Yes, we agree that sub-optimal implementations are a bad idea. We also agree, I trust, that writing perfect reassembly code is fairly hard (although I speak from 20 year old experience). In particular the RFC 4459 and 4963 issues have to be handled. I don't have an opinion whether SEAL is necessary for that, or whether LISP can just rely on basic frag.
The code for reassembly isn't hard, it's allocating the buffers to store the arrived fragments. That's nearly impossible in hardware.
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