[Int-area] Is the UDP destination port number resource running out?// re: I-D Action: draft-ietf-intarea-gue-04.txt

[Xuxiaohu]

Hi all,

With regard to directly encapsulating IPvx packet in UDP, I think the following 
argument for using Version 1 of GUE is not valid:

"This technique saves encapsulation overhead on costly links
   for the common use of IP encapsulation, and also obviates the need to
   allocate a separate port number for IP-over-UDP encapsulation."

First, I don't think the encapsulation overhead of 4 bytes is a matter. 
However, the premise is that it's meaningful for the IETF to develop such a 
GENERIC and COVERALL encapsulation method which is still looking for nails:)  
If I remembered correctly, this draft was originally adopted by the NVO3 WG 
which is focused on multi-tenancy, although this draft has nothing to do with 
multi-tenancy:) Latter it becomes a INTAREA WG draft. by the way, did I miss 
the WG adoption call for this draft in the INTAREA WG or the WG adoption call 
isn't occurred at all?

Second, UDP itself has been widely used as a tunnel technology due to its 
load-balancing capability. See LISP [RFC6830], VXLAN [RFC7346], MPLS-in-UDP 
[RFC7510], GRE-in-UDP [RFC8086], ESP-in-UDP [RFC3948], TRILL-in-UDP, 
NSH-in-UDP, VXLAN-GPE, GENEVE, GUE, ... The destination port is used to 
distinguish these different UDP tunnel payload types. For IP-in-UDP, there has 
been a draft (https://tools.ietf.org/html/draft-xu-intarea-ip-in-udp) which was 
originally discussed in Softwire WG 
(https://tools.ietf.org/html/draft-xu-softwire-ip-in-udp) . IMHO, it seems ugly 
to use a version field within the GUE header to distinguish IPvx header from 
the GUE header itself. Is the UDP destination port number resource running out? 
If so, why not use GRE-in-UDP to carry GUE so as to save one more UDP 
destination port number? 

Third, if the GUE devotes itself to save the UDP destination port number for 
the interest of the internet community, the 2-bit version field abused as a 
payload type indicator is obviously not enough:)

Best regards,
Xiaohu

> -邮件原件-
> 发件人: Int-area [mailto:int-area-boun...@ietf.org] 代表
> internet-dra...@ietf.org
> 发送时间: 2017年5月19日 6:53
> 收件人: i-d-annou...@ietf.org
> 抄送: int-area@ietf.org
> 主题: [Int-area] I-D Action: draft-ietf-intarea-gue-04.txt
> 
> 
> A New Internet-Draft is available from the on-line Internet-Drafts 
> directories.
> This draft is a work item of the Internet Area Working Group of the IETF.
> 
> Title   : Generic UDP Encapsulation
> Authors : Tom Herbert
>   Lucy Yong
>   Osama Zia
>   Filename: draft-ietf-intarea-gue-04.txt
>   Pages   : 37
>   Date: 2017-05-18
> 
> Abstract:
>This specification describes Generic UDP Encapsulation (GUE), which
>is a scheme for using UDP to encapsulate packets of different IP
>protocols for transport across layer 3 networks. By encapsulating
>packets in UDP, specialized capabilities in networking hardware for
>efficient handling of UDP packets can be leveraged. GUE specifies
>basic encapsulation methods upon which higher level constructs, such
>as tunnels and overlay networks for network virtualization, can be
>constructed. GUE is extensible by allowing optional data fields as
>part of the encapsulation, and is generic in that it can encapsulate
>packets of various IP protocols.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-intarea-gue/
> 
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-intarea-gue-04
> https://datatracker.ietf.org/doc/html/draft-ietf-intarea-gue-04
> 
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-intarea-gue-04
> 
> 
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
> ___
> Int-area mailing list
> Int-area@ietf.org
> https://www.ietf.org/mailman/listinfo/int-area
___
Int-area mailing list
Int-area@ietf.org
https://www.ietf.org/mailman/listinfo/int-area

Re: [Int-area] I-D Action: draft-ietf-intarea-gue-extensions-01.txt

[Tom Herbert]

Hello,

I uploaded a new version of GUE extensions. In this version;

- Add option payload coverage to HMAC security. This allows a mean to
tie header authentication to the payload
- Move IANA request for flag fields to this document since this is
where they are. Also uploaded new version of GUE draft with the flag
fields request
- Fix typos, normative language, and references

Thanks,
Tom


On Thu, May 18, 2017 at 3:55 PM,   wrote:
>
> A New Internet-Draft is available from the on-line Internet-Drafts 
> directories.
> This draft is a work item of the Internet Area Working Group of the IETF.
>
> Title   : Extensions for Generic UDP Encapsulation
> Authors : Tom Herbert
>   Lucy Yong
>   Fred L. Templin
> Filename: draft-ietf-intarea-gue-extensions-01.txt
> Pages   : 31
> Date: 2017-05-18
>
> Abstract:
>This specification defines a set of the fundamental optional
>extensions for Generic UDP Encapsulation (GUE). The extensions
>defined in this specification are the group identifier, security
>option, payload transform option, checksum option, fragmentation
>option, and the remote checksum offload option.
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-intarea-gue-extensions/
>
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-intarea-gue-extensions-01
> https://datatracker.ietf.org/doc/html/draft-ietf-intarea-gue-extensions-01
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-intarea-gue-extensions-01
>
>
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> ___
> Int-area mailing list
> Int-area@ietf.org
> https://www.ietf.org/mailman/listinfo/int-area

___
Int-area mailing list
Int-area@ietf.org
https://www.ietf.org/mailman/listinfo/int-area

[Int-area] I-D Action: draft-ietf-intarea-gue-extensions-01.txt

[internet-drafts]

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Internet Area Working Group of the IETF.

Title   : Extensions for Generic UDP Encapsulation
Authors : Tom Herbert
  Lucy Yong
  Fred L. Templin
Filename: draft-ietf-intarea-gue-extensions-01.txt
Pages   : 31
Date: 2017-05-18

Abstract:
   This specification defines a set of the fundamental optional
   extensions for Generic UDP Encapsulation (GUE). The extensions
   defined in this specification are the group identifier, security
   option, payload transform option, checksum option, fragmentation
   option, and the remote checksum offload option.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-intarea-gue-extensions/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-intarea-gue-extensions-01
https://datatracker.ietf.org/doc/html/draft-ietf-intarea-gue-extensions-01

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-intarea-gue-extensions-01


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

___
Int-area mailing list
Int-area@ietf.org
https://www.ietf.org/mailman/listinfo/int-area