Walter Haidinger wrote: > Hi! > > I'm trying to limit the uplink bandwidth using htb but no packets are > overlimit or dropped. :-( > > My router config: > * Linux kernel 2.4.20-pre10 (htb v3.7) with everything built as > modules in QoS, iptables in use. > * tc binary from htb3.6-020525.tgz > * external interface eth0: Internet access, 512 kbit/s uplink speed > * internal interface eth1: internal LAN, 100 Mbit/s > > The hosts in the internal lan should be bandwidth limited and are > masqueraded by the router. > > Q: Must the versions of the kernel module and the tc utility match? > > Below are my commands to create the qdiscs and classes: > > tc qdisc add dev eth1 root handle 1: htb default 20 > tc class add dev eth1 parent 1: classid 1:1 htb rate 64kbit ceil 64kbit burst 5k > tc class add dev eth1 parent 1:1 classid 1:10 htb rate 64kbit ceil 64kbit burst 5k > tc class add dev eth1 parent 1:1 classid 1:20 htb rate 57kbit ceil 64kbit burst 5k > tc class add dev eth1 parent 1:1 classid 1:30 htb rate 51kbit ceil 64kbit burst 5k > tc class add dev eth1 parent 1:1 classid 1:40 htb rate 6kbit burst 0 > tc qdisc add dev eth1 parent 1:10 handle 10: sfq perturb 10 > tc qdisc add dev eth1 parent 1:20 handle 20: sfq perturb 10 > tc qdisc add dev eth1 parent 1:30 handle 30: sfq perturb 10 > tc qdisc add dev eth1 parent 1:40 handle 40: sfq perturb 10 > > Notes: > * No errors from the tc utility > * All filters are scrapped for testing purposes, leaving only > unclassified packets which go the default class (this works) > * Bandwidths are really low for testing > * There are four classes with 100%, 90%, 80% and 10% bandwidth > > Next I tried an FTP upload from a machine on the internal LAN to the > internet, creating the following qdisc and class statistics: > > qdisc sfq 40: quantum 1514b perturb 10sec > Sent 0 bytes 0 pkts (dropped 0, overlimits 0) > > qdisc sfq 30: quantum 1514b perturb 10sec > Sent 0 bytes 0 pkts (dropped 0, overlimits 0) > > qdisc sfq 20: quantum 1514b perturb 10sec > Sent 13408020 bytes 12433 pkts (dropped 0, overlimits 0) > > qdisc sfq 10: quantum 1514b perturb 10sec > Sent 0 bytes 0 pkts (dropped 0, overlimits 0) > > qdisc htb 1: r2q 10 default 20 direct_packets_stat 0 > Sent 13408020 bytes 12433 pkts (dropped 0, overlimits 13422) > > class htb 1:1 root rate 64Kbit ceil 64Kbit burst 1023b cburst 1680b > Sent 13408020 bytes 12433 pkts (dropped 0, overlimits 0) > rate 35bps > lended: 1136 borrowed: 0 giants: 0 > tokens: 51202 ctokens: 116901 > > class htb 1:10 parent 1:1 leaf 10: prio 0 rate 64Kbit ceil 64Kbit burst > 1023b cburst 1680b > Sent 0 bytes 0 pkts (dropped 0, overlimits 0) > lended: 0 borrowed: 0 giants: 0 > tokens: 102400 ctokens: 168099 > > class htb 1:20 parent 1:1 leaf 20: prio 0 rate 57Kbit ceil 64Kbit burst > 1671b cburst 1680b > Sent 13408020 bytes 12433 pkts (dropped 0, overlimits 0) > rate 35bps > lended: 11297 borrowed: 1136 giants: 0 > tokens: 130246 ctokens: 116901 > > class htb 1:30 parent 1:1 leaf 30: prio 0 rate 51Kbit ceil 64Kbit burst > 1664b cburst 1680b > Sent 0 bytes 0 pkts (dropped 0, overlimits 0) > lended: 0 borrowed: 0 giants: 0 > tokens: 208941 ctokens: 168099 > > class htb 1:40 parent 1:1 leaf 40: prio 0 rate 6Kbit ceil 6Kbit burst > 1606b cburst 1606b > Sent 0 bytes 0 pkts (dropped 0, overlimits 0) > lended: 0 borrowed: 0 giants: 0 > tokens: 1714132 ctokens: 1714132 > > Well, everything goes to the default class 1:20 which is OK. > However, the traffic is *not* limited! No packets overlimit or dropped! > The FTP upload succeeded with full uplink speed (512 kbit/s). > > Q: What am I missing here? Why isn't the traffic limited by HTB? > > I've read the LARTC Howto, the required manpages, the docs at Martin > Devera's Homepage and had a look at the Wondershaper. Unfortunately I'm > still unable to find the bug. :-( Any hints would be appreciated! > > Thanks, Walter > > PS: I've also tried using filters u32 and fwmark but traffic was > never limited. I guess there is something wrong with my > class/qdisc setup in general, right? > > > > _______________________________________________ > LARTC mailing list / LARTC@mailman.ds9a.nl > http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/ > Walter, I'm giving a try on this one, I'm not familiar with HTB at all... I think that your only problem is: all classes can borrow bandwidth from other classes !! So there is no bandwidth control ! You should add the "bounded" modifier to classes that should be limited. Regards, Stephane. _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
