you can set the limit for the pipe, create two queues with different weights attached to the pipe, and then schedule.
ipfw pipe 12 config bw 3456 Kbit/s ipfw queue 34 config weight 2 pipe 12 ipfw queue 56 config weight 1 pipe 12 ipfw add queue 34 in recv halfduplexlink0 ipfw add queue 56 out xmit halfduplexlink0 that should do the job cheers luigi On Fri, Dec 12, 2014 at 6:10 PM, Brett Glass <br...@lariat.net> wrote: > Everyone: > > I have an interesting problem that I'm trying to solve with FreeBSD's IPFW > and DUMMYNET facilities. I have an application in which, due to arbitration > overhead, a half duplex data link has significantly higher costs -- > typically about twice as much -- in one direction than in the other. I'd > therefore like to set up a DUMMYNET pipe in FreeBSD that limits bandwidth > usage so that > > 2*(bandwidth in one direction) + (bandwidth in the other direction <= total > bandwidth limit > > It's easy to set IPFW up to sort the packets by direction, but it does not > seem possible to inject them into the same pipe in such a way that some > packets will count more toward the pipe's bandwidth limit than others. Any > ideas on how I can implement this? Willing to code if I must, but don't want > to reinvent the wheel. > > --Brett Glass > > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org" -- -----------------------------------------+------------------------------- Prof. Luigi RIZZO, ri...@iet.unipi.it . Dip. di Ing. dell'Informazione http://www.iet.unipi.it/~luigi/ . Universita` di Pisa TEL +39-050-2211611 . via Diotisalvi 2 Mobile +39-338-6809875 . 56122 PISA (Italy) -----------------------------------------+------------------------------- _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
