Specifications

A-10
Catalyst 2950 and Catalyst 2955 Switch Command Reference
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Appendix A Catalyst 2955-Specific Alarm Commands
power-supply dual
power-supply dual
Use the power-supply dual global configuration command to set the dual power-supply mode of
operation. Use the no form of this command to return to the default single power-supply mode.
power-supply dual
no power-supply dual
Syntax Description This command has no keywords or arguments.
Defaults By default, the system operates in single-power mode.
Command Modes Global configuration
Command History
Usage Guidelines The Catalyst 2955 switch has two DC power inputs. When the switch is connected to a second DC input
and put in dual power-supply mode, the second power supply provides power to the switch if the primary
supply fails.
When the switch is in dual power-supply mode, you can use the alarm-facility power supply global
configuration command to set alarm options and monitor for a missing or failed primary power supply.
Examples The following example sets the switch in a dual power-supply mode.
Switch(config) # power-supply dual
Related Commands
Release Modification
12.1(12c)EA1 This command was first introduced.
Command Description
alarm facility
power-supply
Sets the switch to monitor for a missing or failed power supply and sets the
alarm options.
show alarm settings Displays environmental alarm settings and options.