http://www.rfc-editor.org/rfc/rfc7098.txt
RFC 7098: Using the IPv6 Flow Label for Load Balancing in Server Farms, B. Carpenter, S. Jiang, W. Tarreau2014-01-01T23:00:00-00:00This document describes how the currently specified IPv6 flow label can be used to enhance layer 3/4 (L3/4) load distribution and balancing for large server farms.