Re: [Teas] WG adoption poll - draft-dong-teas-enhanced-vpn-03

Hi,

Comments inline

Yours Irrespectively,

John

From: Andrew G. Malis <agmalis@gmail.com>
Sent: Wednesday, December 19, 2018 12:51 PM
To: John E Drake <jdrake@juniper.net>
Cc: EXT-vishnupavan@gmail.com <vishnupavan@gmail.com>; TEAS WG Chairs <teas-chairs@ietf.org>; teas@ietf.org
Subject: Re: [Teas] WG adoption poll - draft-dong-teas-enhanced-vpn-03

John,

Did you read the text in section 1 and elsewhere in the draft? Specifically, the draft says "The general concept of network slicing in a TE network is a larger  problem space than is addressed by VPN+ or VN, but those concepts are tools to address some aspects or realizations of network slicing." My comment was that is an approach for slicing, but I didn't claim that it's a total solution.

[JD]  My point was that network slicing may be a solvable problem but allocating network resources per-VPN is not.
As far as scalability goes, see the discussion in section 5 regarding the scalability benefits of using an approach based on SR.

[JD]  Right, provisioning O(10**5) SIDs on each router in a network should work just fine..

Once this becomes a WG draft, you're welcome to propose new text to address any particular concerns you have with the current text.

[JD]  Thanks, that’s most generous!  How about:  It is widely understood that allocating network resources per-VPN is an intractable problem.  However, this draft addresses this issue
through the innovative use of an emerging technology known as ‘willing suspension of disbelief’.  It should also be noted that this draft eliminates statistical multiplexing which has
always been considered nettlesome.

Cheers,
Andy

On Wed, Dec 19, 2018 at 11:46 AM John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>> wrote:
Andy,

Network slicing is very different from what is described in this draft.  Network slicing envisions a small number of logical networks built using the same physical network, each of which is designed for a specific type of overlay network and a given VPN, depending upon its requirements, would be assigned to one or more of these network slices.  This draft, in contrast, is describing assignment of resources from the physical network to individual VPNs.

This is clearly absurd, and its characterization as a ‘scalable approach’ seems ill-considered.

This draft is also not a framework draft in any of the normally used definitions of that word (https://www.merriam-webster.com/dictionary/framework<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.merriam-2Dwebster.com_dictionary_framework&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=CRB2tJiQePk0cT-h5LGhEWH-s_xXXup3HzvBSMRj5VE&m=tx8VLwW48E24vAXzFHxga-Sln5NMNbiAgGUM1QslKvo&s=ISagHC0UOewkaxFSUV8HXurslTvq4C2S_G0IjNIKUiY&e=>).  Rather, I would characterize it as a set of semi-random musings.

Yours Irrespectively,

John

From: Teas <teas-bounces@ietf.org<mailto:teas-bounces@ietf.org>> On Behalf Of Andrew G. Malis
Sent: Tuesday, December 18, 2018 9:38 AM
To: EXT-vishnupavan@gmail.com<mailto:EXT-vishnupavan@gmail.com> <vishnupavan@gmail.com<mailto:vishnupavan@gmail.com>>
Cc: TEAS WG Chairs <teas-chairs@ietf.org<mailto:teas-chairs@ietf.org>>; teas@ietf.org<mailto:teas@ietf.org>
Subject: Re: [Teas] WG adoption poll - draft-dong-teas-enhanced-vpn-03

Yes/support. This is a scalable approach for network slicing and enhanced VPNs that builds on a body of existing work.

Cheers,
Andy

On Mon, Dec 17, 2018 at 2:27 AM Vishnu Pavan Beeram <vishnupavan@gmail.com<mailto:vishnupavan@gmail.com>> wrote:
All,

This is start of a *three* week poll on making
draft-dong-teas-enhanced-vpn a TEAS working group document.
Please send email to the list indicating "yes/support" or "no/do not
support". If indicating no, please state your reservations with the
document. If yes, please also feel free to provide comments you'd
like to see addressed once the document is a WG document.

The poll ends Jan 7th 2019 (extra week to account for the holidays).

Thanks,
Pavan and Lou
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