Catalyst 2960s Stacking with different IOS versions

[fuhrersk8]

                   Hello Forum Team;

When adding a new switch with older ios version to an existing stack (flexstack) does the new switch will be able to join the stack?

Thanks in advanced!

[Pierluigi Torriani]

Hi, if your switch is 2960s you can add to stack, and your stack has the future of auto-upgrade  to upgrade all the switches in the stack and make the ios equal.

Check the link below for more detailed infos

http://www.cisco.com/en/US/partner/docs/switches/lan/catalyst2960/software/release/12.2_55_se/configuration/guide/swstack.html#wp1166403

[fuhrersk8]

Hello and thanks for the reply guys;

   Correct.  I just went trhough it. So im upgrading the new switches manually.

Thanks again for your great support.

[Ankur Arora · Accepted solution]

Hi,

In a stack/flexstack all the switches should have exact same IOS version, otherwise there will be a version mismatch on the stack and the new switch will not be able to join the stack.

The following Document contains more info:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/white_paper_c11-578928.html

Thanks

Ankur

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