Satellite latency

Tue Mar 5 06:42:22 UTC 2002

New 12.2(8)T feature in Cisco IOS called TCP Windows Scaling:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t8/tcpwslfn.htm

Specifically made for satellite networks:
ip tcp window-size 750000

-Hank

>On Wed, Feb 27, 2002 at 11:01:04PM -0500, Mark Allman wrote:
> > > The receiver is the one that informs the sender how large of a
> > > window it can accept, so it can be practical for a subscriber
> > > installation. It wouldn't be a good idea to park a bunch of
> > > servers behind one of these links, but any receiving node that set
> > > its TCP receive window to 2x the byte/sec capacity of the link
> > > should see decent throughput.
> >
> > No, you need to set things on both sides.  The sender has to buffer
> > data until it is ACKed in case it needs to retransmit.  So, its
> > buffer needs to be as big as the advertised window or the sender
> > buffer will effectivly limit the advertised window.
>
>What do you need to set on the send side? If the receiver tells the
>sender "my acceptable window is 512k", the sender knows how much it
>has to buffer.
>
>-c