+.TP
+.BI "avpair " attribute=value
+Adds an Attribute-Value pair to be passed on to the RADIUS server on each request.
+.TP
+.BI map-to-ifname
+Sets Radius NAS-Port attribute to number equal to interface name (Default)
+.TP
+.BI map-to-ttyname
+Sets Radius NAS-Port attribute value via libradiusclient library