Fixed it.

I went to Donald Beckers pages and found a diagnostic/register setting
program for my Ethernet card.  Used it to set the card into 100baseTx,
full-duplex mode and now file transfers are zipping.  I feel that a
similar solution will work for anyone who's facing problems with a
switch, irrespective of what the card is, since switches don't seem to 
auto-negotiate well, as Gaurav pointed out.

http://cesdis.gsfc.nasa.gov/linux/drivers/rtl8139.html

is the page for my Realtek card.

Thanks to all who spent time trying to figure out the problem.

Regards,

-- Raju

>>>>> "Raju" == Raju Mathur <[EMAIL PROTECTED]> writes:

    Raju> Hi, I'm facing a weird problem with my network.  I have
    Raju> three systems (A, B and C) connected to each other using a
    Raju> Nortel switch.  A is a linux box is on a private IP, B is a
    Raju> Linux Masq system (both private and public IP's) and C is
    Raju> another Unix box outside the Masq, on a public IP.

    Raju> I can transfer large files between B and C without problems.
    Raju> However, whenever I try to copy a large file from any Unix
    Raju> machine to A (using FTP, rcp, ssh, whatever), the connection
    Raju> freezes for long periods of time.  If I use a Winduhs
    Raju> machine instead of A, file transfers go through without any
    Raju> problems.  Anyone seen this freezing problem with a switch
    Raju> earlier?  I haven't checked with a hub, but for a number of
    Raju> reasons I feel that the problem will disappear with a hub.

    Raju> Regards,

    Raju> -- Raju

    Raju> --------------------------------------------------------------------
    Raju> The mailing list archives are available at
    Raju> http://lists.linux-india.org/cgi-bin/linux-delhi


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