On Sun, 24 Jul 2011, Martin T wrote:
So I guess duplex mismatch does affect UDP traffic as well? And why are
upload/download so unequal?
Because a duplex mismatch affects differently depending on direction.
The party which is in half duplex will see traffic coming the other
direction as a late collission and will retransmit the packet from the
switch/router buffer. The party in full duplex will never retransmit, so
that packet is lost.
It's also a timing thing, a duplex mismatch is only a problem if there are
packets being sent simultaneously in both directions. If you manage to
time the traffic exactly so this never happens, then you won't see any
packet loss at all.
--
Mikael Abrahamsson email: [email protected]
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