On Feb 7, 2019, at 11:58, Yasuyuki Tanaka <[email protected]> wrote:
> 
> If you receive a fragment having a fragment_tag which you've already seen and 
> the fragment_tag is not associated with any entry in the VRB table, you can 
> consider it as a duplicate or late-arriving fragment. Then, you can drop the 
> received fragment safely.

That means you need a second table of datagram_tag values “already seen and 
done” (obviously with a timeout, or maybe with some serial number logic).
Maybe not a bad optimization to handle trailing duplicates.

Grüße, Carsten

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