@article {3031, title = {Porting and performance aspects from IPv4 to IPv6: The case of OpenH323}, journal = {International Journal of Communication Systems, Wiley InterScience, Vol. 18, Issue 9}, year = {2005}, pages = { 847 - 866}, abstract = {This paper is a summary of our experiences on a case study for porting applications to IPv6. We present the results of the effort to port OpenH323, an open-source H.323 platform to IPv6, which we believe can serve as guidelines for other projects with similar goals. We briefly present the structure of the OpenH323 platform. We also discuss a number of issues arising during the porting of a platform to IPv6, like which would be the easiest approach to the porting procedure, how compatibility with earlier, IPv4-only versions of the platform could be retained, if there are any useful tools for assisting this task, how and when one could be positive that the necessary modifications had been made, and which testing procedures should be followed. We then present a variety of experiments that we conducted in order to comparatively evaluate the IPv4 and IPv6 protocol stacks. We also present the results of some initial experiments comparing IPv4 and IPv6 performance under congested network links and the conclusions that they lead us to.}, author = {Christos Bouras and Apostolos Gkamas and Kostas Stamos and Dimitris Primpas} }