Re: [Teas] Status update on <draft-ietf-teas-pce-central-control>

"Doolan, Paul (Coriant - US/Irving)" <paul.doolan@coriant.com> Fri, 24 March 2017 16:38 UTC

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From: "Doolan, Paul (Coriant - US/Irving)" <paul.doolan@coriant.com>
To: Igor Bryskin <Igor.Bryskin@huawei.com>, Dieter Beller <Dieter.Beller@nokia.com>, "Scharf, Michael (Nokia - DE/Stuttgart)" <michael.scharf@nokia.com>, Lou Berger <lberger@labn.net>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>, "teas@ietf.org" <teas@ietf.org>
Thread-Topic: [Teas] Status update on <draft-ietf-teas-pce-central-control>
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Date: Fri, 24 Mar 2017 16:38:28 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/teas/C2AYBlE7dCVCnw8NjZufxghmh5o>
Subject: Re: [Teas] Status update on <draft-ietf-teas-pce-central-control>
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Hi Dieter,


you might want to start by Googling "huawei gmpls interoperability". Just a thought.


cheers,

pd


________________________________
From: Teas <teas-bounces@ietf.org> on behalf of Igor Bryskin <Igor.Bryskin@huawei.com>
Sent: Friday, March 24, 2017 10:12 AM
To: Dieter Beller; Scharf, Michael (Nokia - DE/Stuttgart); Lou Berger; adrian@olddog.co.uk; teas@ietf.org
Subject: Re: [Teas] Status update on <draft-ietf-teas-pce-central-control>


Dieter,



Note that I said “realistically speaking”.

To be meaningful your email should contain examples of deployed multi-vendor (3 or more vendor) solutions interoping via GMPLS, as well GMPLS interoperability test events (rather than demos) starting from the most recent one.



Cheers,

Igor



From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Dieter Beller
Sent: Friday, March 24, 2017 9:55 AM
To: Igor Bryskin; Scharf, Michael (Nokia - DE/Stuttgart); Lou Berger; adrian@olddog.co.uk; teas@ietf.org
Subject: Re: [Teas] Status update on <draft-ietf-teas-pce-central-control>



Hi Igor, all,

stating that GMPLS is "uninteroperable" is not correct! GMPLS interoperability across vendor domains has been demonstrated
multiple times with different participating vendors.


Thanks,
Dieter

On 24.03.2017 14:33, Igor Bryskin wrote:

Thanks Michael,



I have similar concerns. If there is a need for proprietary PCEP extensions to accommodate vendor specific semantics, how we will not end up with the same issues that have made GMPLS RSVP-TE/OSPF-TE, realistically speaking, uninteroperable? In other words, would you agree that applied to circuit switched technologies, PCEP has exact same probability for interoperability success as GMPLS? Note that for IP/MPLS networks there is no (or at least much less) potential PCEP interop problems, but IP/MPLS control plane has proved to be interoperable as well.



Igor



-----Original Message-----

From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Scharf, Michael (Nokia - DE/Stuttgart)

Sent: Friday, March 24, 2017 6:32 AM

To: Lou Berger; adrian@olddog.co.uk<mailto:adrian@olddog.co.uk>; teas@ietf.org<mailto:teas@ietf.org>

Subject: Re: [Teas] Status update on <draft-ietf-teas-pce-central-control>



We have already discussed "lively" the speculative statements in certain sections of this document.



To me, examples such as section 3.1.4 (and others) ...



   It may be the case that additional technology-

   specific parameters are needed to configure the NEs and these

   parameters will need to be carried in the PCEP messages



... continue to somehow contradict the expectation in Section 4 that extensions will be generic:



   The only work expected to be needed is small extensions

   to carry additional or specific information elements for the

   individual use cases.  Where possible, consistent with the general

   principles of how protocols are extended, any additions to the

   protocol should be made in a generic way such that they are open to

   use in a range of applications.



Having said this, maybe one could add some thoughts on increased PCEP protocol complexity (e.g., would it possible that the small PCEP extensions would require transaction and rollback support?), impact on running PCEP code, as well as implications on interoperability testing between implementations? This might partly be speculation, but manageability impact doesn't seem entirely unrealistic for some of the use cases considered in the document.



Thanks



Michael





-----Original Message-----

From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Lou Berger

Sent: Mittwoch, 22. März 2017 20:19

To: adrian@olddog.co.uk<mailto:adrian@olddog.co.uk>; teas@ietf.org<mailto:teas@ietf.org>

Subject: Re: [Teas] Status update on <draft-ietf-teas-pce-central-control>



WG,



    This is the 2nd (or 3rd) time the authors are stating that the document is

ready to LC  since it was adopted ~6months ago - without there being any

substantive discussion on the document within the WG and only a minor

update in December.  It's a little hard for us (chairs) to know if silence is due

to complete agreement with the document or simply apathy.  From the

message below, the authors clearly think it's the former.  If you are *not* an

author of this document and are willing to share your opinion on this

document, please do so -- preferably on the list, but unicast to the chairs is

also acceptable.  We will also ask for feedback on the draft during the status

portion of the meeting.



Thank you,



Lou (and Pavan)





On 3/22/2017 8:01 AM, Adrian Farrel wrote:

Hi,



As requested, here is the status of this I-D.



- Not on the agenda in Chicago



- New revision posted in December

   - Fixed nits after re-review by several authors



- The authors have repeatedly pointed out to the chairs that the

   document is complete and ready to move forward.

   - At this stage, the chairs are blocking progress



- Related work...

   - Use cases document has been adopted in TEAS

      draft-ietf-teas-pcecc-use-cases



Adrian





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