AltQ + ng_iface
doconnor at gsoft.com.au
Fri Jul 29 09:59:53 GMT 2005
On Friday 29 July 2005 12:35, Julian Elischer wrote:
> I do this to great effect..
> two sites connected by links in which teh bottleneck is 200KB/sec (1 E1?)
> when a lot of data is flowing from 1 to 2 then data from 2 to 1 is also
> down because the acks have to go through the queues on ingress side of the
> bottleneck router.
> I add a dummynet entry on 1, limiting output to 190KB/sec, so that the
> queue is in dummynet and not the intermediate router, and then allow small
> ack packets
> to bypass that queue. As a result the data from 2 to 1 also flows at
> near capacity,
> and with a much lower latency. SInce data flows tend to be large packets,
> I sometimes actually prioitise ALL small packets allowing interactive
> stuff to
> bypass ftps etc. and sometimes I do it on both ends.
I am trying to do something similar, but for more interesting things like
ie prioritise game traffic at the expense of normal bulk traffic.
The problem is that you have to specify fixed pipe bandwidths so I need to run
a script which reduces the size of the "everything else" pipe down to a level
where it doesn't cause much delay.
It would be nice if there was a way of elevating the priority of the outbound
game traffic above the bulk transfers - allegedly my ISP prioritises game and
VoIP traffic on the way in to me...
My previous set up did work OK, but it was pretty limiting in that I had to
really aggressively reduce non-game traffic bandwidth otherwise the game
would get fairly laggy.
I am using 512/128k ADSL with PPPoE, and for non-crappy game play I need to
limit incoming non-game traffic to 64kbit/sec and outgoing to 24kbit/sec.
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
-- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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