I have a stack of Catalyst 3750. I want to add another Catalyst 3750 (Same IOS) to the stack. when I connect the switch to the stack, will this interrup the current users connected to the stack? Is there any steps I need to do before connecting the switch to the stack?
I added a 3750 to a stack yesterday. If your existing 3750 hasn't had any "switch" priority commands entered, it will become the master. You'll need to make sure that the existing switch gets the stack cable connected to port 1, and port 2 on the new 3750. I didn't notice any downtime, but as always, I would suggest doing it during it after hours.
You will have to go in and set specific port commands, such as cdp, portfast, vlan, switchport modes, etc.
I think the master is supposed to copy its IOS image over to the new member if the member does not have the correct IOS. I have not tried it that way though. I always make sure the new member has the correct image ahead of time.
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