Outstanding RADIUS accounting issues

[Nick Lowe]

I should clarify point 5. When the association id is available, this
should be in the NAS-Port attribute. Where it is not, the ifindex
should be in the NAS-Port attribute.

RFC 3580 says:

3.4.  NAS-Port

   For use with IEEE 802.1X the NAS-Port will contain the port number of
   the bridge, if this is available.  While an Access Point does not
   have physical ports, a unique "association ID" is assigned to every
   mobile Station upon a successful association exchange.  As a result,
   for an Access Point, if the association exchange has been completed
   prior to authentication, the NAS-Port attribute will contain the
   association ID, which is a 16-bit unsigned integer.  Where IEEE
   802.1X authentication occurs prior to association, a unique NAS-Port
   value may not be available.

Nick