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

[Xuxiaohu <[e-mail]>]

> -----Original Message-----
> From: Joe Touch [mailto:[e-mail]]
> Sent: Friday, June 17, 2016 12:15 PM
> To: Xuxiaohu; Tom Herbert
> Cc: [e-mail]; [e-mail]
> Subject: Re: [nvo3] [Int-area] Fwd: New Version Notification for
> draft-ietf-nvo3-gue-03.txt
> 
> 
> 
> 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.

Oh, a WG doc? a doc which has nothing to do with multi-tenancy but happens to be adopted by a WG working on multi-tenancy?

> > 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.

Your logic seems confused to me. My point is VXLAN-GPE should share the same port number (i.e., 4789) with VXLAN if the port number resource was so sparse. Unless that assumption is fake.

*******************http://www.honeypots.net/misc/services*********************
vxlan              4789        udp    Virtual eXtensible Local     [Lawrence_Kreeger]                                    [Lawrence_Kreeger]                                        2013-04-19   2014-06-17   [RFC 7348]
                                      Area Network (VXLAN)
                   4789        tcp    Reserved
                                      Generic Protocol Extension
vxlan-gpe          4790        udp    for Virtual eXtensible Local [Lawrence_Kreeger]                                    [Lawrence_Kreeger]                                        2014-08-26
                                      Area Network (VXLAN)
                   4790        tcp    Reserved
************************************************************************

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