Power Redundancy-Mode - Cisco MDS 9000 series Command Reference Manual

Chapter 18 P Commands
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m

power redundancy-mode

To configure the capacity of the power supplies on the Cisco MDS 9500 Family of switches, use the
power redundancy-mode command in configuration mode. Use the no form of the command to negate
the command or revert to factory defaults.
Syntax Description combined
force
redundant
Defaults Redundant mode.
Command Modes Configuration mode.
Command History Release
1.0(2)
Usage Guidelines
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Examples The following examples demonstrate how the power supply redundancy mode could be set.
switch(config)# power redundancy-mode combined
WARNING: This mode can cause service disruptions in case of a power supply failure.
Proceed ? [y/n] y
switch(config)# power redundancy-mode redundant
OL-8413-07, Cisco MDS SAN-OS Release 3.x
power redundancy-mode {combined [force] | redundant}
no power redundancy-mode {combined [force] | redundant}
Configures power supply redundancy mode as combined.
Forces combined mode without prompting.
Configures power supply redundancy mode as redundant.
Modification
This command was introduced.
If power supplies with different capacities are installed in the switch, the total power available
differs based on the configured mode:
In redundant mode, the total power is the lesser of the two power supply capacities. This reserves
enough power to keep the system powered on in case of a power supply failure. This is the
recommended or default mode.
In combined mode, the total power is twice the lesser of the two power supply capacities. In case of
a power supply failure, the entire system could be shut down, depending on the power usage at that
time.
When a new power supply is installed, the switch automatically detects the power supply capacity.
If the new power supply has a capacity that is lower than the current power usage in the switch and
the power supplies are configured in redundant mode, the new power supply will be shut down.
When you change the configuration from combined to redundant mode and the system detects a
power supply that has a capacity lower than the current usage, the power supply is shut down. If both
power supplies have a lower capacity than the current system usage, the configuration is not allowed.
power redundancy-mode
Cisco MDS 9000 Family Command Reference
18-31