ns with TCP/IP over ATM support

You're much better off looking at University of New Hampshire ATM work for ns-2.

This material is currently available:

• Source Code (tar.gz format)
• Installation
• Basic Design
• User Manual (postscript (ps), portable document format (pdf))
• Programmer's Manual (postscript (ps), portable document format (pdf))

Syed Ijlal Ali Shah appears to be the responsible supervisor.