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Cisco StackWise Plus Technology
Cisco StackWise Plus technology is built on the highly successful industry leading StackWise technology, which is
a premium stacking architecture optimized for GbE. StackWise technology was designed to respond to additions,
deletions, and redeployment while maintaining constant performance. The stack behaves as a single switching
unit that is managed by a master switch elected from one of the member switches. The master switch
automatically 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 available in all Cisco Catalyst 3750-X Series Switches feature sets
*
.
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. (See Figure 3.)
Figure 3. StackPower Connector