For each network interface, Windows 2003 Server offers a GUI to configure IPv4 parameters (Internet Protocol (TCP/IP)).
After installing IPv6 there is a new item Microsoft TCP/IP Version 6. When selecting that, the “Properties” box becomes grey-out.
This means that there is no GUI to configure IPv6 parameters. You will have to use the netsh command.
This is quite simple, but it takes some effort to find out the right combination of switches to make it happen.
As an example my employer’s WindowsMedia streaming server. This box has native IPv6 connectivity.
I set the address and gateway as follows:
netsh interface ipv6 set privacy disabled netsh interface ipv6 add address interface="Local Area Connection" \ address=2001:610:148:dead:202:b3ff:fe9a:d264 store=persistent netsh interface ipv6 add route ::/0 interface="Local Area Connection" \ 2001:610:148:dead::1 store=persistent