http://www.rfc-editor.org/rfc/rfc6842.txt
RFC 6842: Client Identifier Option in DHCP Server Replies, N. Swamy, G. Halwasia, P. Jhingran2013-01-01T23:00:00-00:00This document updates RFC 2131 "Dynamic Host Configuration Protocol" by addressing the issues arising from that document's specification that the server MUST NOT return the 'client identifier' option to the client. [STANDARDS-TRACK]