Cisco 9300 Stack

[Cconchap]

Hi,

I am setting up a stack of 4 Switch 9300s.
I would like to know how I can do so that when the switch with the active role turns off and returns, it will be the active switch again.
I did the test with the command

stack-mac persistent timer 0

But when returning, the active is still switch 2.

[balaji.bandi · Accepted solution]

here is stacking step by step :

https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9300-series-switches/white-paper-c11-741468.html

Switch become master based on the priority ( when the switch offline, slave will take over the role of master - but when master come back it not get master role, it will be part of stack only)

[Leo Laohoo]

That is now how stacking works. 

When a stack master reboots/crash, the secondary member gets "promoted" to primary.  The stack master joins the stack as a secondary/tertiary or member (depending on the size of the stack). 

The logic behind this is to ensure a minimum amount of outage for the rest of the stack. 

The only way to ensure when the master switch returns as the master is to reboot the entire stack manually.  And this is very disruptive.