You don't get a lot success, if you're running an IPv6-ready kernel, but have no tools to configure IPv6. There are exist some in several packages to configure IPv6.
The net-tool packages include some tools like ifconfig and route, which helps you configure IPv6 on an interface. Look at the output of ifconfig -? or route -?, if something is shown like IPv6 or inet6, then the tool is IPv6-ready.
Auto-magically check:
# /sbin/ifconfig -? 2>& 1|grep -qw 'inet6' && echo "utility 'ifconfig' is ¬ IPv6-ready" |
Same check can be done for route:
# /sbin/route -? 2>& 1|grep -qw 'inet6' && echo "utility 'route' is IPv6-ready" |
Alexey N. Kuznetsov (current a maintainer of the Linux networking code) created a tool-set which configure networks through the netlink device. Using this tool-set you are able to do more than using net-tools, but the documentation is not very well for newbies.
# /sbin/ip 2>&1 |grep -qw 'inet6' && echo "utility 'ip' is IPv6-ready" |
If the program /sbin/ip isn't found, then I very recommend to install the iproute package.
You can get it from your Linux distribution (if contained)
You can download the tar-ball and recompile it: Original FTP source and mirror (missing)
You've able to look for a proper RPM package at RPMfind/iproute (sometimes rebuilding of a SRPMS package is recommended)