This attribute displays the number of discarded packets that can not
be forwarded into the subnet because of subnet congestion.
Number of frames from link discarded due to failure in forwarding
a packet from Vc into the subnet.- This attribute is increased when
packet forwarding fails to forward a packet into the subnet. If a
frame is split into multiple subnet packets and a partial packet has
to be discarded, all subsequent partial packets that have not yet been
delivered to the subnet will be discarded as well.