ping cmp

/ip firewall mangle
add action=change-dscp chain=postrouting disabled=no new-dscp=1 passthrough=\
yes protocol=icmp
add action=change-dscp chain=postrouting disabled=no dst-port=53 new-dscp=1 \
passthrough=yes protocol=udp
add action=change-dscp chain=postrouting disabled=no dst-port=53 new-dscp=1 \
passthrough=yes protocol=tcp
add action=mark-connection chain=postrouting disabled=no dscp=1 \
new-connection-mark=ping_con passthrough=yes
add action=mark-packet chain=postrouting connection-mark=ping_con disabled=no \
new-packet-mark=ping_pkt passthrough=no