!
! Configuration for S3 (Non-Root Switch with Alternate Blocking Port)
!
hostname S3
!
spanning-tree mode rapid-pvst
!
vlan 10
 name Staff
!
interface FastEthernet0/10
 description Access Port to PC2
 switchport mode access
 switchport access vlan 10
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface GigabitEthernet0/1
 description Trunk to S1
 switchport mode trunk
!
interface GigabitEthernet0/2
 description Trunk to S2 (Alternate Blocking Port)
 switchport mode trunk
!
end