ebtables -t nat -F J-vnet0-stp-xyz
ebtables -t nat -X J-vnet0-stp-xyz
ebtables -t nat -N J-vnet0-stp-xyz
ebtables -t nat -A libvirt-J-vnet0 -d 01:80:c2:00:00:00 -j J-vnet0-stp-xyz
ebtables -t nat -F P-vnet0-stp-xyz
ebtables -t nat -X P-vnet0-stp-xyz
ebtables -t nat -N P-vnet0-stp-xyz
ebtables -t nat -A libvirt-P-vnet0 -d 01:80:c2:00:00:00 -j P-vnet0-stp-xyz
ebtables -t nat -A P-vnet0-stp-xyz -s 01:02:03:04:05:06/ff:ff:ff:ff:ff:ff \
-d 01:80:c2:00:00:00 --stp-type 18 --stp-flags 68 -j CONTINUE
ebtables -t nat -A J-vnet0-stp-xyz -s 01:02:03:04:05:06/ff:ff:ff:ff:ff:ff \
-d 01:80:c2:00:00:00 --stp-root-pri 4660:9029 \
--stp-root-addr 06:05:04:03:02:01/ff:ff:ff:ff:ff:ff \
--stp-root-cost 287454020:573785173 -j RETURN
ebtables -t nat -A P-vnet0-stp-xyz -s 01:02:03:04:05:06/ff:ff:ff:ff:ff:ff \
-d 01:80:c2:00:00:00 --stp-sender-prio 4660 --stp-sender-addr 06:05:04:03:02:01 \
--stp-port 123:234 --stp-msg-age 5544:5555 --stp-max-age 7777:8888 \
--stp-hello-time 12345:12346 --stp-forward-delay 54321:65432 -j DROP