As regras abaixo faz com que o ping(icmp) tenha prioridade encima de qualquer pacote. Regras: /ip firewall mangleadd chain=prerouting action=mark-connection new-connection-mark=ICMP_PING passthrough=yes protocol=icmp add chain=prerouting action=mark-packet new-packet-mark=ICMP_PKT passthrough=no protocol=icmp connection-mark=ICMP_PING /queue simple   add name=”ICMP” target-addresses=192.168.1.0/24      interface=all parent=Total packet-marks=ICMP_PKT direction=both priority=1 queue=default-small/default-small      limit-at=0/0 max-limit=2M/2M burst-limit=0/0 burst-threshold=0/0 burst-time=0s/0s total-queue=default-small