hi, i use the tc tool to shape traffic. in my testbed i have 3 pc´s. 2 of them act as server and client for the iperf traffic generator programm. the 3. pc is my traffic router. i used in my tests the tbf, cbq and htb qdisc. i wanted to shape traffic form 50 Mbit/s to 5 Mbit/s. i used a small packet size in my tests (64byte). the result was horrible. None of this qidsc couldn´t shape may traffic to its allocate rate. Does anybody know a solution for this problem? Thanx in advance. Thorsten
On Friday 24 May 2002 09:13, Rendel, Thorsten wrote:> hi, > i use the tc tool to shape traffic. in my testbed i have 3 pc´s. 2 of them > act as server and client for the iperf traffic generator programm. the 3. > pc is my traffic router. i used in my tests the tbf, cbq and htb qdisc. i > wanted to shape traffic form 50 Mbit/s to 5 Mbit/s. i used a small packet > size in my tests (64byte). the result was horrible. None of this qidsc > couldn´t shape may traffic to its allocate rate. Does anybody know a > solution for this problem?I have the same setup, but I use ttcp als traffic generator with default packet size. Cbq/htb/tbf works with no problem. You can find the results and scripts on www.docum.org Stef -- stef.coene@docum.org "Using Linux as bandwidth manager" http://www.docum.org/ #lartc @ irc.openprojects.net
Dear Stef, Can you take a look of my script: 1. I would like to create root 1 with classid 1:1 and 1:2 and default 1:2. 2. 1:10 is under 1:1 with htb ceil 1Mbit for EF traffic. 3. 1:2 is directly under 1:0 and 1:20 is under 1:2 for default. 4. I would like to complete seperate 1:1 and 1:2, so that they can''t borrow to each other. The structure is: 1.0 / \ 1.1 1.2 / \ 1.10 1.20 (EF) (BE) Since 1.10 and 1.20 have different parent, they can''t borrow to each other. Do you think I can differentiate the class in this way? ################################################################### echo Clean all the tc setup ./tc qdisc del dev eth1 root # edge router #echo Coloring the packet at Samwise (not working yet to testing based on address) iptables -A PREROUTING -t mangle -s 192.168.35.2 -j FTOS --set-ftos 0Xb8 # Create qdisc (set default to 1:3) ./tc qdisc add dev eth1 root handle 1: htb default 2 ./tc class add dev eth1 parent 1: classid 1:1 htb rate 1.5Mbit burst 50k # echo classid 1:1 is for EF ./tc class add dev eth1 parent 1:1 classid 1:10 htb rate 1Mbit ceil 1Mbit burst 50k prio 1 # echo classid 1:2 is for BE ./tc class add dev eth1 parent 1:2 classid 1:20 htb rate 0.5Mbit ceil0.5Mbit burst 30k prio 2 ./tc qdisc add dev eth1 parent 1:20 red limit 500KB min 150KB max 450KB burst 200 avpkt 1000 bandwidth 0.5Mbit probability 0.4 # echo Filter ./tc filter add dev eth1 parent 1: protocol ip prio 1 u32 match ip tos 0xb8 0xff classid 1:10 ./tc filter add dev eth1 parent 1: protocol ip prio 2 u32 match ip tos 0x0 0xff classid 1:20 ###################################################################### ./tc qdisc show qdisc red 8001: dev eth1 limit 500Kb min 150Kb max 450Kb qdisc htb 1: dev eth1 r2q 10 default 2 direct_packets_stat 0 ./tc -s -d class show dev eth1 class htb 1:1 root rate 1536Kbit ceil 1536Kbit burst 50Kb/8 mpu 0b cburst 3565b/8 mpu 0b level 7 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) lended: 0 borrowed: 0 giants: 0 tokens: 213332 ctokens: 14857 class htb 1:10 parent 1:1 prio 1 quantum 13107 rate 1Mbit ceil 1Mbit burst 50Kb/8 mpu 0b cburst 2909b/8 mpu 0b level 0 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) lended: 0 borrowed: 0 giants: 0 tokens: 320000 ctokens: 18187 class htb 1:20 root leaf 8001: prio 2 quantum 6553 rate 512Kbit ceil 512Kbit burst 30Kb/8 mpu 0b cburst 2254b/8 mpu 0b level 0 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) lended: 0 borrowed: 0 giants: 0 tokens: 384000 ctokens: 28187 ####################################################################### Traffic Generator By the way, in your web page, I don''t think using Iperf to generate traffic is good idea since Iperf seems to output all the UDP stream at once. It is good for find the BW, but not for load the network. In my case, before TC, I use MGEN with using different packet sizes to load thenetwork. I found that the key issues to load the network is the ratio data packet size/traffic packet size if the ratio is equal to 1, it is very difficult to load the packet whatever the rate is. If the ratio is greater than 1 (e.g 3.5), it is quite easy to load the network. Does any one know how to load the network easily, whtat tools are you using? Patrick
Hi, you are right. If you create multi-root tree the subtrees are independent and can''t borrow. Also you don''t need to create 1.1, you can use 1.10 as root (if you don''t want to have other classes under 1.1 of course). devik On Sat, 25 May 2002, King Yung Tong wrote:> Dear Stef, > > Can you take a look of my script: > 1. I would like to create root 1 with classid 1:1 and 1:2 and default 1:2. > 2. 1:10 is under 1:1 with htb ceil 1Mbit for EF traffic. > 3. 1:2 is directly under 1:0 and 1:20 is under 1:2 for default. > 4. I would like to complete seperate 1:1 and 1:2, so that they can''t > borrow to each other. > > The structure is: > > 1.0 > / \ > 1.1 1.2 > / \ > 1.10 1.20 > (EF) (BE) > > Since 1.10 and 1.20 have different parent, they can''t borrow to each > other. Do you think I can differentiate the class in this way? > > ################################################################### > > echo Clean all the tc setup > ./tc qdisc del dev eth1 root > > # edge router > #echo Coloring the packet at Samwise (not working yet to testing based on address) > iptables -A PREROUTING -t mangle -s 192.168.35.2 -j FTOS --set-ftos 0Xb8 > > # Create qdisc (set default to 1:3) > ./tc qdisc add dev eth1 root handle 1: htb default 2 > > ./tc class add dev eth1 parent 1: classid 1:1 htb rate 1.5Mbit burst 50k > > # echo classid 1:1 is for EF > ./tc class add dev eth1 parent 1:1 classid 1:10 htb rate 1Mbit ceil 1Mbit > burst 50k prio 1 > > # echo classid 1:2 is for BE > ./tc class add dev eth1 parent 1:2 classid 1:20 htb rate 0.5Mbit ceil0.5Mbit burst 30k prio 2 > ./tc qdisc add dev eth1 parent 1:20 red limit 500KB min 150KB max 450KB > burst 200 avpkt 1000 bandwidth 0.5Mbit probability 0.4 > > # echo Filter > ./tc filter add dev eth1 parent 1: protocol ip prio 1 u32 match ip tos > 0xb8 0xff classid 1:10 > ./tc filter add dev eth1 parent 1: protocol ip prio 2 u32 match ip tos 0x0 > 0xff classid 1:20 > > ###################################################################### > ./tc qdisc show > qdisc red 8001: dev eth1 limit 500Kb min 150Kb max 450Kb > qdisc htb 1: dev eth1 r2q 10 default 2 direct_packets_stat 0 > > ./tc -s -d class show dev eth1 > class htb 1:1 root rate 1536Kbit ceil 1536Kbit burst 50Kb/8 mpu 0b cburst > 3565b/8 mpu 0b level 7 > Sent 0 bytes 0 pkts (dropped 0, overlimits 0) > lended: 0 borrowed: 0 giants: 0 > tokens: 213332 ctokens: 14857 > > class htb 1:10 parent 1:1 prio 1 quantum 13107 rate 1Mbit ceil 1Mbit burst > 50Kb/8 mpu 0b cburst 2909b/8 mpu 0b level 0 > Sent 0 bytes 0 pkts (dropped 0, overlimits 0) > lended: 0 borrowed: 0 giants: 0 > tokens: 320000 ctokens: 18187 > > class htb 1:20 root leaf 8001: prio 2 quantum 6553 rate 512Kbit ceil > 512Kbit burst 30Kb/8 mpu 0b cburst 2254b/8 mpu 0b level 0 > Sent 0 bytes 0 pkts (dropped 0, overlimits 0) > lended: 0 borrowed: 0 giants: 0 > tokens: 384000 ctokens: 28187 > > ####################################################################### > > Traffic Generator > > By the way, in your web page, I don''t think using Iperf to generate > traffic is good idea since Iperf seems to output all the UDP stream at > once. It is good for find the BW, but not for load the network. In my > case, before TC, I use MGEN with using different packet sizes to load > thenetwork. I found that the key issues to load the network is the ratio > > data packet size/traffic packet size > > if the ratio is equal to 1, it is very difficult to load the packet > whatever the rate is. If the ratio is greater than 1 (e.g 3.5), it is > quite easy to load the network. > > Does any one know how to load the network easily, whtat tools are you > using? > > > Patrick > > _______________________________________________ > LARTC mailing list / LARTC@mailman.ds9a.nl > http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/ > >
Dear devik,
Thank you, you are right, in my case,
My structure should look like that :
1.0 (1.5M)
/ \
(0.5M)1.1 1.2 (1M)
/ / \
1.10 1.15 1.20
(EF) (AF) (BE)
If I add the following:
1) Give AF drop priority,
2) Allow AF (1.15) and BE (1.20) sharing 1M (both under 1.2 sharing
between 1.2),
3) EF (1.10) is strickly allocate certain BW (0.5M) from 1.1 since it is
different parent form 1.2).
Do you think the above stucuture is similar to the differential service
in RFC?
Patrick
On Sat, 25 May 2002, Martin Devera wrote:
> Hi,
> you are right. If you create multi-root tree the subtrees
> are independent and can''t borrow. Also you don''t need to
> create 1.1, you can use 1.10 as root (if you don''t want to
> have other classes under 1.1 of course).
> devik
>
> On Sat, 25 May 2002, King Yung Tong wrote:
>
> > Dear Stef,
> >
> > Can you take a look of my script:
> > 1. I would like to create root 1 with classid 1:1 and 1:2 and default
1:2.
> > 2. 1:10 is under 1:1 with htb ceil 1Mbit for EF traffic.
> > 3. 1:2 is directly under 1:0 and 1:20 is under 1:2 for default.
> > 4. I would like to complete seperate 1:1 and 1:2, so that they
can''t
> > borrow to each other.
> >
> >
> > Since 1.10 and 1.20 have different parent, they can''t borrow
to each
> > other. Do you think I can differentiate the class in this way?
> >