Such switches are fully compatible, and all featuresįunction properly across the switch stack. Switches with the same Cisco IOS software version have the same stack Switch Master/ Mac Address Version Uptime Current 3750-Stk# show platform stack manager all Your switch stack, you can issue the show platform stack managerĪll command. Software compatibility between the stack members is determined by the Having the same IOS version on a switch before adding it to a stack can save you problems.Ĭisco has a very good document, which contains a full explanation about this:Ĭreation and Management of Catalyst 3750 Switch Stacks Software Compatibility Switches with the same major version numbers probably have the same stack protocol version, but that is not guaranteed. Basically, the switches need to have the same stack protocol version, and only switches with the same IOS version are guaranteed to have that. You should really set the IOS version to be the same before adding a switch to the stack.
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