Cisco 3825 Hardware Installation Guide - Page 241

Chapter 18 Connecting Cisco EtherSwitch Service Modules Stacking the Cisco EtherSwitch Service Modules Stacking the Cisco EtherSwitch Service Modules This section provides this information: • Planning the Stack • Stack Cabling Considerations • Connecting to the Cisco StackWise Ports Planning the Stack You can stack two Cisco EtherSwitch service modules in a stack by connecting them through their Cisco StackWise ports. Before connecting the Cisco EtherSwitch service modules in a stack, observe these planning considerations: • Length of cable. Depending on the configurations you have, you might need different sized cables. If you require a 0.5-meter (0.6-ft) cable, 1-meter (3.3-ft) cable, or 3-meter (9.8-ft) cable, you can order it from your Cisco supplier. • Make sure that there is access to the front of the rack if you are planning to stack the Cisco EtherSwitch service modules. • For concepts and procedures to manage Cisco EtherSwitch service module stacks, see the Catalyst 3750 Switch Software Configuration Guide, Cisco IOS Release 12.2 at the following URL: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3750/index.htm • See these sections for additional considerations: the "Powering Considerations for a Switch Stack" section on page 18-14 and the "Stack Cabling Considerations" section on page 18-15. Note Creating a stack of multiple Catalyst 3750 switch modules or service modules (using the stacking ports on the Cisco StackWise EtherSwitch service modules) requires specific cabling. Stack Cabling Considerations The illustrations in this section display cabling configuration examples that show the stack bandwidth and possible stack partitioning. Figure 18-8 shows a stack of Cisco EtherSwitch service modules and Catalyst 3750 switches that provides full bandwidth and redundant connections. OL-2485-20 Cisco Network Modules Hardware Installation Guide 18-15