On Sat, Jan 18, 2014 at 4:22 PM, Nick Hilliard <nick@foobar.org> wrote:
extension headers are a poor idea because it's troublesome to process them on cheap hardware.
Have you found them to be more troublesome to process than IPv4 options are/were?
Because of this, packets with any sort of extension headers are routinely dropped by a large percentage of organisations. Flow labels are generally unused (i.e. set to zero by many host stacks).
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