Thanks alot Tom,             It works...!!!!!! :-) ... View more

Hi tom, thanks for the reply. but still i couldnt get the answer.           Here i give you the brief. i am going to connect 20 access point in that cisco sg-300 switch. wifi users access the internet through access points which is connected to cisco sg-300 switch. In order to reduce traffic in cisco sg-300 switch, i will assign port 1 as an uplink for internet. port 1 (internet link) port 2----access point 1---- wifi users(10 to 20 no's) port 3---- access point 2-----wifi users (10 to 20 no's) port 4----access point 3 ------wifi users (10 to 20 no's) in this case port 2 and port 1 should be communicate,( to provide internet for wifi users's) next            port 3 and port 1 should be communicate,(to provide internet for wifi users) next            port 4 and port 1 should be communicate.(to provide internet for wifi users) and now,                 port 2 and port 3 traffic must be blocked. (i dont know how to do this,, but i want to)                  port 2 and port 4 traffic also must be blocked                 port 3 and port 4 traffic must be blocked. that's all? How to do this? ... View more