38-3
Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
78-14099-04
Chapter 38 Power Management and Environmental Monitoring
Understanding How Power Management Works
Using the CLI to Power Modules Off and On
You can power down a module from the command-line interface (CLI) by entering the no power enable
module slot command.
Note When you enter the no power enable module slot command to power down a module, the module’s
configuration is not saved.
From global configuration mode, enter the power enable module slot command to turn the power on for
a module that was previously powered down.
Using the CLI to View System Power Status
Enter the show power command to view the current power status of system components as follows:
Router# show power
system power redundancy mode = redundant
system power total = 1153.32 Watts (27.46 Amps @ 42V)
system power used = 397.74 Watts ( 9.47 Amps @ 42V)
system power available = 755.58 Watts (17.99 Amps @ 42V)
Power-Capacity PS-Fan Output Oper
PS Type Watts A @42V Status Status State
---- ------------------ ------- ------ ------ ------ -----
1 WS-CAC-2500W 1153.32 27.46 OK OK on
2 none
Pwr-Requested Pwr-Allocated Admin Oper
Slot Card-Type Watts A @42V Watts A @42V State State
---- ------------------ ------- ------ ------- ------ ----- -----
1 WS-X6K-SUP2-2GE 142.38 3.39 142.38 3.39 on on
2 - - 142.38 3.39 - -
5 WS-X6248-RJ-45 112.98 2.69 112.98 2.69 on on
Router#
Power supply is removed with
redundancy enabled
• System log and syslog messages are generated.
• No cha nge in module status since power capability is unchanged.
Power supply is removed with
redundancy disabled
• System log and syslog messages are generated.
• System power is decreased to the power capability of one supply.
• If there is not enough power for all previously powered-up modules, some modules
are powered down and marked as power-deny in the show power oper state field.
System is booted with power
supplies of different wattage
installed and redundancy enabled
• System log and syslog messages are generated.
• The system does not allow you to have power supplies of different wattage installed
in a redundant configuration. The lower wattage supply shuts down.
System is booted with power
supplies of equal or different
wattage installed and redundancy
disabled
• System log and syslog messages are generated.
• System power equals the combined power capability of both supplies.
• The system powers up as many modules as the combined capacity allows.
Table 38-1 Effects of Power Supply Configuration Changes (continued)
Configuration Change Effect