Re: congestion window size

[<suvashrestha --at-- wlink.com.np>]

hello.....


i read TCP tuning and did what was needed. i do not get the warning
anymore and i am able to get window sizes of 1M.

but when  i try to generate multiple streams (100 streams) through the
satellite emulator ; it is not able to do so and i get the message
"write2 failed: broken pipe". it is only able to make about 30-50
streams.

what is the reason for this???.

thanks

check (or, google "TCP tuning", "TCP autotuning"):

- http://www.psc.edu/networking/projects/tcptune/

cheers,
D


suvashrestha wrote:
> hello
>
> I am using iperf between 2 freeBSD boxes with a satellite emulator in
> between them to generate multiple streams. The default window size is
> 64K, while i need window sizes of around 1M.
>
> Without the satellite emulator (with window size of 64K) it works fine
> for 100 streams. But when I use the satellite emulator (delay: 500ms;
> window size: 1M or 64K) for 100 connections the pipe gets broken and i
> also get a warning saying the default is 64k.
>
> what should i do???? how do i make window size of 1M in freeBSD??
>
> Thank you in advance