Hi GPE authors,
I recently review the GPE draft and the shim header design. I saw the "Next Protocol" assigned to GBP changed from 0x6 to 0x80, and the reference of [I-D.lemon-vxlan-lisp-gpe-gbp] should be updated from version 01 to version 02 which confused me in my first reading. I am not clear why GBP do such kind of update, do you have any design principles for the "Next Protocol" assignment for range from 0x80 to 0xFF? Some practical design principles in the document would benefit the industry.
And since shim header is a TLV style, I tend to ask if it would be practical to restrict the shim header to be used only for OAM and control purpose. That would greatly simplify the ASIC design.
Regards
Lizhong
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