clear mstp statistics

The following example clears the MSTP statistics from instance 0.

device# show mstp detail 
  detail          displays detailed mstp information
device# show mstp detail 0
MSTP Instance 0 (CIST) - VLANs: 1 
----------------------------------------------------------------------------
  Bridge: 800000a0c9c002a0 [Priority 32768, SysId 0, Mac 00a0c9c002a0]
  FwdDelay 15, HelloTime 2, MaxHops 20, TxHoldCount 6, ForceVersion 3
Number of topology changes: 37
Last topology change occured 13 minute(s) 46 second(s)  ago on lg30

Port 1/1/1 - Role: DESIGNATED - State: FORWARDING
  PathCost 20000, Priority 128, OperEdge F, OperPt2PtMac F, rcvdInternal F, Boundary F
  Designated   - Root 800000a0c9c002a0, RegionalRoot 800000a0c9c002a0,
                 Bridge 800000a0c9c002a0, ExtCost 0, IntCost 0
  ActiveTimers - helloWhen 1
  MachineState - PRX-DISCARD, PTX-IDLE, PPM-SENDING_RSTP, PIM-CURRENT
                 PRT-ACTIVE_PORT, PST-FORWARDING, TCM-ACTIVE
  BPDUs        - Rcvd MST 0, RST 0, Config 0, TCN 0
                 Sent MST 566, RST 0, Config 0, TCN 0

device# clear mstp statistics instance 0
device#
device# show mstp detail 0              
MSTP Instance 0 (CIST) - VLANs: 1 
----------------------------------------------------------------------------
  Bridge: 800000a0c9c002a0 [Priority 32768, SysId 0, Mac 00a0c9c002a0]
  FwdDelay 15, HelloTime 2, MaxHops 20, TxHoldCount 6, ForceVersion 3
Number of topology changes: 0

Port 1/1/1 - Role: DESIGNATED - State: FORWARDING
  PathCost 20000, Priority 128, OperEdge F, OperPt2PtMac F, rcvdInternal F, Boundary F
  Designated   - Root 800000a0c9c002a0, RegionalRoot 800000a0c9c002a0,
                 Bridge 800000a0c9c002a0, ExtCost 0, IntCost 0
  ActiveTimers - helloWhen 1
  MachineState - PRX-DISCARD, PTX-IDLE, PPM-SENDING_RSTP, PIM-CURRENT
                 PRT-ACTIVE_PORT, PST-FORWARDING, TCM-ACTIVE
  BPDUs        - Rcvd MST 0, RST 0, Config 0, TCN 0
                 Sent MST 578, RST 0, Config 0, TCN 0