I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG.  These comments were written primarily for the benefit of the security area directors. Document editors and WG chairs should treat these comments just like any other last call comments.

The document updates RFC5247 to specify EAP Session-ID definition in case fast re-authentication is used with EAP-AKA and EAP-SIM. The Session-ID definition is based on a server-generated nonce and a MAC. The document also specifies the Session-ID definition for the PEAP method, following the definition of EAP-TLS.

The document is clear and well written. Security considerations section is clear and states no known security issues in the definitions used. A reference to PEAP is missing.

Nits:
Section 3: s/to not modify/do not modify