Cisco 6509 - Catalyst Chassis Switch Installation Manual page 269

Appendix A Power Supply Specifications
Table A-22 Effects of Power Supply Configuration Changes (continued)
Configuration Change
Equal wattage power
supply is inserted with
redundancy disabled
Higher wattage power
supply is inserted with
redundancy enabled
Lower wattage power
supply is inserted with
redundancy enabled
Higher or lower wattage
power supply is inserted
with redundancy disabled
Power supply is removed
with redundancy enabled
Power supply is removed
with redundancy disabled
OL-5781-04
Effect
System log and syslog messages are generated.
•
System power is the combined power capability of both supplies.
•
• The modules marked as power-deny in the show module Status field
are brought up if there is sufficient power.
• System log and syslog messages are generated.
The system disables the lower-wattage power supply; the
•
higher-wattage supply powers the system (Catalyst operating
system).
• For Cisco IOS, both power supplies come on. The total available
wattage is the output wattage of the higher wattage power supply.
System log and syslog messages are generated.
•
The system disables the lower-wattage power supply; the
•
higher-wattage supply powers the system (Catalyst operating
system).
• For Cisco IOS, both power supplies come on. The total available
wattage is the output wattage of the higher wattage power supply.
System log and syslog messages are generated.
•
System power is increased to the combined power capability of both
•
supplies.
The modules marked as power-deny in the show module Status field
•
are brought up if there is sufficient power.
System log and syslog messages are generated.
•
If the power supplies are of equal wattage, there is no change in the
•
module status because the power capability is unchanged.
If the power supplies are of unequal wattage and the lower-wattage
supply is removed, there is no change in the module status.
If the power supplies are of unequal wattage and the higher-wattage
supply is removed, the lower-wattage power supply must be turned on
manually. (The system had previously turned off the lower-wattage
power supply.)
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 module Status field.
Catalyst 6500 Series Switches Installation Guide
Power Supply Redundancy
A-59