fq_codel script for Asus AC1200.txt

#Ready script can be uploaded to scripts -> 'Run After Router Started'. Make sure to Apply changes. Then commit changes.
#This script assumes your RT-1200AC WAN interface is called eth2
#You can find out by typing 'tc qdisc show' though SSH

#!/bin/sh

#hw-nat module disabled  qos modules enabled
/sbin/rmmod hw_nat
/sbin/modprobe ifb numifbs=1
/sbin/modprobe sch_ingress
/sbin/modprobe sch_htb
/sbin/modprobe sch_fq_codel
/sbin/modprobe act_mirred
/sbin/modprobe cls_u32
/bin/ip link set ifb0 name ifb_ppp0

#
WAN_INTF=eth2

# Set Up / Down speeds to 90% of your max...
# Example: 45mbps down / 4 mbps up
WAN_UP_SPEED=4000000
WAN_DOWN_SPEED=45000000

# advanced settings
TQDISC=fq_codel

FQ_CODEL_QUANTUM_UP=300
FQ_CODEL_QUANTUM_DOWN=300

FQ_CODEL_TARGET_UP=5ms
FQ_CODEL_TARGET_DOWN=5ms

HTB_QUANTUM_UP=1500
HTB_QUANTUM_DOWN=1500

#TQDISC_OPTS_UP=
#TQDISC_OPTS_DOWN=
if [ "$TQDISC" == fq_codel ]; then
    TQDISC_OPTS_UP="quantum $FQ_CODEL_QUANTUM_UP "
    TQDISC_OPTS_UP="target $FQ_CODEL_TARGET_UP "
    TQDISC_OPTS_DOWN="quantum $FQ_CODEL_QUANTUM_DOWN "
    TQDISC_OPTS_DOWN="target $FQ_CODEL_TARGET_DOWN "
fi

WAN_IFB="ifb_${WAN_INTF}"
TC=/bin/tc
IP=/bin/ip

$TC qdisc del dev $WAN_INTF root >/dev/null 2>&1
$TC qdisc del dev $WAN_INTF ingress >/dev/null 2>&1
$TC qdisc del dev $WAN_IFB root >/dev/null 2>&1

[ "$1" == clear ] && exit 0

$TC qdisc add dev $WAN_INTF root handle 1: htb default 10
$TC class add dev $WAN_INTF parent 1: classid 1:1 htb quantum $HTB_QUANTUM_UP rate $WAN_UP_SPEED ceil $WAN_UP_SPEED
$TC class add dev $WAN_INTF parent 1:1 classid 1:10 htb quantum $HTB_QUANTUM_UP rate $WAN_UP_SPEED ceil $WAN_UP_SPEED
$TC qdisc add dev $WAN_INTF parent 1:10 handle 100: $TQDISC $TQDISC_OPTS_UP

$IP link add $WAN_IFB type ifb >/dev/null 2>&1
$TC qdisc add dev $WAN_IFB root handle 1: htb default 10
$TC class add dev $WAN_IFB parent 1: classid 1:1 htb quantum $HTB_QUANTUM_DOWN rate $WAN_DOWN_SPEED ceil $WAN_DOWN_SPEED
$TC class add dev $WAN_IFB parent 1:1 classid 1:10 htb quantum $HTB_QUANTUM_DOWN rate $WAN_DOWN_SPEED ceil $WAN_DOWN_SPEED
$TC qdisc add dev $WAN_IFB parent 1:10 handle 100: $TQDISC $TQDISC_OPTS_DOWN

$IP link set $WAN_IFB up
$TC qdisc add dev $WAN_INTF handle ffff: ingress
$TC filter add dev $WAN_INTF parent ffff: protocol all prio 10 u32 match u32 0 0 flowid 1:1 action mirred egress redirect dev $WAN_IFB