Implementing Cisco IP Switched Networks (SWITCH v2-0) (#155)

You have added a new switch to a Cisco StackWise stack. If the previous master switch remains the master switch after the master election, which action does the master take?

It clears the MAC table of the stack and relearns the attached devices.
It removes any Layer 3 configuration on the new switch to maintain normal Layer 2 functionality on the stack.
It checks the IOS and running configuration of the new switch and updates them if necessary to match the other switches in the stack.
It suspends traffic forwarding until the new switch is updated with the current running configuration of the stack.