clear span statistics

The following example clears STP statistics from VLAN 1.

device# clear span statistics vlan 1
device# show span detail vlan 1 lag 40 
======================================================================
VLAN 1 - SPANNING TREE (IEEE 802.1D) ACTIVE
======================================================================
Bridge identifier    - 0x800000a0c9c002a0
Active global timers - Hello: 0 
Topology change not set, Topology change detected not set, Topology change time 35
Number of topology changes: 0


Port lg40 is FORWARDING
  Port - Path cost: 4, Priority: 128, Port Identifier:128.3111, Root: 0x800000a0c9c002a0 Root Bridge Priority:32768
  Designated - Bridge: 0x800000a0c9c002a0, Priority:32768, Interface: 3111, Identifier:128.3111, Path cost: 0 
  Active Timers - Hold: 0
  BPDUs - Sent: 1916, Received: 4464