Dear VXLAN-gpe Authors, VXLAN-gpe is a great extension to VXLAN, providing L3 encapsulation directly. However, considering the precious space in VXLAN header, it might be better if you could consider shrinking the size of protocol type field. For my understanding there is only several ethertype values really required, such as IPv4/v6. Could you help rule out the possibilities and then shrink the field size to e.g. 8 bits or less? 8 bits should be far beyond enough for this protocol type field even considering future extensions. But it would be so helpful for other extension possibilities to VXLAN. For example discussed in:
http://www.ietf.org/mail-archive/web/nvo3/current/msg03388.html And it is likely that there will be more extension coming to VXLAN, if it is going to survive in the fast pace of innovation on network overlay. IMHO, even 0x6558, which is mentioned in section 4.2, is not required, because VXLAN VTEP will ignore the P bit and the protocol type anyway, so why not setting P bit to 0 in this situation? --- Best regards, Han
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