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: [email protected] [mailto:[email protected]]
发送时间: 2012年7月9日 10:00
收件人: Zhangxian (Xian)
抄送: [email protected]; [email protected]; 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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