[Samba] Disconnect problem

[jra at dp.samba.org]

On Sat, Nov 30, 2002 at 03:53:15PM -0300, cantisan wrote:
> Samba and Win2k just don't seem to want to work together.  I get disconnects
> after about 13MB of data transfer, and the Win2k box just loses the share as
> if it were disconnected.  Re-establishing the share works, but data transfer
> of large files or working with large amounts of data is impossible.  From
> the amount of traffic on this newsgroup regarding WinXP and Win2K problems
> with Samba, I think this problem is common - although a solution hasn't
> cropped up, or I haven't found one in my travels.
> 
> Here's my contribution to finding the problem:
> I put a sniffer on the net and see that when this disconnect occurs, the
> Samba server sends a set of 5 or 6 data packets to the Win2K box, and the
> Win2k box sends back ACK packets for them. [all normal so far..]  However,
> the Linux (RedHat 7.3) box doesn't appear to get the last ACK packet (or
> isn't processing it - since tcpdump is picking it up it IS being
> received...), as it resends the last data packet (same tcp seq number).  The
> Windows box ACKS that packet again, and this is repeated about 6 or 7 times
> before the Windows box decides that it's not worth the trouble and just
> stops communicating (no attempt to FIN the connection either...)

Check your network hardware. Where on the net are you doing
the tcpdump ? The best (but most difficult) way to test
this is to do a tcpdump on a hub at the client, and on
a hub at the server, to see if the packets are being lost.

Jeremy.