08-14-2015 02:41 AM - edited 03-08-2019 01:22 AM
What is the maximum number of 3750 switches that can be stacked?
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08-14-2015 05:40 AM
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As Mark has noted, up to nine units. If using the 3750X, as Shaps has noted, you can connect up to 4 units into a power stack, but you can, I believe, have more than one power group per (data) stack. (I also recall, you can have up to nine units connect to the same RPS.)
As Karsten has noted, there are reasons you might not want to stack up to the max. Large stacks are "slow" at the command line. Also, if using StackWise (not StackWisePlus) 3750s, remember all stack members put ALL their traffic on the stack ring and it's also removed by the source stack member. StackWise will load up "faster" than StackWisePlus, and physically, it's only half the bandwidth too.
08-14-2015 02:48 AM
9 altogether but most people usually just stack up to 6, I have heard of issues with different features once you go past that and problems with the stacking themselves depending on platform an ios version
08-14-2015 02:53 AM
another point to consider is the power stacking can only go up to 4, from what I remember
08-14-2015 03:18 AM
These (and many more) questions can be answered by looking at the documentation:
Today, I typically don't stack more then two (sometimes four) devices together. With that you can still build multi-chassis Etherchannels but you limit your failure-domains. Some years ago I liked the idea of configuring hundreds of ports through a single session. But if you have a bug or other problem with the stacking itself, it's possible that you lose all your ports at once. I had to learn this the hard way ...
08-14-2015 05:40 AM
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
As Mark has noted, up to nine units. If using the 3750X, as Shaps has noted, you can connect up to 4 units into a power stack, but you can, I believe, have more than one power group per (data) stack. (I also recall, you can have up to nine units connect to the same RPS.)
As Karsten has noted, there are reasons you might not want to stack up to the max. Large stacks are "slow" at the command line. Also, if using StackWise (not StackWisePlus) 3750s, remember all stack members put ALL their traffic on the stack ring and it's also removed by the source stack member. StackWise will load up "faster" than StackWisePlus, and physically, it's only half the bandwidth too.
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