Hello, A patch for multi-channel multi-interface support has been designed depending on the document named "Adding Multiple Interface Support in NS-2" by Ramon Aguero Calvo and Jesus Perez Campo, University of Cantabria. The patch can be found on the following link: http://mohittahiliani.blogspot.com/2010/03/adding-multiple-interface-support-in-ns.html Hope it helps. Regards,Mohit P. Tahiliani