http://www.rfc-editor.org/rfc/rfc7270.txt
RFC 7270: Cisco-Specific Information Elements Reused in IP Flow Information Export (IPFIX), A. Yourtchenko, P. Aitken, B. Claise2014-06-01T23:00:00-00:00This document describes some additional IP Flow Information Export (IPFIX) Information Elements in the range of 1-127, which is the range compatible with field types used by NetFlow version 9 in RFC 3954, as specified in the IPFIX Information Model in RFC 7012.