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Interface ID
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... +-------------------------------+---------------------------------+
| subnet prefix | interface ID |
+-------------------------------+---------------------------------+
...
... routing prefix | subnet ID | interface ID |
+------------------------+-----------+----------------------------+
...
... identifier of a link within the site, and the
interface ID is as defined in Section 2.5.1.
All Global Unicast ...
... start with binary
000 have a 64-bit interface ID field (i.e., n + m = 64), formatted as
described in Section 2.5.1. Global Unicast addresses ...
... binary 000 have no such constraint on the size or structure of the
interface ID field.
Examples of Global Unicast ...
... starting with a binary value
other than 000 (and therefore having a 64-bit interface ID field) can
be found in [GLOBAL].
...
... 64 bits |
+----------+-------------------------+----------------------------+
|1111111010| 0 | interface ID |
+----------+-------------------------+----------------------------+
...
... +----------+-------------------------+----------------------------+
|1111111011| subnet ID | interface ID |
+----------+-------------------------+----------------------------+
...