We have and existing switch in the dashboard configured doing it's thing but I have bought a new switch and want to physical stack them to together.   Is this straight forward or do I need to take steps so I don't wipe the existing config from the old switch?   I have bought the stacking cables and ready to stack them but it just wanted to double check that connecting new switch and inserting the stacking cables, then creating the stack in the dashboard it won't wipe the config from the existing switch.   Also do both switches need to be powered off to connected the stacking cables or can the switches be powered on? ... View more