Lee wrote: > I just noticed that I can't get a 1MB tcp window on debian 11 > > $ iperf --version > iperf version 2.1.4 (18 August 2021) pthreads > > $ iperf -s -w 1M --time 60 -i 10 > ------------------------------------------------------------ > Server listening on TCP port 5001 > TCP window size: 416 KByte (WARNING: requested 1.00 MByte) > > > The exact same software (.. or at least the same source code) on a > windows 10/cygwin machine says I get the full 1MB tcp window size: > TCP window size: 1.00 MByte > > So is there something on the Debian machine limiting the tcp window & > if so, how do I change it.
https://netbeez.net/blog/how-to-adjust-the-tcp-window-size-limit-on-linux/ Details are not Debian-specific; sysctl config can be placed in /etc/sysctl.conf or in the /etc/sysctl.d/ directory. -dsr-
