I think "interoperability" would be a very good focus of the group. We might generalize it to include interoparability between virtual networks as well as interoperability between the control frameworks. Kind regards, Carmelita ---------------------------------------- FISS'09: Future Internet Summer School http://www.comnets.uni-bremen.de/fiss09 July 20-24, 2009, Bremen, Germany organized by the FP7 project 4WARD (http://www.4ward-project.eu) ---------------------------------------- Prof. Dr. Carmelita Görg Communication Networks University of Bremen cg at comnets.uni-bremen.de ---------------------------- James Kempf schrieb:
The charter is currently a bit fuzzy. I don't see much value in yet another forum to discuss architecture or other theoretical concerns, except perhaps to keep contact with important academic work in thisarea.If there is any reason at all for an IETF-affiliated group on virtualization, it has to do with interoperability, IMHO. Currently, there is much work going on in GENI on control frameworks for provisioning a virtual aggregate (a network slice and compute resources). AFICT, this work is primarily directed at the US academic institutions and the operators involved are primarily nonprofits (Internet 2 and the nonprofit regionals) due to the US funding model (through NSF). I don't know what is going on in Europe, Japan, or China with respect to prototype frameworks for virtual network control, though I am somewhat familiar with virtualization architectural work in Europe. The danger is that we end up in 5 years time with national or regional control frameworks for virtualized resource allocation that don't properly interoperate. I think the RG should focus on bringing together researchers in different geographic areas to define interoperability between control frameworks, and should include both nonprofit operators and for-profit operators, vendors, and researchers. Ideally, in perhaps a year or two, the issues should be well enough sorted out for an IETF WG to form thatcan standardize an interoperability framework.There may be some other topics that an RG could consider, but I think it would be better to have a specific focus that would serve IETF well.jak-----Original Message-----From: nvrg-bounces at listserv.gwdg.de [mailto:nvrg-bounces at listserv.gwdg.de] On Behalf Of Martin StiemerlingSent: Friday, May 22, 2009 12:34 AM To: nvrg at listserv.gwdg.de Subject: [nvrg-bof] Updated charter proposal 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 UCTRecent 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 listlist'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 DivisionNEC Europe Limited | Registered Office: NEC House, 1 Victoria Road, London W3 6BL | Registered in England 2832014
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