i have 2 3750 switch in a stack. stack cable connections are; switch1-stack1 to switch2-stack2, switch1-stack2 to switch2-stack1. switch1 is master and switch2 is slave, if i need to add two more switch switch3 and switch4 as slave do i need to shutdown switch1 and switch2? if no need to shutdown, will it not screw up switch1 and switch2 if i remove the stack cable in switch1-stack2 to switch2-stack1 to add switch3 and switch4 then plug the stack cable in switch1-stack2 to switch4-stack1?
No, you need not have to TURN OFF the existing switch while adding a new switch in STACK, cisco 3750 stacking technology has been designed in such a way that when ever you connected a new switch in the stack, it automatically upgrades the IOS to the newly stacked switch. also you don't require any downtime for that new switch, it alone gets rebooted once the IOS is upgraded. you need not bother about the existing switches which is up & running.
things looks so simple but could be dangerous. i just wonder why cisco didn't mention that in the doc, its like leaving it blur if something screw up can just say "i didn't specifically mentioned that didn't i" :0
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