follows:
Table A–1 Setting up RPS-10 Power Switches
Switch Function Up Position Down Position
1
Data rate X
2 Toggle delay
X
3 Power up default
X
4 Unused
X
• Ensure that the serial port device special file (for example, /dev/ttyS1) that is specified in
the /etc/cluster.conf file corresponds to the serial port to which the power switch’s serial
cable is connected.
• Connect the power cable for each cluster system to its own power switch.
• Use null modem cables to connect each cluster system to the serial port on the power switch that
provides power to the other cluster system.
Figure A–1, RPS-10 Power Switch Hardware Configuration shows an example of an RPS-10 Series
power switch configuration.