Brian J. Murrell said: > I really don't seem to be getting this. ~sigh~
It'll come with time. > As I wrote before I'm not interested in dividing bandwidth up, just > prioritizing the use of the full bandwidth by all-comers. Yes. > So I figure I want a TBF in my root class to prevent the queue in my DSL > modem from filling up. I have about 128kb/s upstream so I added: > > # tc qdisc add dev ppp0 root handle 1: tbf rate 120kbit latency 50ms burst > 1540 Precisely what I have done, but I only specified rate and left the rest to the defaults. > (not sure what values I want for latency and burst) > > Then I figure I want a PRIO classifier with 3 bands. I want anything > not otherwise matching a filter to go in band 2, known bulk to go in > band 3 and priority, latency sensitive "interactive" stuff (i.e. ssh, > not scp) to go in band 1: That's pretty common and should work fine. > # tc qdisc add dev ppp0 parent 1: handle 10: prio > > And then only because some examples showed using it, I put an SFQ in > each band. Do I really need this? Should I not do this step? > > # tc qdisc add dev ppp0 parent 10:1 handle 100: sfq > # tc qdisc add dev ppp0 parent 10:2 handle 200: sfq > # tc qdisc add dev ppp0 parent 10:3 handle 300: sfq It depends. The default sfq had a large queue of 128 which may be too big for interactive traffic. That said, I ultimately chose to use sfq for all my classes. (p2p was unhappy especially with a straight pfifo with so many connections being made.) > Now I want to use iptables to put stuff into the different bands. > Again, by example I have been trying to do some iptables rules with -j > CLASSIFY --set-class (this one to get ping to be processed in the > highest priority band to test the effectiveness of "interactive > traffic): > > # iptables -t mangle -I POSTROUTING -p icmp --icmp-type echo-request -j > CLASSIFY --set-class 10:100 > > I'm not sure what the class numbers I should be using. Would they be > 10:100, 10:200 and 10:300 for the 3 bands? or 10:1, 10:2 and 10:3? 10:1 .. 10:3 should work. You could read my whole traffic control guide as it covers all these basics and it might help some since my goal was a configuration similar to yours. http://edseek.com/~jasonb/articles/traffic_shaping/ _______________________________________________ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
