Maximum number of 3850 switches in a power-stack.

[Stephen Carville]

I have a 3850 stack with five switches. The ports are connected in a ring but I cannot get all five switches to exist in the same power stack. I thought that I could have up to five switches in a power-stack with a ring topology but darned if I can get the switches to agree.

Is the limit really five?

[Leo Laohoo · Accepted solution]

I believe the limit of the power stack is four.

[Julio E. Moisa · Accepted solution]

Hi

I agree with Leo, the maximum is 4. If you have 5 switches you can create 2 power stack only. 

Q.    How many Cisco Catalyst 3850 switches can make up a Cisco StackPower stack?

A.     Up to four switches can become part of the same Cisco StackPower stack in a ring topology (Figure 1).

Figure 1.      Cisco StackPower

Q.    Why is Cisco StackPower restricted to four switches?

A.     It is limited by cable gauge and maximum current draw allowed.

Reference: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3850-series-switches/qa_c67-722110.html

Also you can check this link:

https://supportforums.cisco.com/document/12575126/how-form-catalyst-3850-data-stack-and-power-stack

Hope it is useful

:-)

[Stephen Carville]

Thank you.  I don't know where I got the notion it was five...

[Julio E. Moisa]

Hi Stephen,

You are welcome,

Have a great day.

:-)