Hi all,
For some time I have only been interested in the congestion response of the
different TCP congestion control algorithms, and the way it balances flow
throughput to available capacity, packet drop statistics, etc.
However, now I need to see how well TCP tackles retransmissions, e.g. with
SACK. When I inspect the event trace file, dropped packets are "never"
retransmitted, in that ns-2 seems to increment the sequence numbers (both
per flow and per simulation) all the time,
>>>>>>>making it impossible to know WHEN a retransmission is performed.
<<<<<<<<<
Is this a correct observation? If yes, are there any workarounds? If
incorrect, how *do* I find the retransmission event, and e.g. how *many*
packets are duplicated/retransmitted (SACK vs. non-SACK)?
best regards
Arne
