Re: [Sdn] Poll for RG Adoption - draft-contreras-sdnrg-layered-sdn

Gert Grammel <> Sun, 21 February 2016 17:43 UTC

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From: Gert Grammel <>
To: "King, Daniel" <>, "''" <>
Thread-Topic: [Sdn] Poll for RG Adoption - draft-contreras-sdnrg-layered-sdn
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Date: Sun, 21 Feb 2016 17:43:05 +0000
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Subject: Re: [Sdn] Poll for RG Adoption - draft-contreras-sdnrg-layered-sdn
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It contributes to abstraction in the context of SDN. In IETF
change/ discusses such abstraction for the purpose of Traffic Engineering
but doesn¹t deal with the service. Also aspects like QoS have not been
tackled there.

Going forward, the aspect of transport attached services would need to be
worked out more explicitly to harden the abstraction.
1) A DSL service is attached to a particular copper cable that cannot be
virtualised. Moving a home Gateway to another DSL Line wouldn¹t provide a
service. So the transport is an essential part of the service.
2) For a Mobile service, one can move a SIM card between devices (even if
not owned by the same person) and get a service. Whether this service is
the same between devices however depends on the Mobile phone capabilities.
Here the SIM-HW is part of the service, but the transport (Mobile) is not.
3) A VoIP service can be made available on practically any device
connected by any transport to the internet, but access to that service may
be limited by firewall policies and alike. Here no HW is part of the
service but transport influences the quality.

So linking transport related information with service related information
in an efficient and abstracted manner is indeed an issue and worth to look
at. A collaborative architecture seems to be a good sarting point.


On 2016-15-02 14:26, "sdn on behalf of King, Daniel" <
on behalf of> wrote:

>Greetings SDN Researchers,
>At IETF 94 we had a request from the authors of "Cooperating Layered
>Architecture for SDN" to poll the Research Group for adoption of their
>o If you missed their presentation at IETF 94 -
>o The current version of the document -
>We would like to open a two-week adoption call the document, but
>specifically ask that a "support" or "no support" response be
>substantiated with accompanying comments discussing why the document
>should be adopted, or indeed not.
>Kind Regards,
>Dan & Kohei