>In general the packet pair
>algorithm is very hard to apply to TCP in its startup phase. The reason is that
>because of the receiver delaying the ACKs, two packets sent back to back (as
>required by packet pair) wouldn't necessarily cause the receiver to respond
>with an ACK for each immediately. In fact the ACK spacing can be such that you
>end up grossly *underestimating* your bandwidth.
Assuming no past traffic has gone between the host pair to give you bandwidth-
delay measurements to remember (say in a routing table), would it appropriate
to use something other than TCP (say ICMP echo request) to get the packet pair?
Apologies in advance if I am violating a separation of powers ;)
Joel
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