Stacking 3750 switches

Posted on 2011-04-19
Last Modified: 2012-05-11
I am stacking 2 3750 switches.  I am adding a new switch with a newer ios version.  Will this be
 a problem ?  Would it be a good idea to downgrade the ios of the new switch to match  the ios of
the older switch?

Here are the ios versions that im running:

c3750-ipbase-mz.122-35.SE5 (existing / master)
c3750-ipbase-mz.122-50.SE (new 3750 / switch to be added)

Question by:coronacomp
    LVL 8

    Accepted Solution

    We ran into issues with the stack in the past when different ios version and firmware were used so I would suggest that your switches should have the same version.

    Author Comment

    any downfall with down grading the newer switch with an older ios to match existing (primary switch)?
    LVL 8

    Assisted Solution

    The downfall is that if the new IOS has a fix of a particular issue, you won't have that fix.  If your existing switch is functioning as it should, I wouldn't think that it would be an issue.
    LVL 79

    Expert Comment

    I would upgrade the existing stack first.
    They are "supposed" to automatically upgrade themselves to the newer one added to the stack, but it doesn't always work.

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