Valeurs des champs type et code d'ICMPv6
| type | code | nature | 
| 1       Source Link-layer Address               [RFC4861] | 
| 2       Target Link-layer Address               [RFC4861] | 
| 3       Prefix Information                      [RFC4861] | 
| 4       Redirected Header                       [RFC4861] | 
| 5       MTU                                     [RFC4861] | 
| 6       NBMA Shortcut Limit Option              [RFC2491] | 
| 7       Advertisement Interval Option           [RFC3775] | 
| 8       Home Agent Information Option           [RFC3775] | 
| 9       Source Address List                     [RFC3122] | 
| 10      Target Address List                     [RFC3122] | 
| 11      CGA option                              [RFC3971] | 
| 12      RSA Signature option                    [RFC3971] | 
| 13      Timestamp option                        [RFC3971] | 
| 14      Nonce option                            [RFC3971] | 
| 15      Trust Anchor option                     [RFC3971] | 
| 16      Certificate option                      [RFC3971] | 
| 17      IP Address/Prefix Option                [RFC5568] | 
| 18      New Router Prefix Information Option    [RFC4068] | 
| 19      Link-layer Address Option               [RFC5568] | 
| 20      Neighbor Advertisement Acknowledgment   [RFC5568] | 
| Option | 
| 21-22   Unassigned | 
| 23      MAP Option                              [RFC4140] | 
| 24      Route Information Option                [RFC4191] | 
| 25      Recursive DNS Server Option             [RFC5006] | 
| 26      RA Flags Extension Option               [RFC5175] | 
| 27      Handover Key Request Option             [RFC5269] | 
| 28      Handover Key Reply Option               [RFC5269] | 
| 29      Handover Assist Information Option      [RFC5271] | 
| 30      Mobile Node Identifier Option           [RFC5271] | 
| 31-137  Unassigned | 
| 138     CARD Request option                     [RFC4065] | 
| 139     CARD Reply option                       [RFC4065] | 
| 140-252 Unassigned | 
| 253     RFC3692-style Experiment 1 (*)          [RFC4727] | 
| 254     RFC3692-style Experiment 2 (*)          [RFC4727] |