Combined Mode Power Resiliency - Cisco Catalyst 4500 Series Software Configuration Manual

Chapter 14 Environmental Monitoring and Power Management

Combined Mode Power Resiliency

This feature only applies in combined mode when both power supply bays contain the 4200 W AC or
Note
6000 W AC power supply.
Using the combined mode power resiliency feature, you can limit the power usage to a maximum of two
or three (configurable) inputs for 4000W and 6000W power supplies. For 9000W power supplies, you
can limit the power usage to a maximum of 2 to 5 inputs, since the 9000W is a triple input power supply.
With two 4200 W AC or 6000 W AC power supplies, a maximum of four inputs are available. With two
9000W, a maximum of six inputs are available. This feature allows you to cap the power usage to that of
two/three inputs or four/five inputs. If one of the power supplies fails, no loss of power occurs because
you have capped its usage to a smaller number of inputs.
To configure the combined mode resiliency feature, perform this task:
Command
Step 1
Switch# configure terminal
Step 2
Switch(config)# power redundancy combined max
inputs {2 | 5}
OR
Switch(config)# power redundancy combined max
inputs {2 | 3}
Step 3
Switch(config)# end
If you have max inputs 3 configured with four "good" (220 V) inputs and you limit the user to 5500 W
instead of 7600 W and one subunit fails or is powered off, you have three quality inputs providing 5500
W and the chassis is powered at the same rate as it was prior to the failure event:
Switch# configuration terminal
Enter configuration commands, one per line.
Switch(config)# power redundancy combined max inputs 3
Switch(config)# end
Switch#
14:32:01: %SYS-5-CONFIG_I: Configured from console by console
Here is the output of the show power command prior to invoking this feature:
Switch# show power
sh power
Power
Supply
------
PS1
PS1-1
PS1-2
Model No Type
---------------- ---------
PWR-C45-4200ACV AC 4200W
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Purpose
Enters configuration mode.
If a 9000W AC power supply is detected, this
the power usage to four or five inputs.
Note
If a 9000W AC power supply is not detected,
limits the power usage to two or three inputs.
Note
Exits configuration mode.
End with CNTL/Z.
Fan
Status Sensor
----------- -------
good good
110V good
110V good
Power Management
The maximum inputs part of the
command is ignored by all power
supplies other than 9000 W AC.
The maximum inputs part of the
command is ignored by all power
supplies other than the 4200 W AC or
6000 W AC.
Inline
Status
-------
good
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