http://www.rfc-editor.org/rfc/rfc7661.txt
RFC 7661: Updating TCP to Support Rate-Limited Traffic, G. Fairhurst, A. Sathiaseelan, R. Secchi2015-10-01T23:00:00-00:00This document also evaluates the Experimental specification of TCP Congestion Window Validation (CWV) defined in RFC 2861 and concludes that RFC 2861 sought to address important issues but failed to deliver a widely used solution. This document therefore reclassifies the status of RFC 2861 from Experimental to Historic. This document obsoletes RFC 2861.