STP STATES & PORT ROLES
RSTP
CST/PVST
FORWARDING
SEND & RECIEVE DATA FRAMES
DISCARDING
INCOMING FRAMES ARE DROPPED, NO MAC-ADDRESS LEARNED
PORT ROLES
ROOT PORT(in both)
BEST PATH COST TO ROOT
ALTERNATE(in RSTP)
ALTERNATE PATH TO ROOT
BACKUP(in RSTP)
REDUNDANT CONNECTION TO SEGMENT WHERE ANOTHER SWITCH PORT ALREADY EXISTS
DESIGNATED(in both)
PORT ON A LAN SEGMENT CLOSEST TO ROOT
BLOCKING(in CST/PVST)
PORTS THAT ARE NEITHER ROOT NOR DESIGNATED