Routing and switching learn eighth day: SW1 become the main root of all VLAN, SW2 become the root of all VLAN

SWl:
<HW-SWl> // The system SYS view
[HW-SW1] stp mode stp // STP spanning tree
zero [HW-SW1] stp priority 0 // STP spanning tree priority

SW2:
<HW-SW2> // The system SYS view
[HW-SW2] stp mode stp // spanning tree to the STP
[HW-SW2] // the STP 4096 STP spanning tree priority priority 4096

Change before SW3:
<HW-SW3> // See DIS STP spanning tree Brief Overview
MSTID the STP Port Role State Protection
0 the GigabitEthernet0 / 0 /. 1 the ROOT FORWARDING NONE
0 the GigabitEthernet0 / 0 /. 3 ALTE DISCARDING NONE
0 the GigabitEthernet0 / 0/10 DESI FORWARDING NONE
0 GigabitEthernet0 / 0/11 DESI FORWARDING NONE
0 GigabitEthernet0 / 0/12 DESI FORWARDING NONE
after SW3 changes:
<HW-SW3> DIS // Displays the spanning tree stp the Brief Overview
MSTID Role STP Port State Protection
0 GigabitEthernet0 / 0/1 ALTE NONE DISCARDING
0 the GigabitEthernet0 / 0 /. 3 the ROOT FORWARDING NONE
0 the GigabitEthernet0 / 0/10 DESI LEARNING NONE
0 the GigabitEthernet0 / 0 /. 11 DESI LEARNING NONE
0 the GigabitEthernet0 / 0/12 is DESI LEARNING NONE
<HW-SW3 are>