The state of the FDB entry. The meanings of the values are :
unknown(1) : the MAC address has not yet been learned by the switch
but has only been seen as a destination address
forward(3) : the MAC address has been learned by the switch
flood(4) : the MAC address is a multicast destination address
trunk(6) : frames with this MAC address are forwarded to trunk
group
vir(7) : frames with this MAC address are forwarded for L3
processing