Re: [Pce] FW: New Version Notification for draft-zhang-pce-pcep-stateful-pce-gmpls-00.txt

Hi,

upon briefly skimming the draft, I would like to suggest splitting 
application-specific extensions into separate drafts.

Especially section 2.6.1 (time-based scheduling) merits its own draft 
because of all the issues one runs into when dealing with distributed 
systems and time. It is obvious that PCC and PCE clocks need to be 
somehow synchronized -- which is a new operational requirement not 
considered in PCEP. I think race windows, security implications and the 
impact of loss of synchronization needs to be described, too.

Bye,
Robert

On 07/09/2012 04:15 AM, Zhangxian (Xian) wrote:
> Hi, Dear PCErs,
>
>     We've just posted a new I-D about PCEP extension for stateful PCE usage in GMPLS networks.
>     
>     You could find the I-D here: http://www.ietf.org/internet-drafts/draft-zhang-pce-pcep-stateful-pce-gmpls-00.txt
>
>     Your feedbacks and comments would be very much appreciated.
>
> Best Regards,
>
> Xian et al.
>
>
> -----邮件原件-----
> 发件人: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org]
> 发送时间: 2012年7月9日 10:00
> 收件人: Zhangxian (Xian)
> 抄送: ogondio@tid.es; ramon.casellas@cttc.es; Leeyoung
> 主题: New Version Notification for draft-zhang-pce-pcep-stateful-pce-gmpls-00.txt
>
>
> A new version of I-D, draft-zhang-pce-pcep-stateful-pce-gmpls-00.txt
> has been successfully submitted by Xian Zhang and posted to the
> IETF repository.
>
> Filename:	 draft-zhang-pce-pcep-stateful-pce-gmpls
> Revision:	 00
> Title:		 Path Computation Element (PCE) Protocol Extension for Stateful PCE Usage in GMPLS Networks
> Creation date:	 2012-07-07
> WG ID:		 Individual Submission
> Number of pages: 15
> URL:             http://www.ietf.org/internet-drafts/draft-zhang-pce-pcep-stateful-pce-gmpls-00.txt
> Status:          http://datatracker.ietf.org/doc/draft-zhang-pce-pcep-stateful-pce-gmpls
> Htmlized:        http://tools.ietf.org/html/draft-zhang-pce-pcep-stateful-pce-gmpls-00
>
>
> Abstract:
>     The Path Computation Element (PCE) facilitates Traffic Engineering
>     (TE) based path calculation in large, multi-domain, multi-region, or
>     multi-layer networks. PCE can be stateless or stateful. With the LSP
>     state information acquired from the network, a stateful PCE exhibits
>     superiority in facilitating a wide variety of applications,
>     especially in GMPLS networks, such as impairment-aware routing and
>     wavelength assignment in wavelength-switched optical networks (WSON),
>     time-based scheduling applications. This memo provides extensions
>     required for PCE communication protocol (i.e. PCEP) so as to enable
>     the usage of a stateful PCE capability in GMPLS networks. To be more
>     specific, the PCEP extensions specified in this memo include not
>     only new objects but also modification of existing objects in PCEP
>     messages, with regard to stateful PCE usage in GMPLS networks.
>
>
>                                                                                    
>
>
> The IETF Secretariat
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