adding 2 switches to existing stack of MS425-32

[GL]

I have a core of 2 MS425-32 in a stack using the 40 gig QSFP ports.

I want to add 2 more to the stack over SMF.  Should be supported on this model.

I can't have existing stack problems since it is running Aggrs and is the core of my network.

What is the procedure to keep current stack running and ad the 2 switches to it without downtime.

My thoughts from Cisco catalyst side is connect added switch while powered off.

It should get added to running stack? No problems?

I have the switches to be added already configured to use the QSFP ports as stacking ports.

Please let me know of any gotchas.

Thanks,

Greg

[DarrenOC]

Are you able to perform this during an agreed outage window just to cover yourself?

Varied experiences reported here:

https://community.meraki.com/t5/Switching/Adding-a-switch-to-an-existing-stack/m-p/22615

[alemabrahao]

Here is all the steps: https://documentation.meraki.com/MS/Stacking/Switch_Stacks#Adding_a_new_member_to_the_stack