Dear Groupstudy, I am working in the lab on a project using ATM and Transparent Lan Services. I am looking at the affects of SAR and I am using ttcp between two end points to measure performance. ttcp is an undocumented utility and fairly straight forward using the defaults. However I need to understand more of the report data that ttcp provides. Can anyone provide any info on really using ttcp to it's fullest? tia Kevin Wigle CCDP/CCNP.............. _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]