Subject: RES: nt to nt tcpsat problems

From: Marcelo Reis <[email-masked]>
Date: Wed, 16 Feb 2000 16:09:58 -0300

It's true. But if you use the ftp client that comes with windows it will use
the default values configured.

Regards,

Marcelo M. Reis
[email-masked]

> ----- Mensagem original -----
> De:		Noam Gonen - Israel [SMTP:[email-masked]]
> Enviada em:		Quarta-feira, 16 de Fevereiro de 2000 12:04
> Para:		'Marcelo Reis'; [email-masked]'; [email-masked]
> Assunto:		RE: nt to nt tcpsat problems
> 
> 	Regarding DefaultReceiveWindow \ DefaultSendWindow  :
> 
> 	Note that applications can modify this value on a per-socket basis
> with the SO_RCVBUF socket option.
> 	so your changes might be "undone" on a per app. basis.
> 
> 	regards,
> 	Noam G. ([email-masked])
> 
> 
> 
> > -----Original Message-----
> > From:	Marcelo Reis [SMTP:[email-masked]]
> > Sent:	ו 11 פברואר 2000 14:23
> > To:	[email-masked]'; [email-masked]
> > Subject:	RES: nt to nt tcpsat problems
> > 
> > Hi Graham,
> > 
> > For winsock applications you need also to set two more variables:
> >
> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Afd\Parameters\Defaul
> > tR
> > eceiveWindow
> >
> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Afd\Parameters\Defaul
> > tS
> > endWindow 
> > 
> > Both of type REG_DWORD.
> > 
> > I don't know if it applies to you, but NT4 SP5 has a math error in its
> tcp
> > stack that causes the retransmit timer to be incorrectly computed,
> leading
> > to unnecessary retransmissions. There is a new tcpip.sys file that fixes
> > that bug. If you need this file and also the MS bug report regarding
> this,
> > please let me know.
> > 
> > Regards,
> > 
> > Marcelo M. Reis
> > [email-masked]
> > 
> > > ----- Mensagem original -----
> > > De:		Graham Street
> [SMTP:[email-masked]]
> > > Enviada em:		Quinta-feira, 10 de Fevereiro de 2000 11:04
> > > Para:		[email-masked]
> > > Assunto:		nt to nt tcpsat problems
> > > 
> > > Hi all,
> > > 
> > > We're trying to run windows file sharing protocols over a tcp sat link
> > > and getting miserable performance, even after setting TcpWindowSize to
> > > 65536.   We can get about 100-250k max.  We are trying to get at least
> > > one megabit out of it.  Is this even possible?  We can get 1-2
> megabits
> > > ftping from a sun box over satellite...
> > > 
> > > does anyone know of any clever (cheap) solutions  (spoofing nacks?,
> > > translating 
> > > to udp?)
> > > 
> > > Thanks,
> > > Graham Street
> > > [email-masked]