Value,GSA Attributes,Format,Multi-Valued,Used in Protocol,Reference
0,Reserved,,,,[RFC-ietf-ipsecme-g-ikev2-21]
1,GSA_KEY_LIFETIME,TLV,NO,"GIKE_UPDATE, AH, ESP",[RFC-ietf-ipsecme-g-ikev2-21]
2,GSA_INITIAL_MESSAGE_ID,TLV,NO,GIKE_UPDATE,[RFC-ietf-ipsecme-g-ikev2-21]
3,GSA_NEXT_SPI,TLV,YES,"GIKE_UPDATE, AH, ESP",[RFC-ietf-ipsecme-g-ikev2-21]
5-16383,Unassigned,,,,
16384-32767,Reserved for Private Use,,,,