• Wanted to let everyone know that I've submitted feature request 8599 for IPv6 flow label support in pfSense.

    Here's a short list of possible uses for IPv6 flow labels in pfSense:

    Windows 10 now populates IPv6 flow labels by default:

    Beginning with the Creators Update, outbound TCP and UDP packets over IPv6 have this field set to a hash of the 5-tuple (Src IP, Dst IP, Src Port, Dst Port).  Middleboxes can use the FlowLabel field to perform ECMP for in-encapsulated native IPv6 traffic without having to parse the transport headers.  This will make IPv6 only datacenters doing load balancing or flow classification more efficient.


  • It's also been in Linux for a while.