David Stevens wrote:

netdev-owner@vger.kernel.org wrote on 10/29/2007 11:03:37 AM:

quoted

So, I am looking for technical reasons why this is permitted.

Vlad,
        Is there a technical reason to disallow it? Rather than
anticipate all the possible uses for a machine, it's, of course,
generally better to restrict only the things you know can't
work, and allow everything else.

                                                        +-DLS

For v4, not really, but it really confuses some people (and thus causes
me headaches ;-)

For v6, there are plenty of operational reasons to not allow this.  You really
turn unicast into anycast when you do this and there are special rules to
be followed.

-vlad