LARTC - Jul 2005 - Bandwidth shaping script appears to incorrectly halve the bandwidth

Hi,

I''m trying to modify the Wondershaper script so achieve the following.

1. Prioritize traffic to the few IP addresses.
2. Everyone else should get a fair amount of bandwidth

The problem I am facing is when I run this script is that the bandwidth
seems to get halved. I tried to apply this script to a site where the
upstream and downstream were fully saturated. I immediately saw backlogs in
the ''everyone else'' class but it seems like they were getting
only 256 down
and 256 up. I thought perhaps the the class was combining the upstream and
downstream traffic but when I increased the INCOMING_BW and OUTGOING_BW to
1024, I didn''t see any increase. There still seemed to be only around
256kbps of traffic coming in and around 256kbps of traffic going out.

Any help on this would be much appreciated. 

#!/bin/bash 

# Set the incoming and outgoing bandwidth here.

INCOMING_BW=512
OUTGOING_BW=512

UL_DEV=eth0
DL_DEV=eth1


# clean existing down- and uplink qdiscs, hide errors
tc qdisc del dev $UL_DEV root    2> /dev/null > /dev/null
tc qdisc del dev $DL_DEV root	 2> /dev/null > /dev/null


# install root CBQ
echo Installing Root CBQ

tc qdisc add dev $UL_DEV root handle 1: cbq avpkt 1000 bandwidth 100mbit 
tc qdisc add dev $DL_DEV root handle 2: cbq avpkt 1000 bandwidth 100mbit

# shape everything on $UL_DEV at $OUTGOING_BW speed, $DL_DEV at $INCOMING_BW
echo Creating Classes

tc class add dev $UL_DEV parent 1: classid 1:1 cbq rate ${OUTGOING_BW}kbit
allot 1500 prio 5 bounded isolated 
tc class add dev $DL_DEV parent 2: classid 2:1 cbq rate ${INCOMING_BW}kbit
allot 1500 prio 5 bounded isolated


tc class add dev $UL_DEV parent 1:1 classid 1:10 cbq rate 128kbit allot 1600
prio 1 avpkt 1000
tc class add dev $DL_DEV parent 2:1 classid 2:10 cbq rate 128kbit allot 1600
prio 1 avpkt 1000

tc class add dev $UL_DEV parent 1:1 classid 1:20 cbq rate 128kbit allot 1600
prio 2 avpkt 1000 bounded
tc class add dev $DL_DEV parent 2:1 classid 2:20 cbq rate 128kbit allot 1600
prio 2 avpkt 1000 bounded

tc class add dev $UL_DEV parent 1:1 classid 1:30 cbq rate 128kbit allot 1600
prio 3 avpkt 1000 bounded
tc class add dev $DL_DEV parent 2:1 classid 2:30 cbq rate 128kbit allot 1600
prio 3 avpkt 1000 bounded

tc class add dev $UL_DEV parent 1:1 classid 1:40 cbq rate 128kbit allot 1600
prio 3 avpkt 1000 bounded
tc class add dev $DL_DEV parent 2:1 classid 2:40 cbq rate 128kbit allot 1600
prio 3 avpkt 1000 bounded

tc class add dev $UL_DEV parent 1:1 classid 1:50 cbq rate 128kbit allot 1600
prio 3 avpkt 1000 bounded
tc class add dev $DL_DEV parent 2:1 classid 2:50 cbq rate 128kbit allot 1600
prio 3 avpkt 1000 bounded

# Low priority class for P2P and other traffic that we don''t like

tc class add dev $UL_DEV parent 1:1 classid 1:60 cbq rate
$[1*$OUTGOING_BW/10]kbit allot 1600 prio 8 avpkt 1000
tc class add dev $DL_DEV parent 2:1 classid 2:60 cbq rate
$[1*$OUTGOING_BW/10]kbit allot 1600 prio 8 avpkt 1000


# Everyone else goes into this

tc class add dev $UL_DEV parent 1:1 classid 1:80 cbq rate
$[9*$OUTGOING_BW/10]kbit allot 1600 prio 5 avpkt 1000
tc class add dev $DL_DEV parent 2:1 classid 2:80 cbq rate
$[9*$INCOMING_BW/10]kbit allot 1600 prio 5 avpkt 1000

echo Classes Created

# all get Stochastic Fairness:

echo Adding SFQ to all classes
tc qdisc add dev $UL_DEV parent 1:10 handle 10: sfq perturb 10
tc qdisc add dev $DL_DEV parent 2:10 handle 10: sfq perturb 10
tc qdisc add dev $UL_DEV parent 1:20 handle 20: sfq perturb 10
tc qdisc add dev $DL_DEV parent 2:20 handle 20: sfq perturb 10
tc qdisc add dev $UL_DEV parent 1:30 handle 30: sfq perturb 10
tc qdisc add dev $DL_DEV parent 2:30 handle 30: sfq perturb 10
tc qdisc add dev $UL_DEV parent 1:40 handle 40: sfq perturb 10
tc qdisc add dev $DL_DEV parent 2:40 handle 40: sfq perturb 10
tc qdisc add dev $UL_DEV parent 1:50 handle 50: sfq perturb 10
tc qdisc add dev $DL_DEV parent 2:50 handle 50: sfq perturb 10
tc qdisc add dev $UL_DEV parent 1:60 handle 60: sfq perturb 10
tc qdisc add dev $DL_DEV parent 2:60 handle 60: sfq perturb 10
tc qdisc add dev $UL_DEV parent 1:80 handle 80: sfq perturb 10
tc qdisc add dev $DL_DEV parent 2:80 handle 80: sfq perturb 10


# start filters
tc filter add dev $UL_DEV parent 1: protocol ip prio 1 u32 match ip dst
192.168.1.1 flowid 1:10
tc filter add dev $UL_DEV parent 1: protocol ip prio 1 u32 match ip dst
192.168.1.2 flowid 1:10
tc filter add dev $UL_DEV parent 1: protocol ip prio 1 u32 match ip dst
192.168.1.3 flowid 1:10
tc filter add dev $UL_DEV parent 1: protocol ip prio 1 u32 match ip dst
192.168.1.4 flowid 1:10


# To speed up downloads while an upload is going on, put ACK packets in 1:10
as well

tc filter add dev $UL_DEV parent 1: protocol ip prio 8 u32 \
   match ip protocol 6 0xff \
   match u8 0x05 0x0f at 0 \
   match u16 0x0000 0xffc0 at 2 \
   match u8 0x10 0xff at 33 \
   flowid 1:10

# More filters lower priority

tc filter add dev $UL_DEV parent 1: protocol ip prio 1 u32 match ip dst
192.168.2.1 flowid 1:20
tc filter add dev $UL_DEV parent 1: protocol ip prio 1 u32 match ip dst
192.168.2.2 flowid 1:20
tc filter add dev $UL_DEV parent 1: protocol ip prio 1 u32 match ip dst
192.168.2.3 flowid 1:20
tc filter add dev $UL_DEV parent 1: protocol ip prio 1 u32 match ip dst
192.168.2.4 flowid 1:20
tc filter add dev $UL_DEV parent 1: protocol ip prio 1 u32 match ip dst
192.168.2.5 flowid 1:20
tc filter add dev $UL_DEV parent 1: protocol ip prio 1 u32 match ip dst
192.168.2.6 flowid 1:20



# rest is ''non-interactive'' ie ''bulk'' and
ends up in 1:80

tc filter add dev $UL_DEV parent 1: protocol ip prio 5 u32 match ip dst
0.0.0.0/0 flowid 1:80
tc filter add dev $DL_DEV parent 2: protocol ip prio 5 u32 match ip dst
0.0.0.0/0 flowid 2:80