#36 Packet discard

[Carlos Henrique]

Please consider the following topologies:

1- a desktop (as iperf client) connected in an access point via UTP cable and a notebook (as iperf server) wireless connected in this access point;

2- a desktop (as iperf client) connected in a notebook (as iperf server) via UTP cable both FE interfaces.

What is the reason there are a lot of packet discards in a iperf test in topology 1 from the client in wired side to the server in wireless side? For example iperf -c x.x.x.x -i1 -t5 -u -b11m (wired client side) and
iperf -s -u (wireless server side) in a 802.11b connection with data rate of 11 Mbps that normally has throughput of 6.5 Mbps showing about 33% of packet discard if the same does not occur in topology2 with the server and client in the wired side, for example iperf -c x.x.x.x -i1 -t5 -u -b200m (2x FE capacity configured in notebook client side) and
iperf -s -u (desktop server side) with no packet discard?
Thank you.