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Re: [DMM] Presentation of https://datatracker.ietf.org/doc/draft-zzhang-bess-ipvpn-payload-only/

Uma Chunduri <umac.ietf@gmail.com> Sat, 05 November 2022 06:39 UTC

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From: Uma Chunduri <umac.ietf@gmail.com>
Date: Fri, 04 Nov 2022 23:39:21 -0700
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To: "Jeffrey (Zhaohui) Zhang" <zzhang=40juniper.net@dmarc.ietf.org>
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Subject: Re: [DMM] Presentation of https://datatracker.ietf.org/doc/draft-zzhang-bess-ipvpn-payload-only/
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"For example, PE1 can advertise a label for a (source, destination,

   IP/UDP payload type) tuple with the local semantics being that
   incoming traffic will be encapsulated in an IP or IP+UDP header and
   then routed out.  When PE2 receives IP or IP+UDP traffic from the
   UPF, if there is a label for the corresponding (source, destination,
   IP/UDP payload type) tuple, it removes the IP or IP/UDP headers and
   simply transport the remaining payload.  In this 5G scenario, it is
   still GTP - just that the IP/UDP headers are not present between PE1
   and PE2.

"

Very useful.

And this doesn't have to be tied to GTP overlays.  I would recommend
generalizing this (just keep the overlay header intact) - though you can
point to GTP as an example.
UDP might be needed for load balancing the traffic in the transport
network. So better to keep this intact.
UDP Src port (is one way) to encode the slicing information as specified in
https://datatracker.ietf.org/doc/html/draft-ietf-dmm-tn-aware-mobility

Thx!
--
Uma C.

On Thu, Jul 28, 2022 at 6:08 PM Jeffrey (Zhaohui) Zhang <zzhang=
40juniper.net@dmarc.ietf.org> wrote:

> Hi,
>
> Due to a glitch the slides for the above draft were not available so it
> was not presented as planned in the DMM session in IETF114.
> However, it was presented in the BESS session and the following are the
> video recording and slides:
>
> https://youtu.be/V2r68JhrQag?t=660
>
> https://datatracker.ietf.org/meeting/114/materials/slides-114-bess-draft-zzhang-bess-ipvpn-payload-only-00
>
> The direct use case that triggered the draft is GTP-U transportation, so I
> hope it is of interest to this group. Appreciate your comments.
>
> Thanks.
> Jeffrey
>
> Juniper Business Use Only
>
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