5.7. IPv6 Prefix

0          8          16         24        31
.-------------------------------------------.
| Protocol |   PDU    |                     |
| Version  |   Type   |         zero        |
|    1     |    6     |                     |
+-------------------------------------------+
|                                           |
|                 Length=32                 |
|                                           |
+-------------------------------------------+
|          |  Prefix  |   Max    |          |
|  Flags   |  Length  |  Length  |   zero   |
|          |  0..128  |  0..128  |          |
+-------------------------------------------+
|                                           |
+---                                     ---+
|                                           |
+---            IPv6 Prefix              ---+
|                                           |
+---                                     ---+
|                                           |
+-------------------------------------------+
|                                           |
|         Autonomous System Number          |
|                                           |
`-------------------------------------------'

Analoga alla PDU prefisso IPv4, ha 96 bit in più e nessuna magia.