Cisco Systems 3750E manual Switch Stack Software Compatibility Recommendations

Chapter 5 Managing Switch Stacks

Understanding Switch Stacks

Note If the switch stack does not contain a provisioned configuration for a new switch, the switch joins the stack with the default interface configuration. The switch stack then adds to its running configuration a switch stack-member-numberprovision type global configuration command that matches the new switch.

For configuration information, see the “Provisioning a New Member for a Switch Stack” section on page 5-23.

Effects of Replacing a Provisioned Switch in a Switch Stack

When a provisioned switch in a switch stack fails, is removed from the stack, and is replaced with another switch, the stack applies either the provisioned configuration or the default configuration to it. The events that occur when the switch stack compares the provisioned configuration with the provisioned switch are the same as those described in the “Effects of Adding a Provisioned Switch to a Switch Stack” section on page 5-8.

Effects of Removing a Provisioned Switch from a Switch Stack

If you remove a provisioned switch from the switch stack, the configuration associated with the removed stack member remains in the running configuration as provisioned information. To completely remove the configuration, use the no switch stack-member-numberprovision global configuration command.

Hardware Compatibility and SDM Mismatch Mode in Switch Stacks

The Catalyst 3750-E switch supports only the desktop Switch Database Management (SDM) templates.

All stack members use the SDM template configured on the stack master.

Version-mismatch (VM) mode has priority over SDM-mismatch mode. If a VM-mode condition and an SDM-mismatch mode exist, the switch stack first attempts to resolve the VM-mode condition.

You can use the show switch privileged EXEC command to see if any stack members are in

SDM-mismatch mode.

For more information about SDM templates and SDM-mismatch mode, see Chapter 8, “Configuring SDM Templates.”

For information about mixed hardware stacks, see the Cisco Software Activation and Compatibility Document on Cisco.com.

Switch Stack Software Compatibility Recommendations

To ensure complete compatibility between stack members, use the information in this section and also in the “Hardware Compatibility and SDM Mismatch Mode in Switch Stacks” section on page 5-10.

All stack members must run the same Cisco IOS software image and feature set to ensure compatibility between stack members. For example, all stack members should run the cryptographic universal software image and have the IP services feature set enabled for Cisco IOS Release 12.2(35)SE2 or later.

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

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