Value,Exchange Type,Reference
0-33,Reserved,[RFC7296]
34,IKE_SA_INIT,[RFC7296]
35,IKE_AUTH,[RFC7296]
36,CREATE_CHILD_SA,[RFC7296]
37,INFORMATIONAL,[RFC7296]
38,IKE_SESSION_RESUME,[RFC5723]
39,GSA_AUTH,[RFC-ietf-ipsecme-g-ikev2-21]
40,GSA_REGISTRATION,[RFC-ietf-ipsecme-g-ikev2-21]
41,GSA_REKEY,[RFC-ietf-ipsecme-g-ikev2-21]
42,GSA_INBAND_REKEY,[RFC-ietf-ipsecme-g-ikev2-21]
43,IKE_INTERMEDIATE,[RFC9242]
44,IKE_FOLLOWUP_KE,[RFC9370]
45-239,Unassigned,
240-255,Reserved for Private Use,[RFC7296]