1altq on em0 cbq( codel default ) bandwidth 20Mb tbrsize 12000 queue { qmain } 2queue qmain { q1 q2 } 3queue q1 bandwidth 60% 4queue q2 bandwidth 40% priority 2 5pass on em0 all flags S/SA keep state queue q1 6block drop on em0 all queue q2 7