VOIP etc > Voice Over IP - VOIP > VOIP Tech Chat > Is DD-WRT's QoS very functional?

You can also run your own custom QOS under Administration .. Commands .. Firewall

I run a modified 'wondershaper' configuration, that prioritizes UDP traffic (voip/gaming). I only prioritize my uplink traffic, my download traffic is permitted at full speed.

I also use this area for any custom sysctl entries. If you torrent, I recommend you use a fixed port, and add it to NOPRIOPORTSRC.

echo 0 > /proc/sys/net/ipv4/tcp_westwood
echo 1 > /proc/sys/net/ipv4/tcp_vegas_cong_avoid
echo 1 > /proc/sys/net/ipv4/tcp_vegas_gamma
# default rmem: 4096 43689 87638
# default wmem: 4096 16384 65536
echo "4096 32768 65536" > /proc/sys/net/ipv4/tcp_rmem 
echo "4096 32768 65536" > /proc/sys/net/ipv4/tcp_wmem
#
tc qdisc add dev br0 root sfq perturb 10
tc qdisc add dev eth0 root sfq perturb 10
tc qdisc add dev eth1 root sfq perturb 10
#
D1=0
U1=2500
U2=$(($U1-32))
U3=$(($U2-32))
DEV=vlan1
NOPRIOHOSTSRC=""
NOPRIOPORTSRC="20 21 119 563 6881 8081"
NOPRIOHOSTDST=$NOPRIOHOSTSRC
NOPRIOPORTDST=$NOPRIOPORTSRC
HIGHPRIOPORTSRC="2427 4569 5004 5060 5061 5080"
HIGHPRIOPORTDST=$HIGHPRIOPORTSRC
#
# 2427 mgcp, 4569 iax, 5004 rtp, 5060 sip, 5061 sip-tls
# clean existing down- and uplink qdiscs
tc qdisc del dev $DEV root
tc qdisc del dev $DEV ingress
#
tc qdisc add dev $DEV root handle 1: htb default 20
tc class add dev $DEV parent 1: classid 1:1 htb rate $U1 kbit 
tc class add dev $DEV parent 1:1 classid 1:10 htb rate $(((90*$U1)/100))kbit \
   ceil ${U1}kbit   prio 1
tc class add dev $DEV parent 1:1 classid 1:20 htb rate $(((85*$U1)/100))kbit \
   ceil ${U2}kbit   prio 2
tc class add dev $DEV parent 1:1 classid 1:30 htb rate $(((80*$U1)/100))kbit \
   ceil ${U3}kbit   prio 3
tc qdisc add dev $DEV parent 1:10 handle 10: sfq perturb 10
tc qdisc add dev $DEV parent 1:20 handle 20: sfq perturb 10
tc qdisc add dev $DEV parent 1:30 handle 30: sfq perturb 10
tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \
      match ip tos 0x10 0xff  flowid 1:10
tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \
        match ip protocol 1 0xff flowid 1:10
tc filter add dev $DEV parent 1: protocol ip prio 10 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
tc filter add dev $DEV parent 1: protocol ip prio 10 u32 \
   match ip protocol 17 0xff \
   flowid 1:10
 
# voip
for a in $HIGHPRIOPORTDST
do
tc filter add dev $DEV parent 1: protocol ip prio 10 u32 \
        match ip dport $a 0xffff flowid 1:10
done
 
for a in $HIGHPRIOPORTSRC
do
tc filter add dev $DEV parent 1: protocol ip prio 15 u32 \
        match ip sport $a 0xffff flowid 1:10
done
 
# bulk
for a in $NOPRIOPORTDST
do
        tc filter add dev $DEV parent 1: protocol ip prio 14 u32 \
           match ip dport $a 0xffff flowid 1:30
done
 
for a in $NOPRIOPORTSRC
do
        tc filter add dev $DEV parent 1: protocol ip prio 15 u32 \
           match ip sport $a 0xffff flowid 1:30
done
for a in $NOPRIOHOSTSRC
do
        tc filter add dev $DEV parent 1: protocol ip prio 16 u32 \
           match ip src $a flowid 1:30
done
for a in $NOPRIOHOSTDST
do
        tc filter add dev $DEV parent 1: protocol ip prio 17 u32 \
           match ip dst $a flowid 1:30
done
 
# default
tc filter add dev $DEV parent 1: protocol ip prio 18 u32 \
   match ip dst 0.0.0.0/0 flowid 1:20
 
tc qdisc add dev $DEV handle ffff: ingress
 
tc filter add dev $DEV parent ffff: protocol ip prio 50 u32 match ip src \
   0.0.0.0/0 police rate ${D1}kbit drop flowid :1
 

And then you can see the stats as well:

$ tc -s qdisc ls dev vlan1
$ tc -s class ls dev vlan1

root@DD-WRT:/#  tc -s qdisc ls dev vlan1
 
qdisc htb 1: r2q 10 default 20 direct_packets_stat 0
 Sent 3953945242 bytes 5842851 pkts (dropped 125, overlimits 633866)
qdisc sfq 10: parent 1:10 limit 128p quantum 1518b perturb 10sec
 Sent 2077130047 bytes 3813386 pkts (dropped 0, overlimits 0)
qdisc sfq 20: parent 1:20 limit 128p quantum 1518b perturb 10sec
 Sent 585068683 bytes 801888 pkts (dropped 125, overlimits 0)
qdisc sfq 30: parent 1:30 limit 128p quantum 1518b perturb 10sec
 Sent 1291746512 bytes 1227577 pkts (dropped 0, overlimits 0)
qdisc ingress ffff: ----------------
 Sent 5302390167 bytes 6196822 pkts (dropped 0, overlimits 0)
 
root@DD-WRT:/#   tc -s class ls dev vlan1
 
class htb 1:10 root leaf 10: prio 1 rate 2250Kbit ceil 2500Kbit burst 4411b cburst 4724b
 Sent 2077130047 bytes 3813386 pkts (dropped 0, overlimits 0)
 rate 1232bit 1pps
 lended: 3813386 borrowed: 0 giants: 0
 tokens: 12665 ctokens: 12219
 
class htb 1:20 root leaf 20: prio 2 rate 2125Kbit ceil 2468Kbit burst 4255b cburst 4684b
 Sent 585068683 bytes 801888 pkts (dropped 125, overlimits 0)
 rate 1744bit 1pps
 lended: 801888 borrowed: 0 giants: 0
 tokens: 12830 ctokens: 12186
 
class htb 1:30 root leaf 30: prio 3 rate 2000Kbit ceil 2436Kbit burst 4Kb cburst 4644b
 Sent 1291746512 bytes 1227577 pkts (dropped 0, overlimits 0)
 rate 8bit
 lended: 1227577 borrowed: 0 giants: 0
 tokens: 13225 ctokens: 12324
 

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