Hello Leslie,
I had the same problem for kernel 2.4.27 and it was related to bug in HTB.
Use kernel >=2.6.8.1 or apply patch from Devik's site
http://luxik.cdi.cz/~devik/qos/htb/v3/htbfair.diff.
Best regards,
Zviad
>Hello,
>
>I have a serious problem with HTB which I wasn't able to solve myself.
>
>I run a masquerading router with ppp0 as interface to the Internet.
>Three clients need to share a downstream of 1 MBit, which I want
>to divide with tc.
>When I see a packet being forwarded to one of these clients, I give
>it the appropriate unique mark:
>
>iptables -t mangle -A FORWARD -d 192.168.34.141 -j MARK --set-mark 1
>iptables -t mangle -A FORWARD -d 192.168.34.140 -j MARK --set-mark 2
>iptables -t mangle -A FORWARD -d 192.168.1.2 -j MARK --set-mark 3
>
>Because it might be of interest: 192.168.34.0/24 is on network A
>with 10 MBit, 192.168.1.0/24 is on network B with 100 MBit.
>
>I then attach an IMQ device imq0 to the FORWARD table:
>
># delegate all incoming on ppp+ to imq0
>iptables -t mangle -A FORWARD -i ppp+ -j IMQ --todev 0
>
>After all this I create the actual tc setup:
>
># --- snip ---
># clear root qdisc
> tc qdisc del dev imq0 root
>
># add root qdisc (htb)
> tc qdisc add dev imq0 root handle 1: htb default 40
>
># add root class (needed for bandwidth borrowing)
> tc class add dev imq0 parent 1: classid 1:1 htb rate 1mbit ceil 1mbit
>
># set classes for users
> tc class add dev imq0 parent 1:1 classid 1:10 htb rate 333kbit ceil 1mbit \
> burst 15k
> tc class add dev imq0 parent 1:1 classid 1:20 htb rate 333kbit ceil 1mbit \
> burst 15k
> tc class add dev imq0 parent 1:1 classid 1:30 htb rate 333kbit ceil 1mbit \
> burst 15k
> tc class add dev imq0 parent 1:1 classid 1:40 htb rate 5kbps
>
># set filters to direct ips to their classes
> tc filter add dev imq0 protocol ip parent 1: prio 1 handle 1 fw flowid 1:10
> tc filter add dev imq0 protocol ip parent 1: prio 1 handle 2 fw flowid 1:20
> tc filter add dev imq0 protocol ip parent 1: prio 1 handle 3 fw flowid 1:30
>
># --- snap ---
>
>1:40 is just for testing.
>
>The 'rate'-argument gets applied correctly if I don't use ceil - but I
>do, of
>course, want to let the classes borrow free bandwidth, so I use a ceiling
>of 1 MBit. And herein lies the problem:
>
>If 1:10 and 1:30 both download a file with full speed, 1:10 gets about
>20kb/s (which is under its guaranteed bandwidth!) and 1:30 gets
>90 kb/s. What is going wrong here? The shortened output of tc:
>
>class htb 1:1 root rate 1Mbit ceil 1Mbit burst 2909b/8 mpu 0b cburst
>2909b/8 mpu 0b level 7
>class htb 1:10 parent 1:1 prio 0 quantum 4262 rate 333Kbit ceil 1Mbit
>burst 15Kb/8 mpu 0b cburst
>class htb 1:20 parent 1:1 prio 0 quantum 4262 rate 333Kbit ceil 1Mbit
>burst 15Kb/8 mpu 0b cburst
>class htb 1:30 parent 1:1 prio 0 quantum 4262 rate 333Kbit ceil 1Mbit
>burst 15Kb/8 mpu 0b cburst
>class htb 1:40 parent 1:1 prio 0 quantum 1000 rate 40Kbit ceil 40Kbit
>burst 1650b/8 mpu 0b cburst
>
>...shows that each class is configured equal.
>
>Any clues? I'd be very, very grateful if anyone could point out errors.
>If more output is needed, just tell me.
>
>
>Kind regards,
>
>Leslie
>
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