We are currently using two HSSI on 3660 (running up to 20Mbps/interface). What would you recomment if we want higher performance and support higher bandwidth, 4500 or 7200, other? Thanks Ruihai _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]