As we all know an IPv6 enabled host can have multiple addresses. In order to select a source address for a to-be established outbound connection, operating systems implement a source address selection mechanism that evaluates multiple source address candidates and selects the (potentially) best candidate. Criteria for this selection are defined in RFC6724 (which obsoletes RFC 3484).
To find out if there are differences as for the way various OSs implement this mechanism we performed a little study whose results can be found in this whitepaper. Those differences might be particularly relevant for data center environments or enterprise networks with a variety of heterogeneous client operating systems. If interested in IPv6 in enterprise networks this training that I’ll give in some weeks might be worth attending for some of you, too.
Enjoy reading and everybody have a great day