do not mirror traffic to ifb if qos mark flag is cleared
do not mirror traffic to ifb if qos mark flag is cleared

MelvinTo/firewalla,firewalla/firewalla,MelvinTo/firewalla,MelvinTo/firewalla,MelvinTo/firewalla,firewalla/firewalla,firewalla/firewalla,firewalla/firewalla,firewalla/firewalla,MelvinTo/firewalla