anis wrote: Dear all, I am trying to catch hold of QoS. Well, right now I am using a stand alone 3550 Switch for practice. Right now my plan is not to trust anything on this switch. For this: I implemented mls qos on the switch. I have classified four groups named high(voice), critical (company defined critical applications), moderate (http, smtp, pop3), all (all other). And gave them four dscp values like i) ef , ii) af3 iii) af4 iv) default. Now, I need to know two things: 1. Does the above configuration set the traffic into four groups accurately. If not, what else should I do create four queues according to this configuration? 2. I want to allow 40% traffice to the first queue (considering that 4 queue's has been configured) and rest of the queues will each get 20%. Now, which command will be used here to do that. Thank you.