On 9/26/07, Tom Bombadil <grlists@gmail.com> wrote:
quoted text
>
> > net.inet.ip.ifq.maxlen defines how many packets can be queued in the IP
> > input queue before further packets are dropped. Packets comming from the
> > network card are first put into this queue and the actuall IP packet
> > processing is done later. Gigabit cards with interrupt mitigation may
> spit
> > out many packets per interrupt plus heavy use of pf can slowdown the
> > packet forwarding. So it is possible that a heavy burst of packets is
> > overflowing this queue. On the other hand you do not want to use a too
> big
> > number because this has negative effects on the system (livelock etc).
> > 256 seems to be a better default then the 50 but additional tweaking may
> > allow you to process a few packets more.
>
> Thanks Claudio...
>
> In the link that Stuart posted here, Henning mentions 256 times the
> number of interfaces:
> http://archive.openbsd.nu/?ml=openbsd-tech&a=2006-10&t=2474666


Is that per physical or per logical interface  ?

tony@rocket$ ifconfig -a | grep ^vlan | wc -l
    4094
tony@rocket$

/Tony