Abstract
This paper describes the main issues arising during the port of the Isabel CSCW application to IPv6. Isabel has been ported to IPv6 in the European IST-1999-20393 LONG project. The port was validated in the distribution of the Madrid Global IPv6 Summit in March 2002. The distribution of the Global IPv6 Summit was a large trial where access to the conference was given with ISASBEL running over a network which includes native IPv6 parts, IPv6 over IPv4 tunnels as well as only IPv4 parts. The conclusions obtained are analyzed.