Slow file transfer

Lowell Gilbert freebsd-questions-local at
Tue Nov 8 13:06:36 GMT 2005

Olivier Nicole <on at> writes:

> > Could be a duplex mismatch.  Look for collision statistics.
> I checked that already,

Okay, then you need to look at the traffic.  In particular, you'll
need to keep an eye on the TCP send window as the transfer progresses.

>                         and as router1 must cross router2 to reach the
> FTP server, if there was a network issue between router2 and the FTP
> server, both transfer would be slow, not only the on from router2.

That's not necessarily the case.  The timing changes, and it is quite
often enough to keep the next packet from stepping on the toes of the
response to the previous one.  

Be well.
Lowell Gilbert, embedded/networking software engineer, Boston area

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