ola amigo, verifique se os parametros se adequeam a sua faixa de ip,
eles são inseridos em:
/ ip firewall mangle
; Market Pocket - Voip
chain=prerouting protocol=udp src-port=10000-20000
action=mark-connection new-connection-mark=Voip passthrough=yes
4 chain=prerouting protocol=udp src-port=5060 action=mark-connection
new-connection-mark=Voip passthrough=yes
5 chain=prerouting tos=184 action=mark-connection new-connection-mark=Voip
passthrough=yes
6 chain=prerouting connection-mark=Voip action=mark-packet
new-packet-mark=Voip passthrough=yes
7 chain=prerouting connection-mark=Voip action=change-tos new-tos=184
8 ;;; Clientes Voip
chain=prerouting dst-address=10.1.1.1 action=mark-connection
new-connection-mark=Voip passthrough=yes
em 10.1.1.1 coloque o ip do cliente.