RFC 4291:IP Version 6 Addressing Architecture
RFC-Ref

physical interface


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... unicast address or a set of unicast addresses may be assigned to multiple physical interfaces if the implementation treats the multiple physical interfaces as one interface ...
... multiple physical interfaces if the implementation treats the multiple physical interfaces as one interface when presenting it to the internet ...
... internet layer. This is useful for load-sharing over multiple physical interfaces. Currently, IPv6 ...
... node to send an IPv6 packet to itself. It must not be assigned to any physical interface. It is treated as having Link-Local scope, and may be thought of as the Link-Local ...



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