Switch Stacks

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Aug 3rd, 2010
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We already have a couple of WS-C3750-48PS-S stacked together on our LAN. Would it be possible to add WS-C3750V2-48PS-S to the stack without encountering any issues. I intend to use the same IOS version and feature sets.


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Nagaraja Thanthry Tue, 08/03/2010 - 12:44
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You can certainly add another switch to the stack without any issues. Please

follow the proper procedure while adding the new switch to the stack.

-- Turn off the new switch

-- Make appropriate connections

-- Turn on the new switch

That should address this issue.

Hope this helps.



krahmani323 Tue, 08/03/2010 - 12:52
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Hello Frank,

Yes it would be possible :

Cisco StackWise technology unites up to nine  individual switches in a single logical unit, using special  stack-interconnect cables and stacking software. The individual switches  can be any combination of Cisco Catalyst 3750, 3750 v2, and 3750-E  Series Switches.

( => http://www.cisco.com/en/US/partner/prod/collateral/switches/ps5718/ps5023/data_sheet_c78-531031.html)

There should be no problem as longer as we follow the general conditions and restrictions of managing stacking =>


I think also we have to be careful of this bug imacting some recent IOS releases (12.2(53)SE2        .....):

CSCth67625            Bug Details

C3750V2 stack ports going down after IOS upgrade
Stack ports are flapping continously or some of them stay down.

This has been observed on WS-C3750V2-48PS and WS-C3750V2-24PS switches after upgrading to 12.2(53)SE2.

Downgrading to IOS 12.2(52)SE or older solves the issue completely.

Hope it helps.

Kind regards



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