A switch stack has up to n stack members, including the manager, connected through their stacking ports. A switch stack always has one stack manager.
A standalone switch is a switch stack with one stack member that also operates as the stack manager. You can connect one standalone switch to another to create a switch stack containing two stack members, with one of them being the stack manager. You can connect standalone switches to an existing switch stack to increase the stack membership.
If you replace a stack member with an identical model, the new switch functions with exactly the same configuration as the replaced switch, assuming that the new switch is using the same member number as the replaced switch. By default, 200 Series configures the new member.
The operation of the switch stack continues uninterrupted during membership changes unless you remove the stack manager.