add configured switch to stack

[Volodymyr Khrystenko]

Hello.

I have the next situation. I have 3850 switch stack of 4 switches. I also have standalone switch, totally configured. Is there any way I could add this standalone switch with saved config?

[Leo Laohoo]

I have 3850 switch stack of 4 switches.

What IOS is your stack running on?  IOS XE 3.2.X only supports up to 4 units of 3850 in a single stack, however, if you upgrade your entire stack to IOS XE 3.3.X you should be able to stack up to nine (9) units to a single stack.

[Leo Laohoo]

I also have standalone switch, totally configured. Is there any way I could add this standalone switch with saved config?

Your standalone switch must have NO CONFIG. 

Your standalone switch must have the same IOS XE version as the current stack. 

Your standalone switch must have the same Feature Set (IP Base, Advanced IP, etc.) as the current stack.

[Jianbin Huang]

Unfortunately, when you add a switch to the exist stack, the new switch became part of the stack, all of it's config will not import to the exist stack, after the new switch provisioned  you must merge the config manually.