http://www.rfc-editor.org/rfc/rfc6938.txt
RFC 6938: Deprecation of BGP Path Attributes: DPA, ADVERTISER, and RCID_PATH / CLUSTER_ID, J. Scudder2013-05-01T23:00:00-00:00This document requests IANA to deprecate the following BGP path attributes: DPA, ADVERTISER, and RCID_PATH / CLUSTER_ID, associated with an abandoned Internet-Draft and a Historic RFC.