IPv6 link-local address format

Question

I am working on a project related to networking/compression. One of the machines is Windows Vista, which already has IPv6 configured.

When I try ipconfig

Answer 1

The number after % is the interface name. if you open the status->detail of your network interface, you will see the ipv6 link-local address, with the %xx at the end of the address, which is the index of the interface, in case you want to find the index for some application. The System Information or ipconfig might just give you different index numbers, at least on my Windows 7 Pro, which is very confusing. The description you get from the OS could also be wrong.