From: Craig Finseth [snark17(_at_)gmail(_dot_)com]
You've just rediscovered what the "link local" part of the link-local
address means: the address is local to the link! It is not globally
unique or even unique within a host, it is just unique within a link.
Actually, it's globally *unique*, because it contains the MAC address.
The problem is that it's not *routable*, even within the context of a
single host. And unless you give an application on the host guidance,
it depends on host-context routing to get its output packets to the
correct wire. It's hard to remain aware that host-context routing is
important, because it's almost always worked.
Dale