[Teas] Fw: New Version Notification for draft-lin-teas-gmpls-proactive-protection-00.txt

"Linyi (Yi)" <yi.lin@huawei.com> Fri, 24 April 2020 02:32 UTC

From: "Linyi (Yi)" <yi.lin@huawei.com>
To: Matt Hartley <mhartley.ietf@gmail.com>
CC: "teas@ietf.org" <teas@ietf.org>
Thread-Topic: New Version Notification for draft-lin-teas-gmpls-proactive-protection-00.txt
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Date: Fri, 24 Apr 2020 02:32:42 +0000
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Subject: [Teas] Fw: New Version Notification for draft-lin-teas-gmpls-proactive-protection-00.txt
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Hi Matt,

Thank you for your question. Sorry about having not enough time to answer you on line.

If I understand your question correctly, you wander if there is enough time to create the protecting LSP after the failure was predicted and before real failure happens.

Actually we've done a lot of tests, and found that the "failure indication" can be detected at least 500ms ~ several seconds before it becomes a real failure. This time (500ms - 1s) is enough to create the protecting LSP.

This is because:
1) the fiber cable enveloping the fibers can protect them against mechanical stresses. It's very difficult to cut it off within a very short time (e.g., <500ms).
2) some of the parameters of a fiber (e.g., SOP) are very sensitive to the shake of the fiber / fiber cable, even if a digger is just working near the fiber cable without touching it. This makes the early prediction possible.

There are also some other research in the industry which shares very similar conclusions as what we found (please see the example paper we are referring in the slides).



B.R.
Yi LIN

HUAWEI Technologies Co., Ltd.

Address: Huawei Industrial Base
Bantian Longgang
Shenzhen 518129, P.R.China
http://www.huawei.com
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-----邮件原件-----
发件人: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] 
发送时间: 2020年3月9日 20:42
收件人: Bin Yeong Yoon <byyun@etri.re.kr>; Linyi (Yi) <yi.lin@huawei.com>; Bin-Yeong Yoon <byyun@etri.re.kr>
主题: New Version Notification for draft-lin-teas-gmpls-proactive-protection-00.txt


A new version of I-D, draft-lin-teas-gmpls-proactive-protection-00.txt
has been successfully submitted by Yi Lin and posted to the IETF repository.

Name:		draft-lin-teas-gmpls-proactive-protection
Revision:	00
Title:		RSVP-TE Extensions in Support of Proactive Protection
Document date:	2020-03-09
Group:		Individual Submission
Pages:		15
URL:            https://www.ietf.org/internet-drafts/draft-lin-teas-gmpls-proactive-protection-00.txt
Status:         https://datatracker.ietf.org/doc/draft-lin-teas-gmpls-proactive-protection/
Htmlized:       https://tools.ietf.org/html/draft-lin-teas-gmpls-proactive-protection-00
Htmlized:       https://datatracker.ietf.org/doc/html/draft-lin-teas-gmpls-proactive-protection


Abstract:
   This document describes protocol-specific procedures and extensions
   for Generalized Multi-Protocol Label Switching (GMPLS) Resource
   ReSerVation Protocol - Traffic Engineering (RSVP-TE) signaling to
   support Label Switched Path (LSP) Proactive Protection, which create
   the protecting LSP after a failure is predicted and before it
   becomes a real failure.

                                                                                  


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[Teas] Fw: New Version Notification for draft-lin… Linyi (Yi)