See /etc/rc.d/blan on how to create interfaces at startup or as source to do it in automatic way;
DEV="br0" PHY="enp8s0"
# ip link add name ${DEV} type bridge # ip link set dev ${DEV} up
# ip route flush dev ${PHY} # ip addr flush dev ${PHY} # ip link set dev ${PHY} master ${DEV}
# ip addr add ${ADDR}/${MASK} dev ${DEV} broadcast +Tools Index
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