On Thu, 16 Sep 2004 16:43:40 -0400 Lionel Litty <llitty@xxxxxxxxx> wrote: > > promiscuous mode is tracked in the kernel with a counter, the kernel > > won't change the actual hardware until the counter goes to zero. This is > > why running something like tcpdump which changes interface to promiscuous mode > > will have no effect on the bridge. How did you > > force the interface out of non-promiscious mode? You may not changed anything. > > > > I simply did "ifconfig eth0 -promisc" and "ifconfig tap0 -promisc". > "ifconfig" then no longer indicates that the interfaces are in > promiscuous mode. Are you saying that the output of ifconfig is not > reliable and that the interfaces may in fact still be in promiscuous > mode? This would make sense, but then how come the performance seems > to be affected by the change? Because when the stack thinks it is in promiscious mode then all the packets have to be processed. > > Also promiscuous on tap means nothing really since there is no hardware > > filtering. > > OK. I thought there might have been some software simulation of the > promiscuous mode. > > Thanks, Lionel.
