Some Cisco Catalystswitches also support a kind of Weighted Round Robin Queuing as the 2950 switch, with 4 queues  in where  you can configure to place frames with specific CoS marking  . You can also assign a specific weight on these queues which will be handled by the round-robin fashion cycle.

On this switch , queue 4 is designated as an “expedite” queue which give priority treatment to frames in that queue.

Please note that if you want to configure this queue as an expedite queue , you must put its weight to 0.