Set up veth-pair OpenWrt

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I am trying to set up sqm for my wan in default OpenWrt on a Linksys3200acm, it is bridged to a Asus-dsl rt86u modem. I have installed k-modveth, ipfull, and app-luci-sqm on OpenWrt.

WAN will forward to veth0

WAN to LAN will forward to veth0

I have attempted to set it up with the following:

add veth1 to br-lan bridge

sqm egress veth0, sqm ingress veth1

apply these rules

ip link add type veth
ip link set up veth0
ip link set up veth1
ip link set veth1 master br-lan

iptables -A FORWARD -i eth1.2 -o veth0 -j ACCEPT
iptables -A FORWARD -s -i eth1.2 -d br-lan -o veth0 -j ACCEPT

This is not functional. I need a step by step guide for setting up a veth pair for OpenWrt.