Value,Authentication Type Code,Reference
0,Reserved,"[ISO 10589, ""Intermediate System to Intermediate System Intra-
Domain Routeing Exchange Protocol for use in Conjunction
with the Protocol for Providing the Connectionless-mode
Network Service (ISO 8473)"", International Standard 10589:
2002, Second Edition, 2002.]"
1,Cleartext Password,"[ISO 10589, ""Intermediate System to Intermediate System Intra-
Domain Routeing Exchange Protocol for use in Conjunction
with the Protocol for Providing the Connectionless-mode
Network Service (ISO 8473)"", International Standard 10589:
2002, Second Edition, 2002.]"
2,ISO 10589 Reserved,"[ISO 10589, ""Intermediate System to Intermediate System Intra-
Domain Routeing Exchange Protocol for use in Conjunction
with the Protocol for Providing the Connectionless-mode
Network Service (ISO 8473)"", International Standard 10589:
2002, Second Edition, 2002.]"
3,Cryptographic Authentication (CRYPTO_AUTH),[RFC5310]
4-53,Unassigned,
54,HMAC-MD5 Authentication,[RFC5304]
55-254,Unassigned,
255,Routing Domain private authentication method,"[ISO 10589, ""Intermediate System to Intermediate System Intra-
Domain Routeing Exchange Protocol for use in Conjunction
with the Protocol for Providing the Connectionless-mode
Network Service (ISO 8473)"", International Standard 10589:
2002, Second Edition, 2002.]"