[mpls] question on draft-cui-mpls-tp-mfp-use-case-and-requirements

Loa Andersson <loa@pi.nu> Sat, 26 July 2014 12:28 UTC

Message-ID: <53D39F0D.6050209@pi.nu>
Date: Sat, 26 Jul 2014 14:29:01 +0200
From: Loa Andersson <loa@pi.nu>
User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0
MIME-Version: 1.0
To: draft-cui-mpls-tp-mfp-use-case-and-requirements@tools.ietf.org, "mpls@ietf.org" <mpls@ietf.org>, c-sai@bx.jp.nec.com
Content-Type: text/plain; charset="ISO-8859-1"; format="flowed"
Content-Transfer-Encoding: 7bit
Archived-At: http://mailarchive.ietf.org/arch/msg/mpls/qyQTY7WQVWjs3wfnTn4PCe8UMEQ
Subject: [mpls] question on draft-cui-mpls-tp-mfp-use-case-and-requirements
Precedence: list

Zhenlong,

draft-cui-mpls-tp-mfp-use-case-and-requirements in the mpls wg
yesterday. I had a question that was not very clear, I try to repeat it
here.

In slide 3 you say hat that:


"In the m:n architecture, the m backup paths(p1,p2)
  are sharing backup resource for n working paths, as
  shown in the following example(modeling)."

In slide 5 you say:

" The m backup paths should be sharing backup
   resource for n working paths, where n>=m."

It is not entirely clear if you say that n being a lower number is an
cost optimization or if it is part of the architecture.

 From a strictly architectural could n be lower, equal or higher than m,
i.e. you can protect m working paths with m+x protecting paths. Where
x can be any positive or negative number (as long as it give you at
least some resources for protection).

/Loa



-- 


Loa Andersson                        email: loa@mail01.huawei.com
Senior MPLS Expert                          loa@pi.nu
Huawei Technologies (consultant)     phone: +46 739 81 21 64

[mpls] question on draft-cui-mpls-tp-mfp-use-case… Loa Andersson
Re: [mpls] question on draft-cui-mpls-tp-mfp-use-… Zhenlong Cui