Subject: Re: [nvrg-bof] Updated charter proposal
From: "C. Görg" <[email-masked]>
To: James Kempf <[email-masked]>
Cc: [email-masked], Martin Stiemerling <[email-masked]>
Date: Sun, 31 May 2009 20:37:02 +0200
List-Id: Discussion list for the proposal of a Network Virtualization RG <nvrg.listserv.gwdg.de>

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
[email-masked]
----------------------------

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 this
> area. 
> 
> 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 that
> can 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: [email-masked] 
>> [mailto:[email-masked]] On Behalf Of Martin Stiemerling
>> Sent: Friday, May 22, 2009 12:34 AM
>> To: [email-masked]
>> 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 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: [email-masked]
>> signing up: https://listserv.gwdg.de/mailman/listinfo/nvrg
>>
>>
>>
>>
>> [email-masked]
>>
>> NEC Laboratories Europe - Network Research Division
>> NEC Europe Limited | Registered Office: NEC House, 1 Victoria 
>> Road, London W3 6BL | Registered in England 2832014 
>>
>>
> 

Content-class: urn:content-classes:message
Date: Thu, 28 May 2009 01:13:11 +0200
From: "PAPADIMITRIOU Dimitri" <[email-masked]>
To: "Martin Stiemerling" <[email-masked]>, <[email-masked]>
Subject: Re: [nvrg-bof] Updated charter proposal

Martin, all,=20

> -----Original Message-----
> From: [email-masked]=20
> [mailto:[email-masked]] On Behalf Of Martin Stiemerling
> Sent: Tuesday, May 26, 2009 11:01 AM
> To: [email-masked]
> Subject: Re: [nvrg-bof] Updated charter proposal
>=20
> I assume that no answer to this can mean:
> - it is all just fine (what I don't believe)
> - it so bad, not worth talking about it (hopefully not)
> - people have lost interest in the NVRG.

Two base comments:

o) "research challenges" should include a specific work item on a
"problem statement/observations" vs "needs" e.g. why are the intended
functionality not resolvable with the current Internet/where are the
limitations ?/etc. Such effort would be allow to identify more clearly
the architectural and design goals (if the approach is inductive
documenting set of representative use cases can be considered).

o) the "Identifying architectural challenges resulting from virtual
networks" is the only research topic, the others are either statements
(i) or sub-components of one possible design (ii) or bottom-level
implementation issues (by the way which issues are foreseen beside
interop ?). Henceforth, I suggest to detail the list of research points.

> So let me know your comments and general opinion!

More here below:

> > Draft charter for the Virtual Networks Research Group VNRG) proposal
> >=20
> > VERSION: 2009-05-22 0800 UCT
> >=20
> > Recent developments in networking are aiming at better utilizing
> > infrastructure
> > in terms of reusing a single physical or logical resource=20
> for multiple
> > other
> > network instances, or to aggregate multiple these resources=20
> > to obtain more "functionality".=20

Which "functionality" ? =20

> > These resource can be network components,=20
> 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=20
> virtual network to
> > all
> > others. Each resource can be sliced so that it can be part=20
> of multiple
> > Virtual Networks, but on the other hand does virtualization=20
> guarentee
> > the
> > clear separation of each network, so that actions in one=20
> network do not
> > affect
> > the operation of any other network.

It would be interesting to discuss/address issue of how a given set
resource units can be shared and dedicated during the same time interval
? from the above, after "aggregation", resources units can be shared
over longer period of time but units are dedicated during shorter
execution time (to ensure "separation"). Overall this raise the question
of resource usage efficiency. Is this more efficient than current
situation ? =20

> > 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=20
> deployment of
> > single technologies in parts of the Internet or other IP-based
> > networks, but lacks a common understanding of what=20
> virtualized networks
> > is causing to IP-based networks, or how Virtual Networks is applied
> > in favorable way.  This leads to the introduction of=20
> virtualization in
> > an
> > uncoordinated way between the various players, such as network
> > operators,
> > vendors, service providers and testbed providers (e.g.=20
> GENI, FEDERICA,
> > etc)
> > without considerations about the overall impact on the system level.

To which system this last statement refers to ?

> > 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=20
> Interent and
> > also beyond the current Internet.

It is probably advisable to state "in the context of the Internet and
its evolution" instead of "in the context of the=20
Internet and also beyond the current Internet".

> > The RG works on a set of principles of virtual networks=20
> 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=20
> a service or
> > whatever) referring to the decoupling from the physical=20
> resource, i.e.,
> > the abstraction is not bound to a single resource but can=20
> be relocated
> > but is a logical structure. Virtualization also offers=20
> recursion, i.e.,
> > an
> > already virtualized network can again include virtual networks.
> >=20
> >=20
> > The group will address the following research challenges:
> > - Consider a whole system for virtualized networks and not=20
> only single
> >   components or a limited set of components;
> > - Identifying architectural challenges resulting from=20
> virtual networks;
> > - Recursive network management of virtual networks;
> > - Emerging technological and implementation issues.

I already commented on these here above.

Thanks,
-dimitri.
=20
> > Web site: http://user.informatik.uni-goettingen.de/~stiemer/nvrg/
> >=20
> > Mailing list:  Open mailing list to anybody, just needs signing up
> > with the list
> > list's address: [email-masked]
> > signing up: https://listserv.gwdg.de/mailman/listinfo/nvrg
> >=20
> >=20
> >=20
> >=20
> > [email-masked]
> >=20
> > NEC Laboratories Europe - Network Research Division
> > NEC Europe Limited | Registered Office: NEC House, 1 Victoria Road,
> > London W3 6BL | Registered in England 2832014
>=20
>=20

Date: Wed, 27 May 2009 18:19:59 +0200
From: Xavier Hesselbach Serra <[email-masked]>
To: Martin Stiemerling <[email-masked]>
Cc: [email-masked]
Subject: Re: [nvrg-bof] Updated charter proposal

Content-class: urn:content-classes:message
Date: Tue, 26 May 2009 13:03:04 -0500
From: "James Kempf" <[email-masked]>
To: "Martin Stiemerling" <[email-masked]>, <[email-masked]>
Subject: Re: [nvrg-bof] Updated charter proposal

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 this
area.=20

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 that
can standardize an interoperability framework.=20

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 =20

> -----Original Message-----
> From: [email-masked]=20
> [mailto:[email-masked]] On Behalf Of Martin Stiemerling
> Sent: Friday, May 22, 2009 12:34 AM
> To: [email-masked]
> Subject: [nvrg-bof] Updated charter proposal
>=20
> Hi all,
>=20
> Here is the updated charter proposal. Let me know your comments.
>=20
>   Martin
>=20
> Draft charter for the Virtual Networks Research Group VNRG) proposal
>=20
> VERSION: 2009-05-22 0800 UCT
>=20
> Recent developments in networking are aiming at better=20
> utilizing infrastructure in terms of reusing a single=20
> physical or logical resource for multiple other network=20
> instances, or to aggregate multiple these resources to obtain=20
> more "functionality". These resource can be network=20
> components, such as, for example, routers, switches or hosts,=20
> and also services, such as, for example, name mapping=20
> systems. Typically, this is referred to as Virtual Networks,=20
> where a resource is either re-used for multiple networks or=20
> multiple resources are aggregated for virtual resource.
> Important properties of Virtual Networks are i) the level of=20
> participation of each resource and ii) the clear separation=20
> of any virtual network to all others. Each resource can be=20
> sliced so that it can be part of multiple Virtual Networks,=20
> but on the other hand does virtualization guarentee the clear=20
> separation of each network, so that actions in one network do=20
> not affect the operation of any other network.=20
>=20
> However, in the network community, Virtual Networks is a very=20
> broad term, ranging from running multiple wave lengths over a=20
> fiber, MPLS, virtual routers, to overlay systems. This leads=20
> to deployment of single technologies in parts of the Internet=20
> or other IP-based networks, but lacks a common understanding=20
> of what virtualized networks is causing to IP-based networks,=20
> or how Virtual Networks is applied in favorable way.  This=20
> leads to the introduction of virtualization in an=20
> uncoordinated way between the various players, such as=20
> network operators, vendors, service providers and testbed=20
> providers (e.g. GENI, FEDERICA, etc) without considerations=20
> about the overall impact on the system level.=20
>=20
> The Virtual Networks Research Group (VNRG)  provides a forum=20
> for interchange of ideas among a group of network researchers=20
> with an interest in network virtualization in the context of=20
> the Interent and also beyond the current Internet.
>=20
> The RG works on a set of principles of virtual networks that=20
> a single physical resource can be re-used by multiple=20
> entities with a clear separation between the actions taken by=20
> the single entities. Virtualization delivers an abstraction=20
> to the user (i.e., not necessarily a human but a service or
> whatever) referring to the decoupling from the physical=20
> resource, i.e., the abstraction is not bound to a single=20
> resource but can be relocated but is a logical structure.=20
> Virtualization also offers recursion, i.e., an already=20
> virtualized network can again include virtual networks.
>=20
>=20
> 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=20
> networks; =20
> - Recursive network management of virtual networks;
> - Emerging technological and implementation issues.
>=20
>=20
> Web site: http://user.informatik.uni-goettingen.de/~stiemer/nvrg/
>=20
> Mailing list:  Open mailing list to anybody, just needs signing up =20
> with the list
> list's address: [email-masked]
> signing up: https://listserv.gwdg.de/mailman/listinfo/nvrg
>=20
>=20
>=20
>=20
> [email-masked]
>=20
> NEC Laboratories Europe - Network Research Division
> NEC Europe Limited | Registered Office: NEC House, 1 Victoria=20
> Road, London W3 6BL | Registered in England 2832014=20
>=20
>=20

From: Katsushi Kobayashi <[email-masked]>
To: Martin Stiemerling <[email-masked]>
Date: Tue, 26 May 2009 18:40:11 +0900
Cc: [email-masked]
Subject: Re: [nvrg-bof] Updated charter proposal

Hi,

I think the charter draft is fine. A minor comment is the followings:

l.4.
........... These resource can be network components, such as, for
example, routers, switches or hosts, and also services, such as, for  
example,
name mapping systems. .....

In the above, there is no "circuit" and "link" technology in the network
component type enumeration. I think it should be add, if it can be  
consists
of virtualized network.

On 2009/05/26, at 18:00, Martin Stiemerling wrote:

> I assume that no answer to this can mean:
> - it is all just fine (what I don't believe)
> - it so bad, not worth talking about it (hopefully not)
> - people have lost interest in the NVRG.
>
> So let me know your comments and general opinion!
>
>  Martin
>
> [email-masked]
>
> NEC Laboratories Europe - Network Research Division
> NEC Europe Limited | Registered Office: NEC House, 1 Victoria Road,  
> London W3 6BL | Registered in England 2832014
>
>> -----Original Message-----
>> From: [email-masked] [mailto:nvrg-
>> [email-masked]] On Behalf Of Martin Stiemerling
>> Sent: Friday, May 22, 2009 9:34 AM
>> To: [email-masked]
>> 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 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: [email-masked]
>> signing up: https://listserv.gwdg.de/mailman/listinfo/nvrg
>>
>>
>>
>>
>> [email-masked]
>>
>> NEC Laboratories Europe - Network Research Division
>> NEC Europe Limited | Registered Office: NEC House, 1 Victoria Road,
>> London W3 6BL | Registered in England 2832014
>

Content-class: urn:content-classes:message
Date: Tue, 26 May 2009 11:00:30 +0200
From: "Martin Stiemerling" <[email-masked]>
To: <[email-masked]>
Subject: Re: [nvrg-bof] Updated charter proposal

I assume that no answer to this can mean:
- it is all just fine (what I don't believe)
- it so bad, not worth talking about it (hopefully not)
- people have lost interest in the NVRG.

So let me know your comments and general opinion!

  Martin

[email-masked]

NEC Laboratories Europe - Network Research Division
NEC Europe Limited | Registered Office: NEC House, 1 Victoria Road, =
London W3 6BL | Registered in England 2832014=20

> -----Original Message-----
> From: [email-masked] [mailto:nvrg-
> [email-masked]] On Behalf Of Martin Stiemerling
> Sent: Friday, May 22, 2009 9:34 AM
> To: [email-masked]
> Subject: [nvrg-bof] Updated charter proposal
>=20
> Hi all,
>=20
> Here is the updated charter proposal. Let me know your comments.
>=20
>   Martin
>=20
> Draft charter for the Virtual Networks Research Group VNRG) proposal
>=20
> VERSION: 2009-05-22 0800 UCT
>=20
> 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.
>=20
> 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.
>=20
> 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.
>=20
> 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.
>=20
>=20
> 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.
>=20
>=20
> Web site: http://user.informatik.uni-goettingen.de/~stiemer/nvrg/
>=20
> Mailing list:  Open mailing list to anybody, just needs signing up
> with the list
> list's address: [email-masked]
> signing up: https://listserv.gwdg.de/mailman/listinfo/nvrg
>=20
>=20
>=20
>=20
> [email-masked]
>=20
> NEC Laboratories Europe - Network Research Division
> NEC Europe Limited | Registered Office: NEC House, 1 Victoria Road,
> London W3 6BL | Registered in England 2832014

Content-class: urn:content-classes:message
Date: Fri, 22 May 2009 09:34:06 +0200
From: "Martin Stiemerling" <[email-masked]>
To: <[email-masked]>
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 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=20
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.=20

However, in the network community, Virtual Networks is a very =20
broad term, ranging from running multiple wave lengths over a fiber, =20
MPLS, virtual routers, to overlay systems. This leads to deployment of =20
single technologies in parts of the Internet or other IP-based =20
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.=20

The Virtual Networks Research Group (VNRG)  provides a forum for =20
interchange of ideas among a group of network researchers with an =20
interest in network virtualization in the context of the Interent and =20
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.,=20
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 =20
with the list
list's address: [email-masked]
signing up: https://listserv.gwdg.de/mailman/listinfo/nvrg

[email-masked]

NEC Laboratories Europe - Network Research Division
NEC Europe Limited | Registered Office: NEC House, 1 Victoria Road, =
London W3 6BL | Registered in England 2832014=20