Global Unicast
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... Local communications will use link-local addresses in many cases but
may also use global unicast addresses when configuring global
addresses ...
... multicast, etc.) and scope
(link-local, global unicast, etc.) of source and destination
addresses. In some cases, it may be desirable to filter on the Code
...
... During normal operations, these messages will have destination
addresses, mostly link local but in some cases global unicast
addresses, of interfaces ...
... that changes may be made to allow the use of unique local addresses
or global unicast addresses. Should this happen, it will be
essential to explicitly filter ...