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 protected])
> -----Original Message-----
> From: Marcelo Reis [SMTP:[email protected]]
> Sent: � 11 ������ 2000 14:23
> To: '[email protected]'; [email protected]
> 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 protected]
>
> > ----- Mensagem original -----
> > De: Graham Street [SMTP:[email protected]]
> > Enviada em: Quinta-feira, 10 de Fevereiro de 2000 11:04
> > Para: [email protected]
> > 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 protected]
This archive was generated by hypermail 2b29 : Wed Feb 16 2000 - 10:54:35 EST