Dear Pedro,Thanks for your comments. See inline, please.
Regards, Sangjin
-----Original Message----- From: "Pedro Andr?s Aranda Guti?rrez" <paag at tid.es> From Date: 2010-04-30 PM 2:27:16 To: "Sangjin Jeong" <sjjeong at etri.re.kr>, "vnrg at irtf.org" <vnrg at irtf.org> Cc: Subject: Re: [vnrg] FW: I-D Action:draft-shin-virtualization-meta-arch-01.txt
Dear all, I'd first of alllike to thank all the writers of the draft. We now have a document to work upon! My main comment is that the document is written as if current VPN technologies didn't exist and, IMvHO, this was confusing to me. This is very much so (I fear) in the last paragraph before [3].
Network virtualization has three typical characteristics, isolation, partitioning, and aggregation. Although the current virtual network technologies, for example VPNs support partitioning and isolation capabilities, the supported capabilities are not complete and may need more improvement. Similarly, there are other technologies that support some of network virtualization characteristics, but these technologies are not complete from the view point of network virtualization definition. The section 2 describes the possible problems of network architecture.
Another point is that there is a whole research topic which is not touched upon: domains and interdomain problems. The document very much follows the tradition of assuming planet-wide 'magic' availability of virtualisation. But this will not be like this. We will find providers making this happen and if we have to plan for several of them interacting in some cooperative/competitive environment. Rationalisation will finally show that sharing footprints is better in some situations that complete green-field deployment. This can only happen with a sound interdomain interface.
I agree with you that considering intra-domain or inter-domain interaction is important problems to be investigated. However, federation seems not within the initial scope of RG, so we did not touch federation issues in the current document. If there is a consensus for investigating federation issues in this document, we will try to do it. However, IMHO, federation is a quite large research area and may need a separate document to work on.
I'd kindly ask to add this consideration to the I-D. Kind regards, /PA PS: I'm attaching a diff file with some language corrections, as well as some marks of points I think need more discussion to find a more accurate wording.
We will reflect the diff file in the next version. I appreciate it.
Sangjin Jeong escribi?: > Hello folks, > > During the Anaheim meeting, it was agreed that "Network Virtualization Problem Statement" document was a good starting point, but more work needs to be done in order to cover various aspects. So, as a follow-up of the meeting. we would like to start discussion about the document. Please find the document in the link below. > > This document investigates problem spaces and requirements for supporting network virtualization. We have received several comments offline, but we are soliciting more comments. > > Any comments are appreciated. > > Regards, > Sangjin > -----Original Message----- From: "Internet-Drafts at ietf.org" <Internet-Drafts at ietf.org> From Date: 2010-03-04 PM 11:45:01 To: "i-d-announce at ietf.org" <i-d-announce at ietf.org> Cc: Subject: I-D Action:draft-shin-virtualization-meta-arch-01.txtA New Internet-Draft is available from the on-line Internet-Drafts directories. Title : Network Virtualization Problem Statement Author(s) : S. Jeong, et al. Filename : draft-shin-virtualization-meta-arch-01.txt Pages : 9 Date : 2010-03-04 This document analyzes and discusses the problem space of supporting network virtualization in the networks. Furthermore, some key requirements for enabling network virtualization in the networks are investigated and described. A URL for this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-shin-virtualization-meta-arch-01.txt Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ Below is the data which will enable a MIME compliant mail reader implementation to automatically retrieve the ASCII version of the Internet-Draft.
--Pedro A. Aranda Guti?rrez Telef?nica I+D Technology Specialist New Network Technologies mailto: paag at tid.es C/Emilio Vargas,6 Tlf: +34-913 374 702 E-28043 Madrid "Fragen sind nicht da, um beantwortet zu werden. Fragen sind da, um gestellt zu werden" Georg Kreisler http://www.mendeley.com/profiles/pedro-a-aranda-gutierrez
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