Dear all can anyone tell me how to mark packet''s DSCP value using tc? Thanks. Regards, philip -- Hong Kong IP Multicast Initiative (HKIPMI) Department of Information Engineering The Chinese University of Hong Kong Phone : 2603 5240 Fax : 2603 5032 _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
On Thu, Mar 13, 2003 at 03:56:48PM +0800, Philip Ho wrote: PH>Dear all PH>can anyone tell me how to mark packet''s DSCP value using tc? You must use iptable not tc iptable -t mangle -A <chain> <conditions> -s DSCP --set-dscp <num> -- Best regard, Aleksander Trotsai aka MAGE-RIPE aka MAGE-UANIC My PGP key at ftp://blackhole.adamant.ua/pgp/trotsai.key[.asc] Big trouble - user to computer ration too low. _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
> >can anyone tell me how to mark packet''s DSCP value using tc? >Hi, You can use the dsmark qdisc. Something like (example): tc qdisc add dev $DEV handle 1:0 root dsmark indices 64 set_tc_index (...) tc class change $DEV parent 1:0 classid 1:1 dsmark 0x3 value 0xb8 # EF (...) tc filter add dev $DEV parent 1:0 prio 4 u32 ip dst y.y.y.y classid 1:1 This way, packets going to y.y.y.y get EF mark. Iproute2 packages comes with some examples. The "Differentiated Services on Linux" draft by Almesberger, Jamal and Alexey Kuznetsov is another good source, including commented and easy to understand examples. Regards, Joana Urbano --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.459 / Virus Database: 258 - Release Date: 25-02-2003
Dear Joana I guess dsmark qdisc is runned before iptables PREROUTING phase, right? Regards, philip Maria Joana Urbano wrote:> > > >can anyone tell me how to mark packet''s DSCP value using tc? > > > > Hi, > > You can use the dsmark qdisc. Something like (example): > > tc qdisc add dev $DEV handle 1:0 root dsmark indices 64 set_tc_index > (...) > tc class change $DEV parent 1:0 classid 1:1 dsmark 0x3 value 0xb8 # EF > (...) > tc filter add dev $DEV parent 1:0 prio 4 u32 ip dst y.y.y.y classid 1:1 > > This way, packets going to y.y.y.y get EF mark. > > Iproute2 packages comes with some examples. The "Differentiated Services on > Linux" draft by Almesberger, Jamal and Alexey Kuznetsov is another good > source, including commented and easy to understand examples. > > Regards, > Joana Urbano > > ------------------------------------------------------------------------ > > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.459 / Virus Database: 258 - Release Date: 25-02-2003_______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
Hi Philip,>I guess dsmark qdisc is runned before iptables PREROUTING phase, right? >Hummm, I actually use dsmark after all iptables hooks, at the QoS Egress, just before the packet leaves the interface (please see KPTD at www.docum.org). Probably you can do it before the routing code, using the IMQ, but I haven''t try it and I am not sure if this is possible... Regards, Joana Urbano> > > > > >can anyone tell me how to mark packet''s DSCP value using tc? > > > > > > > Hi, > > > > You can use the dsmark qdisc. Something like (example): > > > > tc qdisc add dev $DEV handle 1:0 root dsmark indices 64 set_tc_index > > (...) > > tc class change $DEV parent 1:0 classid 1:1 dsmark 0x3 value 0xb8 # EF > > (...) > > tc filter add dev $DEV parent 1:0 prio 4 u32 ip dst y.y.y.y classid 1:1 > > > > This way, packets going to y.y.y.y get EF mark. > > > > Iproute2 packages comes with some examples. The "Differentiated Services on > > Linux" draft by Almesberger, Jamal and Alexey Kuznetsov is another good > > source, including commented and easy to understand examples. > > > > Regards, > > Joana Urbano > >