#!/bin/sh
# Example script with more complex fq_codel hash configuration
# You can load up the network and see the behavior of the active classes
# via tc -s qdisc show dev eth2 in this case

tc qdisc del dev eth2 root

# Use small number of flows. Suitable for less than 2Mbits...
# A smaller quantum prioritizes smaller packets over bigger ones, also useful at low bandwidths

tc qdisc add dev eth2 handle a root fq_codel flows 16 quantum 300

# catch-all filter for protocol types that don't match. We just do this so packets
# aren't dropped on the floor while we add more filters

tc filter add dev eth2 parent a: protocol all prio 999 u32 match ip protocol 0 0x00 flowid a:f

# match multicast packets and give them their own bin.
# There is no need to segregate ipv6 and ipv4 traffic here, this is just an example

tc filter add dev eth2 parent a: protocol ip prio 5 u32 match u8 0x01 0x01 at -14 flowid a:9
tc filter add dev eth2 parent a: protocol ipv6 prio 6 u32 match u8 0x01 0x01 at -14 flowid a:9

# What the heck, toss arp into its own bin
tc filter add dev eth2 parent a: protocol arp prio 7 u32 match u8 0x01 0x01 at -14 flowid a:a

# Give EF traffic its own bin. Ideally this would be *bins*. Using map, rather than hash?
# Secondly, this doesn't work for some reason. Neither does ff or 3f as a mask
# tested with netperf -Y EF,EF fd01::1 and on ipv4 and with numeric constants too.
# e2? WTF?

tc filter add dev eth2 parent a: protocol ip prio 8 u32 match ip tos 0x2e fc flowid a:b
tc filter add dev eth2 parent a: protocol ipv6 prio 9 u32 match ip6 priority 0x2e fc flowid a:b

# Stick traffic marked interactive into the EF bin too. Would be better to give them their
# own bins....

tc filter add dev eth2 parent a: protocol ip prio 10 u32 match ip tos 0x08 0xfc flowid a:b
tc filter add dev eth2 parent a: protocol ipv6 prio 11 u32 match ip6 priority 0x08 0xfc flowid a:b

# Toss CS1 background into its own bin, too.  Segregate ipv6 for sake of example
# This DOES work, unlike EF (netperf -Y CS1,CS1 fd01::1)
# But should be bins in a larger configuration

tc filter add dev eth2 parent a: protocol ip prio 12 u32 match ip tos 0x20 0xfc flowid a:c
tc filter add dev eth2 parent a: protocol ipv6 prio 13 u32 match ip6 priority 0x20 0xfc flowid a:d

# Not entirely clear to me if using the pre-natted ip stuff works always

tc filter add dev eth2 parent a: handle 3 protocol ipv6 prio 94 flow hash keys proto-dst,rxhash divisor 8
tc filter add dev eth2 parent a: handle 4 protocol all prio 97 flow hash keys proto-dst,nfct-src divisor 8