S5#sh run | b span
spanning-tree mode mst
spanning-tree extend system-id
!
spanning-tree mst configuration
 name ProbA
 revision 1
 instance 1 vlan 10
!
spanning-tree mst 1 priority 0
!

S6#sh run | b span
spanning-tree mode mst
spanning-tree extend system-id
!
spanning-tree mst configuration
 name ProbA
 revision 1
 instance 1 vlan 10
!
spanning-tree mst 0 priority 0
!