Thanks. You are really a great help to me. Regards, Raghuvendra Kumar | BTSL 414 | Ext 011-41619770 | Desk +91-9818143739 | Mobile raghuvendra.kumar@xxxxxxxxxxxxxxxxxx | EMail -----Original Message----- From: lartc-bounces@xxxxxxxxxxxxxxx [mailto:lartc-bounces@xxxxxxxxxxxxxxx]On Behalf Of Michal Soltys Sent: Wednesday, September 19, 2007 2:57 AM To: 'lartc@xxxxxxxxxxxxxxx' Subject: Re: using tc to drop packets based on the diffserc or tos value > Hi Michal, > > Can i user filter on the default qdisc attached on the eth0.If then how? > (although i read somewhere that there is very little customization that > we can do the default qdisc)? Yes, default qdisc - pfifo_fast - is pretty limited, with 3 bands assigned to specific tos values' combinations. > If i used some classful qdisc than how would i restore my default > setting? Just delete the new qdisc you created, you will go back to pfifo_fast. > Do we have better way achieving the same? Well, HFSC or HTB would be a good choice, with SFQ or ESFQ attached to the leafs (if i.e. using classes per groups of users). > Can you suggest me some useful tutorials? In no particular order (and not necessarily related to your questions): 1) Information about extended tc actions (mirred, ipt, ...) : iproute2 tarball -> doc/actions remark: currently it seems, that if you use more than 1 ipt action in a filter rules, tc will segfault Also look for info in Russel's docs 2) Excellent Russel's set of docs http://ace-host.stuart.id.au/russell/files/tc/doc/ remark: contrary to other sources of info (i.e. lartc howto), the u32 docs here are superbly accurate and (almost) complete. minor missing info in u32: indev purpose (?) mark match (this one is simple, i.e. tc .... u32 match mark 1 flowid X:Y - - note that flowid/classid must be last here, or tc will complain). dscp can be used instead of tos 3) LARTC howto http://lartc.org/#download Pretty old, plenty of info, also plenty of missing info, and some (like u32) leaving a LOT of important details (almost plain wrong). 4) iproute+tc notes http://snafu.freedom.org/linux2.2/iproute-notes.html Also can be found in iproute tarball. Missing info remarks as in 3) 5) Traffic control howto http://tldp.org/HOWTO/Traffic-Control-HOWTO/index.html 6) Linux policy routing http://www.policyrouting.org/PolicyRoutingBook/ONLINE/TOC.html 7) ip command reference http://linux-ip.net/gl/ip-cref/ 8) some elementary classification info (BASIC) http://marc.info/?l=lartc&m=117569441229800&w=2 9) some discussion with plenty of good info related to HFSC http://marc.info/?t=107799591400001&r=1&w=2 10) other HFSC documentation info http://linux-ip.net/articles/hfsc.en/ http://www.cs.cmu.edu/~istoica/hfsc-tr.ps.gz (good, but detailed and long) http://www.sonycsl.co.jp/~kjc/software/TIPS.txt (note that *BSD's HFSC implementation, is a bit different (no concave curves, 80% limit on realtime, ...). Good simple overview, but be careful. 11) marc.info, google, ... _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
