Filter
Top Products
© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 6 of 17
An XPS cable has a color band on the cable ends as well, red on one end and yellow on the other end. This cable
can only be used to connect Catalyst 3750-X or 3560-X switch to an XPS. Note that the connector with the red
band can only connect to an XPS while the connector with the green and blue band can connect to Catalyst 3750-
X or 3560-X switch.
The Cisco Catalyst 3750-X Series Switches come with four power supply options and any of them can be used on
any switch in a stack and in any combination. Table 2 lists these options.
Table 3. Power Supply Options for the Cisco Catalyst 3750-X Series Switches
Product ID Description
C3KX-PWR-350WAC 350W AC power supply
C3KX-PWR-715WAC 715W AC power supply
C3KX-PWR-1100WAC 1100W AC power supply
C3KX-PWR-440WDC 440W DC power supply
The following are some important concepts for Cisco StackPower technology:
●
The Cisco StackPower feature is responsible for the negotiation and distribution of power from a common
power pool among the switches participating in the power stack.
●
The intelligent load shed is a mechanism used by Cisco StackPower to decide what devices must power
down when the available power drops below the allocated power levels. A priority scheme is used to set
different levels which become useful when:
Load shedding in case the power budget falls below the allocated power levels.
Initial allocation of power to boot up into Cisco IOS Software
Priorities for powered devices and switches can be changed to values other than the pre-configured
default values.
●
Physical placement of power supplies in a switch is independent of the power required for that switch.
●
A switch may not be allowed to boot up with Cisco IOS Software if all available power in the common pool
has been already allocated. But this switch continues to participate in the power stack while waiting for
more power to become available to allow it to boot.
●
The power stack reports all of the Cisco StackPower information to the stack master; therefore, configuring
a power stack that spans multiple data stacks is not recommended (see the “Best Practices” section).