1                   2                   3
 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+---------------+---------------+---------------+---------------+
|     Type (=T_DISC_REQHDR)     |             Length            |
+---------------+---------------+-------+-------+-------+-+-+-+-+
|           Request ID          |SkipHop|      Flags    |V|F|O|C|
+---------------+---------------+-------+-------+-------+-+-+-+-+