How to make a root switch of STP/RSTP network manually?


  • Root switch is selected by Bridge Priority and MAC address
  • STP/RSTP default Bridge Priority is 32768
  • Choose a switch and manually change the Bridge Priority parameter to make its ID lowest than other switches

CLI command:
switch_a> enable
switch_a# configure terminal
switch_a(config)# bridge 1 priority 4096

CLI show STP bridge priority:

GUI show STP and modified bridge priority: