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.
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.
Depends whether you're trying to provide redundancy. You can create a ring with 3 cables and 3 3560s; you'll need to run some variant of STP to block one of the links.
BTW, depending on the actual model, you can use copper cables between copper ports or perhaps the special 50cm 3560 SFP Interconnect Cable between gig SFP ports.
- . connect one to each other then the top one to the bottom one - like the 3750s stacking stacks -- or is it just one cable between each device no cable between top and bottom
What are you trying to do?
If you want to simply extend VLAN's across the switches to add more ports, then just link one switch (primary) to each of the other with a trunk which includes the VLAN's you want to appear on the other switches, create the appropriate VLAN's on the other two swiches, and you should be good to go.
If you want to form a "chassis" or simgle virtual switch - you can't. 3560's don't support stacking, and therefore will always appear as three distinct individual switches.
If you want to make redundancy, you could make a ring design, - switch one links to switch two, switch two links to switch three, switch three links back to switch one - but you'd need to watch for spanning-tree issues, because one of the paths would have to be in blocking mode to stop loops.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...