> I am looking for a way to set the initial slow start threshold to an=20
> appropreate value for the delay and bandwidth of the link.
...
> The "Ongoing TCP Research Related to Satellites" draft suggests:
> "Hoe [Hoe96] proposes using the packet-pai algorithmr [Kes91] to determine =
> a more
> appropriate value for ssthresh."
...
> Having consulted these documents it is still not clear to me exactly how=20
> TCP should determine the bandwidth of the link. Could someone explain=20
vern paxson's thesis (forget the pointer but vern should also be on
this list) has a chapter on measuring bottleneck bandwidth, and it
explains how packet-pair works and also its limitations.
<PROMO>
if you want to make experiments on how bandwidth estimators work,
the "dummynet" stuff at http://www.iet.unipi.it/~luigi/ip_dummynet/
is quite appropriate. It has been recently integrated with a packet
filter and it is much easier and flexible than it was 2 years ago.
</PROMO>
cheers
luigi
-----------------------------+--------------------------------------
Luigi Rizzo | Dip. di Ingegneria dell'Informazione
email: [email protected] | Universita' di Pisa
tel: +39-50-568533 | via Diotisalvi 2, 56126 PISA (Italy)
fax: +39-50-568522 | http://www.iet.unipi.it/~luigi/
_____________________________|______________________________________
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