Cisco Stackpower Technology; Stackpower Connector - Cisco Catalyst 3560X-24P Datasheet

creates and updates all the switching and optional routing tables. A working stack can accept new members or
delete old ones without service interruption. StackWise creates a highly resilient single unified system of up to nine
switches, providing simplified management using a single IP address, single telnet session, single command-line
interface (CLI), auto-version checking, autoconfiguration, and more. StackWise Plus supports all the features of
StackWise and provides backward compatibility with the existing Cisco Catalyst 3750 Series Switches while
enhancing the throughput of the system up to 64 Gbps. StackWise Plus also enables local switching in Cisco
Catalyst 3750-X Series Switches. Local switching packets coming into a port in the Cisco Catalyst 3750-X Series or
3750-E Series Switch destined for another port in the same switch do not have to traverse through the stack ring,
thus increasing the forwarding capacity of the switch. The Cisco Catalyst 3750-X Series stacks up to nine switches
as a single logical unit for a total of 432 Ethernet 10/100/1000 ports with 18 10GbE ports. Individual 10/100/1000
units can be joined in any combination to evolve with network needs.

Cisco StackPower Technology

The Cisco Catalyst 3750-X Series introduces Cisco StackPower technology, innovative power interconnect system
that allows the power supplies in a stack to be shared as a common resource among all the switches. Cisco
StackPower unifies the individual power supplies installed in the switches and creates a pool of power, directing that
power where it is needed. This feature is only available in the Cisco Catalyst 3750-X Series Switches with IP Base or
IP Services feature set. Up to four switches can be configured in a StackPower stack with the special connector at
the back of the switch using the StackPower cable, which is different than the StackWise cables available on all
Cisco Catalyst 3750 models. (See Figure 3.)
Figure 3.
StackPower can be deployed in either power sharing mode or redundancy mode. In power sharing mode, the power
of all the power supplies in the stack is aggregated and distributed among the switches in the stack. In redundant
mode, when the total power budget of the stack is calculated, the wattage of the largest power supply is not
included. That power is held in reserve and used to maintain power to switches and attached devices when one
power supply fails, enabling the network to operate without interruption. Following the failure of one power supply,
the StackPower mode becomes power sharing.
StackPower allows customers to simply add one extra power supply in any switch of the stack and provide either
power redundancy for any of the stack members or simply add more power to the shared pool. StackPower
eliminates the need for an external redundant power system or installation of dual power supplies in all the stack
members.
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StackPower Connector

Data Sheet
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