I am using IPv6 and I noticed that by default SmartOS uses a flow label of 0 (no flow label) in its IPv6 datagrams. I wonder how could I enable the use of flow labels in order to be more compatible with for example, load balancers (that hash (origin ip, destination ip, flowlabel) to route to a backend server). For example, as described in https://datatracker.ietf.org/doc/rfc7098/

I checked "ndd /dev/ip6" but haven't found anything related.

Thanks.

PS: I have been bumping against this issue when accessing to a farm of dns servers, where my Illumos machines are being hitting the same backend server because flowlabel=0, while linux clients are spread to all backend servers because flowlabel=random.

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