Htb queueing problem

Edwin Whitelaw
Tue, 11 Apr 2006 14:24:16 -0000

A note to confirm that "-m physdev --physdev-is-bridged" in the
iptables
command does enable iptables to work in a bridged environment.  I was
fighting the same problem and this indeed solved it.

Below is my test script running on a two NIC Debian 3.1 266MHz bridge.
Before adding the physdev flag, only the "tc filter" commands worked
but
now the iptables commands also correctly classify the packets both with
the MARK and CLASSIFY approaches.  Note that the tc classes were setup
to give clear indication of which class was affecting the flow.

Edwin

---------test tc script----------
#!/bin/bash

RATE=8000

#if [ x$1 = ''xstop'' ]; then

if [ tc ]; then
        echo "Deleting qdisc for eth1"
        tc qdisc del dev eth1 root
fi


tc qdisc add dev eth1 root handle 1:0 htb default 90

tc class add dev eth1 parent 1:0 classid 1:1 htb rate ${RATE}kbit ceil
${RATE}kbit
tc class add dev eth1 parent 1:1 classid 1:10 htb rate 3000kbit ceil
3000kbit
tc class add dev eth1 parent 1:1 classid 1:20 htb rate 1500kbit ceil
1500kbit
tc class add dev eth1 parent 1:1 classid 1:30 htb rate 1000kbit ceil
1000kbit
tc class add dev eth1 parent 1:1 classid 1:50 htb rate 500kbit ceil 500kbit
tc class add dev eth1 parent 1:1 classid 1:90 htb rate 256kbit ceil 256kbit

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 1:50 handle 50: sfq perturb 10
tc qdisc add dev eth1 parent 1:90 handle 90: sfq perturb 10

#tc filter add dev eth1 parent 1:0 protocol ip u32 match ip sport 80
0xffff classid 1:10
#tc filter add dev eth1 parent 1:0 protocol ip u32 match ip sport 22
0xffff classid 1:20
#tc filter add dev eth1 parent 1:0 protocol ip u32 match ip sport 25
0xffff classid 1:50
#tc filter add dev eth1 parent 1:0 protocol ip u32 match ip sport 110
0xffff classid 1:50

iptables -F -t mangle
#out
#iptables -t mangle -A POSTROUTING -m physdev --physdev-is-bridged -p
tcp --sport 80 -j MARK --set-mark 2
#iptables -t mangle -A FORWARD -o eth1 -p tcp --sport 22 -j MARK
--set-mark 1
#iptables -t mangle -A FORWARD -o eth1 -p tcp --sport 25 -j MARK
--set-mark 1
#iptables -t mangle -A FORWARD -o eth1 -p tcp --sport 110 -j MARK
--set-mark 1
#
iptables -t mangle -A POSTROUTING -m physdev --physdev-is-bridged -p tcp
--sport 80 -j CLASSIFY --set-class 1:50
iptables -t mangle -A POSTROUTING -m physdev --physdev-is-bridged -p tcp
--sport 139 -j CLASSIFY --set-class 1:10
iptables -t mangle -A POSTROUTING -m physdev --physdev-is-bridged -p tcp
--sport 22 -j CLASSIFY --set-class 1:10
iptables -t mangle -A POSTROUTING -m physdev --physdev-is-bridged -p tcp
--sport 25 -j CLASSIFY --set-class 1:10
iptables -t mangle -A POSTROUTING -m physdev --physdev-is-bridged -p tcp
--sport 110 -j CLASSIFY --set-class 1:10

#tc filter add dev eth1 parent 1:0 protocol ip handle 1 fw classid 1:10
#tc filter add dev eth1 parent 1:0 protocol ip handle 2 fw classid 1:20
#tc filter add dev eth1 parent 1:0 protocol ip handle 3 fw classid 1:30
#tc filter add dev eth1 parent 1:0 protocol ip handle 5 fw classid 1:50
#tc filter add dev eth1 parent 1:0 protocol ip handle 9 fw classid 1:90

--
<=+=+=+==+=+=+==+=+=+=+=+=+=+=+=>
Edwin Whitelaw, P.E.
New River Valley Unwired, LLC
2200 Lonesome Dove Dr
Christiansburg, VA 24073
540-239-0318