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Catalyst 3750 Switch Software Configuration Guide
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Chapter 5 Managing Switch Stacks
Understanding Switch Stacks
Switch Stack Management Connectivity
You manage the switch stack and the stack member interfaces through the stack master. You can use the
CMS, the CLI, and SNMP and CiscoWorks network management applications. You cannot manage stack
members on an individual switch basis.
These sections provide switch stack connectivity information:
• Connectivity to the Switch Stack Through an IP Address, page 5-14
• Connectivity to the Switch Stack Through an SSH Session, page 5-14
• Connectivity to the Switch Stack Through Console Ports, page 5-14
• Connectivity to Specific Stack Members, page 5-14
Connectivity to the Switch Stack Through an IP Address
The switch stack is managed through a single IP address. The IP address is a system-level setting and is
not specific to the stack master or to any other stack member. You can still manage the stack through the
same IP address even if you remove the stack master or any other stack member from the stack, provided
there is IP connectivity.
Note Stack members retain their IP addresses when you remove them from a switch stack. To avoid a conflict
by having two devices with the same IP address in your network, change the IP address or addresses of
the switch that you removed from the switch stack.
For related information about switch stack configurations, see the “Switch Stack Configuration Files”
section on page 5-12.
Connectivity to the Switch Stack Through an SSH Session
The Secure Shell (SSH) connectivity to the switch stack can be lost if a stack master, running the
cryptographic version of the SMI or EMI software, fails and is replaced by a switch that is running a
noncryptographic version of the software. We recommend that a switch running the cryptographic
version of the SMI or EMI software be the stack master. Encryption features are unavailable if the stack
master is running the noncryptographic version of the SMI or EMI software.
Connectivity to the Switch Stack Through Console Ports
You can connect to the stack master through the console port of one or more stack members.
Be careful when using multiple CLI sessions to the stack master. Commands that you enter in one session
are not displayed in the other sessions. Therefore, it is possible that you might not be able to identify the
session from which you entered a command.
We recommend using only one CLI session when managing the switch stack.
Connectivity to Specific Stack Members
If you want to configure a specific stack member port, you must include the stack member number in the
CLI command interface notation. For more information, see the “Using Interface Configuration Mode”
section on page 11-7.
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