Description: The name of the role combination. A role combination is a set of unordered roles; a role being an abstraction used to bind policies with actual interfaces on devices. Each role takes the form of a string. The value for this attribute is made available through vendor specific attributes in the RADIUS authentication message received by the EAP access point. This attribute may contain multiple roles, in the form ?+? e.g. ?Student+TeachingAssistant?. The invalid characters for a role are : ?+?, ? ? (space), null, lf, cr, bell, bs, HT (tab), VT, FF (form feed). The maximum length for a role is 31 characters. This attribute is sent with the notification.