Spanning Tree Status

Role:
Desg = Designated port
Root = Root port
Blocking = Blocking
Learn = Learning
List = Listening
Alt = Alternate port (Rapid Spanning Tree only)
Backup = Backup port (Rapid Spanning Tree only)
Discard = Discarding (Rapid Spanning Tree only)



Sts:
FWD = Forwarding
BLK = Blocking

Cost:
The amount the cost field of the BPDU will be increased upon entering the port.

Prio.nbr = the port ID
The Port ID is a two part number composed of the priority (128 by default) followed by the port number.

Type: Rapid Spanning Tree only
Edge = a port that connects to a non-spanning tree device.
P2P = full duplex link that connects to another spanning tree device

Shared = half duplex link that connects to another spanning tree device.

http://www.cisco.com/warp/public/473/146.html

http://www.cisco.com/univercd/cc/td/doc/product/rtrmgmt/sw_ntman/cwsimain/cwsi2/cwsiug2/vlan2/stpapp.htm