Cisco 3750 Stack

[TimLaffan]

Hi All,

We currently have x2 Cisco 3750 stacked as a collapsed core, we would like to introduce and another switch into the stack but keep reading conflicting information on the best way how to-do this:

Either Connect it HOT, or power of the switches, connect the switches and bring them back up

I would like to follow the HOT method as it is a production unit, so before if do-so wanted to get your opinions

Thanks in advance

[Ton V Engelen]

Hi, to do this hot:

check te switch priorities of the switches in the stack.

Make sure switch 1 gets or has lets say prio 15

Make sure switch 2 get or has a lower prio, like 13.

Pre configure the new switch with prio 11 (or lower)

Now hook it up.

Because of the switch priorities (prio 15 will be master) , a stack master recalc will not happen and you can do this live.

I did this hookup without any downtime.

[Reza Sharifi]

Tom,

Follow this link to add a switch to your stack.

I would recommend doing it in an outage windows as you never know what can go wrong

http://www.cisco.com/en/US/products/hw/switches/ps5023/products_configuration_example09186a00807811ad.shtml#stack3

HTH

Reza