Hi,
As per your requirement , i think you would like to Prioritize this traffic against the Data traffic correct ?
If yes , you can check this Example on the ASA device with the configuration:-
http://www.cisco.com/c/en/us/support/docs/security/pix-500-series-security-appliances/91790-pixasa7x-traffic-mgt.html#llque
Let me know if you have any queries.
Thanks and Regards,
Vibhor Amrodia