Cisco Systems WSC4500X16SFP Manual De Usuario
7-12
Software Configuration Guide—Release 12.2(25)SG
OL-7659-03
Chapter 7 Environmental Monitoring and Power Management
Power Management
Available Power for Catalyst 4500 Series Switches Power Supplies
lists the power available for use in the various Catalyst 4500 series switches power supplies.
When your switch is configured to combined mode, the total available power in not the mathematical
sum of the individual power supplies. The power supplies have a sharing ratio predetermined by the
hardware. In combined mode, the total power available is P + (P * sharing-ratio), where P is the amount
of power in the power supply.
sum of the individual power supplies. The power supplies have a sharing ratio predetermined by the
hardware. In combined mode, the total power available is P + (P * sharing-ratio), where P is the amount
of power in the power supply.
Special Considerations for the 1400 W DC Power Supply
Caution
Do not mix the 1400 W DC power supply with any other power supply, even for a hot swap or other
short-term emergency. Doing so can seriously damage your switch.
short-term emergency. Doing so can seriously damage your switch.
Table 7-3
Available Power for Switch Power Supplies
Power Supply
Redundant Mode (W)
Combined Mode (W)
Sharing Ratio
1000 W AC
Chassis
1
= 1000
PoE = 0
1.
Chassis power includes power for the supervisor(s), all line cards, and the fan tray.
Chassis = 1667
PoE = 0
2/3
1300 W AC
Chassis (max) = 1000
PoE (max) = 800
Chassis + PoE + Backplane <
1300
1300
Chassis (min) = 767
PoE (max) = 1333
Chassis (max) = 1667
PoE (min) = 533
Chassis + PoE +
Backplane < 2200
Backplane < 2200
2/3
1400 W DC
Chassis (min) = 200
Chassis (max) = 1360
PoE (max)
2
= (DC Input
3
-
[Chassis (min) + Backplane] /
0.75) * 0.96
0.75) * 0.96
2.
The efficiency for the 1400 W DC power supply is 0.75, and 0.96 is applied to PoE.
3.
DC input can vary for the 1400 W DC power supply and is configurable. For more information, see “Special Considerations
for the 1400 W DC Power Supply” on page 12.
for the 1400 W DC Power Supply” on page 12.
Chassis = 2267
4
PoE
5
4.
Not available for PoE.
5.
Not available for PoE.
Chassis—2/3
PoE—0
1400 W AC
Chassis = 1360
PoE = 0
6
6.
No voice power.
Chassis = 2473
PoE = 0
9/11
2800 W AC
Chassis = 1360
PoE = 1400
Chassis = 2473
PoE = 2333
Chassis
7
—9/11
PoE
8
—2/3
7.
Data-only.
8.
Inline power.