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Cisco EtherSwitch Service Modules Feature Guide
Information About the Cisco EtherSwitch Service Modules
12
Cisco IOS Release 12.2(25)SEC
Cisco StackWise Concepts
This section describes the concepts applicable to switch stacks of Cisco EtherSwitch service modules.
• Overview of Switch Stacks, page 12
• Switch Stack Membership, page 13
• Stack Master Election and Re-Election, page 14
• Switch Stack Bridge ID and Router MAC Address, page 15
• Stack Member Numbers, page 15
• Stack Member Priority Values, page 16
• Switch Stack Software Compatibility Recommendations, page 17
• Stack Protocol Version Compatibility, page 17
• Major Incompatibility Between Cisco EtherSwitch Service Modules, page 17
• Minor Incompatibility Between Cisco EtherSwitch Service Modules, page 18
• Switch Stack Configuration Files, page 18
• Switch Stack Management Connectivity, page 19
• Management Connectivity to the Switch Stack Through an IP Address, page 19
• Management Connectivity to the Switch Stack Through an SSH Session, page 19
• Management Connectivity to the Switch Stack Through Console Ports, page 19
• Management Connectivity to Specific Stack Members, page 20
• Accessing the CLI of a Specific Stack Member, page 20
• Accessing the CLI of a Specific Stack Member, page 20
Overview of Switch Stacks
You can manage the Cisco EtherSwitch service modules as a single unit by connecting them through the
StackWise ports of a 24-port Cisco StackWise EtherSwitch service module, and managing the switch
stack through a Cisco router. For information about which Cisco routers support the Cisco EtherSwitch
service modules, see the Cisco Network Modules Hardware Installation Guide.
Note • You can install only one Cisco StackWise EtherSwitch NME-XD-24ES-1S-P service module in a
single router chassis.
• You can install up to two Cisco EtherSwitch service modules in a Cisco 3845, Cisco 3825, Cisco
2851, or Cisco 2821 router or up to four Cisco EtherSwitch NME-16ES-1G-P service modules in
the Cisco 3745 or Cisco 3845 routers.
• Installing more than two Cisco EtherSwitch service modules in a router chassis requires specific
cabling. For information about cabling multiple Cisco EtherSwitch service modules, see the Cisco
Network Modules Hardware Installation Guide at the following URL:
http://www.cisco.com/en/US/products/hw/modules/ps2797/products_module_installation_guide_b
ook09186a00802d2910.html