Layer
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... as a unicast point-to-point link layer. The mechanism is intended as
a start-up transition tool ...
... the corporate IPv4 backbone would serve as the virtual link layer for
individual corporate sites using 2002:: prefixes. The V4ADDR ...
... to the lack of sufficient information in the "unreachable" message.
This means that the IPv4 network will appear as an undiagnosable link
layer for IPv6 operational purposes. Other considerations are as
described in Section 4.1.3 of [MECH ...