+--------------------------------------------------+
| Address Family Identifier (16 bits)              |
+--------------------------------------------------+
| Subsequent Address Family Identifier (8 bits)    |
+--------------------------------------------------+
| Flags for Address Family (8 bits)                |
+--------------------------------------------------+
| Long-Lived Stale Time (24 bits)                  |
+--------------------------------------------------+
| ...                                              |
+--------------------------------------------------+
| Address Family Identifier (16 bits)              |
+--------------------------------------------------+
| Subsequent Address Family Identifier (8 bits)    |
+--------------------------------------------------+
| Flags for Address Family (8 bits)                |
+--------------------------------------------------+
| Long-Lived Stale Time (24 bits)                  |
+--------------------------------------------------+