>This is especially important if the implementation should keep track of
>flow labels across reboots. I see no good way of doing this except
>writing the labels in some kind persistent storage. And consider
>operating system crashes etc. where this may not be possible. The only
>sane way seems to be to use random flow labels (or at least randomize the
>point where to begin using flow labels after a reboot); there are no
>problems if one does not have too high expectations of the lifetime of the
>uniqueness.
i completely agree with this statement. can't always reliably keep
flow label value into persistent store, so something like "start from
random number on reboot, and monotonically increase value" makes
more sense.
itojun
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