Hello mailing = list,

i stand bevor a mystery and = cannot explain it J. I want to do shaping and prioritization and I have done = these following configurations and simulations. I can=B4t explain, that the = combination of PRIO and TBF is much better than the HTB (with the prio = parameter) alone or in combination with the SFQ.

Here are my example = configurations: 2 Traffic Classes http (80 =3D 0x50) and ssh (22 =3D 0x16), and in my = example, I want to prioritize the http-Traffic:

HTB: the results of the = simulation ist here:

HTB cumulative: http://simo.mix4web.de/u= p/htb_cumul.jpg

HTB delay: http://simo.mix4web.de/u= p/htb_delay.jpg

HTB with prio parameter = cumulative: http://sim= o.mix4web.de/up/htb_cumul_prio_paramter.jpg

HTB with prio parameter delay: = http://si= mo.mix4web.de/up/htb_delay_prio_parameter.jpg

#define UPLOAD = 1000kbps

dev eth0 1000 = {

egress = {

class ( <$high> ) if tcp_dport =3D=3D = 80;

class(<$low>) if tcp_dport =3D=3D 22;

htb () {

= class ( rate UPLOAD, ceil UPLOAD) = {

/* = with the prio parameter : $high =3D class ( rate 700kbps, ceil UPLOAD, = prio 0); */

= $high =3D class ( rate 700kbps, ceil = UPLOAD);

/* = with the prio parameter : $low =3D class ( rate 300kbps, ceil UPLOAD, = prio 0); */

= $low =3D class ( rate 300kbps, ceil UPLOAD, prio = 1);

= }

}

= }

}

/* 1Mbit 0.0008 =3D = 100*8/10^6 */

every 0.0008s send = TCP_PCK($tcp_dport=3D22) 0 x 60

/* 800kbit/s = */

every 0.001s send = TCP_PCK($tcp_dport=3D80) 0 x 60

time 2s

PRIO and = TBF:

PRIO and TBF cumulative: http://simo.mix4web= .de/up/prio_tbf_cumul.jpg

PRIO and TBF delay: http://simo.mix4web.de/up/prio_tbf_delay.jpg

#define UPLOAD = 1000kbps

dev eth0 1000 = {

egress = {

class ( <$high> ) if tcp_dport =3D=3D = 80;

class(<$low>) if tcp_dport =3D=3D 22;

prio{

= $high =3D class{ tbf (rate 700kbps, burst 1510B, mtu 1510B, limit = 3000B); }

= $low =3D class{ tbf (rate 300kbps, burst 1510B, mtu 1510B, limit 3000B); = }

= }

}

/* 1Mbit 0.0008 =3D = 100*8/10^6 */

every 0.0008s send = TCP_PCK($tcp_dport=3D22) 0 x 60

/* 800kbit/s = */

every 0.001s send = TCP_PCK($tcp_dport=3D80) 0 x 60

time 2s

the delay by the combination of = PRIO and TBF is much better than by the HTB. (is it possible that pakets maybe = dropped by the combination of PRIO and TBF, that=B4s why the latency is so = good???)

Have you an = idea???

thanks

simo

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