IETF RFC 6438
Using the IPv6 Flow Label for Equal Cost Multipath Routing and Link Aggregation in Tunnels
|Publication Date:||1 November 2011|
The IPv6 flow label has certain restrictions on its use. This document describes how those restrictions apply when using the flow label for load balancing by equal cost multipath routing and for link aggregation, particularly for IP-in-IPv6 tunneled traffic.