marco ghidinelli wrote:
note that drop means 'losing correct data already received'. so when we
drop, we need a retransmission, so we are wasting bandwidth.
Yea - it's a pain, but then you can't rely on anywhere else to do it apart from your ISP/Teleco - who will fill a big buffer first.
You still loose the bandwidth of the retransmit - I loose the drop aswell, but then I have to back off X% anyway and the drop sort of comes out of that.
btw, simulate a drop is easy just send two (or three - it depends on the implementation of the tcp stack) duplicate ack that means: we have received out of order packet so please retransmit.
Do you have to do do it differently for servers that do sacks, or do they still react to DUPs ?
Andy.
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