How add 3850 Switch to existing stack

[patrickbyrne456305724]

Hi there,

Can someone help me, I have been assigned to add a 3rd 3850 switch to existing stack, can this be done without the whole stack being rebooted?

I eagerly await your response and appreciate your help in advance!!

[Jaderson Pessoa]

Hello,

If you add a new switch under a existent stack.. Just check priority to this not take the root. The switches wont rebooted if the priority is correctly to do not swap the actual root. :)

[patrickbyrne456305724]

Many thanks for the response,

So I just need to set the the priority low so it does not become the master? What about the software version; if it is of the later version that the other 2 in the stack would it reboot the other 2 in the stack or cause problems. Is there a step by step guide configuration you can link too?

Kind regards

[Jaderson Pessoa · Accepted solution]

Hello,

It is recommend that all switches running the same IOS version, so.. until add it at stack, updated it.

Look this guide in other post: https://community.cisco.com/t5/networking-documents/how-to-form-a-catalyst-3850-data-stack-and-power-stack/ta-p/3156083

Note: The switch to be added to the stack must be off. Otherwise, the hole stack will reload.

[patrickbyrne456305724]

Many thanks Jaderson for all your help, its much appreciated!!

[Jaderson Pessoa]

YOU'RE WELCOME :)