Easy way to detect EAP

Is there a more reliable method of detecting EAP then checking for the presence of an EAP-Message, I heard mention of an EAP-Type attribute... guessing this is set by the EAP module in authorize ? Is this a control attribute ? -- Arran Cudbard-Bell (A.Cudbard-Bell@sussex.ac.uk) Authentication, Authorisation and Accounting Officer Infrastructure Services | ENG1 E1-1-08 University Of Sussex, Brighton EXT:01273 873900 | INT: 3900