Cisco 4500M User Manual

7-7
Software Configuration Guide—Release 12.2(25)EW
OL-6696-01
Chapter 7 Environmental Monitoring and Power Management
Power Management
power always remain enabled, with no disruption of network connectivity. Modules placed in reset mode
still consume some power and can be removed from the chassis to further reduce power requirements. If
you configure the chassis correctly, the system will not enter the evaluation cycle.
A module in reset mode continues to draw power as long as it is installed in the chassis; you can use the
show power module command to determine how much power is required to bring the module online.
To compute the power requirements for your system and verify that your system has enough power, add
the power consumed by the supervisor engine module(s), the fan box(es), and the installed modules
(including PoE). For PoE, total the requirements for all the phones. See the “Powering Down a Module”
section on page 7-15 for more information on the power consumption for the various components of your
switch.
The 802.3af-compliant PoE modules can consume up to 20 W of PoE to power FPGAs and other
hardware components on the module. Be sure to add at least 20 W to your PoE requirements for each
802.3af-compliant PoE module to ensure that the system has adequate power for the PDs connected to
the switch.
On the WS-X4148-RJ45V PoE module, PoE consumption cannot be measured. Therefore, for all PoE
calculations, the PoE consumption on this module is presumed to be equal to its administrative PoE.
You can use the show module command to verify which modules are active and which, if any, have been
placed in reset.
The following example shows the show module command output for a system with inadequate power
for all installed modules. The system does not have enough power for Module 5; the “Status” displays
it as “PwrDeny.”
If the PoE that is consumed by the module is more than 50 W above the PoE you allocated using the
power inline consumption default command, the “Status” displays as “PwrOver.” If the PoE consumed
by the module is more than 50 W above the PoE module limit, the “Status” displays as “PwrFault.”
Switch# show module
Mod Ports Card Type Model Serial No.
----+-----+--------------------------------------+-----------------+-----------
1 2 1000BaseX (GBIC) Supervisor(active) WS-X4014 JAB054109GH
2 6 1000BaseX (GBIC) WS-X4306 00000110
3 18 1000BaseX (GBIC) WS-X4418 JAB025104WK
5 0 Not enough power for module WS-X4148-FX-MT 00000000000
6 48 10/100BaseTX (RJ45) WS-X4148 JAB023402RP
M MAC addresses Hw Fw Sw Status
--+--------------------------------+---+------------+----------------+---------
1 005c.9d1a.f9d0 to 005c.9d1a.f9df 0.5 12.1(11br)EW 12.1(20020313:00 Ok
2 0010.7bab.9920 to 0010.7bab.9925 0.2 Ok
3 0050.7356.2b36 to 0050.7356.2b47 1.0 Ok
5 0001.64fe.a930 to 0001.64fe.a95f 0.0 PwrDeny
6 0050.0f10.28b0 to 0050.0f10.28df 1.0 Ok
Switch#
Configuring Redundant Mode on a Catalyst 4500 Series Switch
By default, the power supplies in a Catalyst 4500 series switch are set to operate in redundant mode. To
effectively use redundant mode, follow these guidelines:
• Use two power supplies of the same type.
• If you have the power management mode set to redundant mode and only one power supply
installed, your switch will accept the configuration but operates without redundancy.

Cisco 4500M Specifications

General

Brand	Cisco
Model	4500M
Category	Network Router
Language	English