Re: [nvrg-bof] Updated charter proposal

[Xavier Hesselbach Serra <xavierh at entel.upc.edu>]

Dear Martin,

    we think that your document reflects the state of the art
in network virtualization. There is some running works (research
and testbeds).
    We are working in the Manticore Project (close to the
Federica project), both with the participation of i2CAT, where we are 
collaborating.
    Anyway, we would like to add some comments:

1) we think that network virtualization should permit an
enhancement of the business model to use foreign network
resources to build up the owned network, according
to permissions of the users (human or services).
2) Virtual internetworking could be included (interconnection
of VNs).
3) We didn't understand the meaning of the second half of the
4th paragraph.

   Do not hesitate in contact us.

    Best,
      Juan Felipe Botero and Xavier Hesselbach

===========================================
Dr. Xavier Hesselbach-Serra
Associate Professor
Dept. Enginyeria Telemàtica
Universitat Politècnica de Catalunya
C/Jordi Girona, 1 i 3
Mòdul C3 - Campus Nord
08034 Barcelona
Tel: + 34 93 401 59 87
Fax: + 34 93 401 10 58
e-mail: xavier.hesselbach at entel.upc.edu
===========================================

===========================================
Juan Felipe Botero
PhD. Student
Dept. Enginyeria Telemàtica
Universitat Politècnica de Catalunya
C/Jordi Girona, 1 i 3
Mòdul C3 - Campus Nord
08034 Barcelona
e-mail: jfbotero at entel.upc.edu
===========================================

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Martin Stiemerling escribió:
> Hi all,
>
> Here is the updated charter proposal. Let me know your comments.
>
>   Martin
>
> Draft charter for the Virtual Networks Research Group VNRG) proposal
>
> VERSION: 2009-05-22 0800 UCT
>
> Recent developments in networking are aiming at better utilizing infrastructure
> in terms of reusing a single physical or logical resource for multiple other
> network instances, or to aggregate multiple these resources to obtain more
> "functionality". These resource can be network components, such as, for
> example, routers, switches or hosts, and also services, such as, for example,
> name mapping systems. Typically, this is referred to as Virtual Networks, where
> a resource is either re-used for multiple networks or multiple resources are
> aggregated for virtual resource.
> Important properties of Virtual Networks are i) the level of participation
> of each resource and ii) the clear separation of any virtual network to all
> others. Each resource can be sliced so that it can be part of multiple 
> Virtual Networks, but on the other hand does virtualization guarentee the
> clear separation of each network, so that actions in one network do not affect
> the operation of any other network. 
>
> However, in the network community, Virtual Networks is a very  
> broad term, ranging from running multiple wave lengths over a fiber,  
> MPLS, virtual routers, to overlay systems. This leads to deployment of  
> single technologies in parts of the Internet or other IP-based  
> networks, but lacks a common understanding of what virtualized networks
> is causing to IP-based networks, or how Virtual Networks is applied
> in favorable way.  This leads to the introduction of virtualization in an
> uncoordinated way between the various players, such as network operators,
> vendors, service providers and testbed providers (e.g. GENI, FEDERICA, etc)
> without considerations about the overall impact on the system level. 
>
> The Virtual Networks Research Group (VNRG)  provides a forum for  
> interchange of ideas among a group of network researchers with an  
> interest in network virtualization in the context of the Interent and  
> also beyond the current Internet.
>
> The RG works on a set of principles of virtual networks that a single
> physical resource can be re-used by multiple entities with a clear separation
> between the actions taken by the single entities. Virtualization delivers an
> abstraction to the user (i.e., not necessarily a human but a service or
> whatever) referring to the decoupling from the physical resource, i.e., 
> the abstraction is not bound to a single resource but can be relocated
> but is a logical structure. Virtualization also offers recursion, i.e., an
> already virtualized network can again include virtual networks.
>
>
> The group will address the following research challenges:
> - Consider a whole system for virtualized networks and not only single
>   components or a limited set of components;
> - Identifying architectural challenges resulting from virtual networks;  
> - Recursive network management of virtual networks;
> - Emerging technological and implementation issues.
>
>
> Web site: http://user.informatik.uni-goettingen.de/~stiemer/nvrg/
>
> Mailing list:  Open mailing list to anybody, just needs signing up  
> with the list
> list's address: nvrg at listserv.gwdg.de
> signing up: https://listserv.gwdg.de/mailman/listinfo/nvrg
>
>
>
>
> stiemerling at nw.neclab.eu
>
> NEC Laboratories Europe - Network Research Division
> NEC Europe Limited | Registered Office: NEC House, 1 Victoria Road, London W3 6BL | Registered in England 2832014