Cisco Systems 3750E manual Scenario Result

Chapter 5 Managing Switch Stacks

Understanding Switch Stacks

Table 5-1	Results of Comparing the Provisioned Configuration with the Provisioned Switch (continued)
Scenario			Result
The stack member number is			The switch stack applies the default
not found in the provisioned			configuration to the provisioned switch
configuration.			and adds it to the stack.
			The provisioned configuration is changed
			to reflect the new information.
The stack member number of		The stack master assigns a new stack member	The switch stack applies the provisioned
the provisioned switch is in		number to the provisioned switch.	configuration to the provisioned switch
conflict with an existing stack		The stack member numbers and the switch types	and adds it to the stack.
member.		match:	The provisioned configuration is changed
		1. If the new stack member number of the	to reflect the new information.
		provisioned switch matches the stack
		member number in the provisioned
		configuration on the stack, and
		2. If the switch type of the provisioned switch
		matches the switch type in the provisioned
		configuration on the stack.
		The stack member numbers match, but the	The switch stack applies the default
		switch types do not match:	configuration to the provisioned switch
		1. If the stack member number of the	and adds it to the stack.
		provisioned switch matches the stack	The provisioned configuration is changed
		member number in the provisioned	to reflect the new information.
		configuration on the stack, but
		2. The switch type of the provisioned switch
		does not match the switch type in the
		provisioned configuration on the stack.
The stack member number of			The switch stack applies the default
the provisioned switch is not			configuration to the provisioned switch
found in the provisioned			and adds it to the stack.
configuration.

If you add a provisioned switch that is a different type than specified in the provisioned configuration to a powered-down switch stack and then apply power, the switch stack rejects the (now incorrect) switch stack-member-numberprovision type global configuration command in the startup configuration file. However, during stack initialization, the nondefault interface configuration information in the startup configuration file for the provisioned interfaces (potentially of the wrong type) is executed. Depending on the differences between the actual switch type and the previously provisioned switch type, some commands are rejected, and some commands are accepted.

For example, suppose the switch stack is provisioned for a 48-port switch with Power over Ethernet (PoE), the configuration is saved, and the stack is powered down. Then a 24-port switch without PoE support is connected to the switch stack, and the stack is powered up. In this situation, the configuration for ports 25 through 48 is rejected, and error messages appear during initialization. In addition, any configured PoE-related commands that are valid only on PoE-capable interfaces are rejected, even for ports 1 through 24.

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-02 5-9