Re: [nvo3] [Int-area] Fwd: New Version Notification for draft-ietf-nvo3-gue-03.txt

[Joe Touch <[e-mail]>]

On 6/16/2016 6:48 PM, Xuxiaohu wrote:
> Tom,
>
> What's the real benefit of such implementation of IP-in-UDP compared to the
>> approach as described draft-xu-intarea-ip-in-udp-03? Save one UDP port
>> number?
>> Yes, saves a port number.

More than that, GUE was accepted as a WG doc *and* has already been
assigned a port number.

> To save a port number, the header format is made ugly. Is it worthwhile? If UDP port resource was so sparse as you had imagined, I think the UDP port resource keeper would not allocate two different port numbers for VXLAN and VXLAN-GPE since the P-bit in VXLAN-GPE header is enough to distinguish VXLAN-GPE from VXLAN. For more details, please look at section 3.2 of (https://tools.ietf.org/html/draft-ietf-nvo3-vxlan-gpe-02#page-6). 
VXLAN was assigned in 2011.

VXLAN-GPE was assigned this year (2016).

If what you say is correct*, then you might be correct in assuming that
a VXLAN-GPE assignment might inhibit a later VXLAN assignment, but
that's not the order things happened.

*(I haven't looked and don't plan to, because the point is irrelevant
even if assumed)

Joe