> is sup720 upgradable from pfc3a to 3bxl? Yes. Replace the PFC3A with PFC3BXL (WS-F6K-PFC3BXL in my Cisco price list). List price exactly the same as the price diff between Sup720 and Sup720-3BXL, strangely enough :-) Steinar Haug, Nethelp consulting, sthaug at nethelp.no