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Re: [CCAMP] Question on LSP diversity

Lou Berger <lberger@labn.net> Thu, 06 March 2014 15:03 UTC

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Date: Thu, 06 Mar 2014 15:02:47 +0000
From: Lou Berger <lberger@labn.net>
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To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>, "Matt Hartley (mhartley)" <mhartley@cisco.com>, "CCAMP (ccamp@ietf.org)" <ccamp@ietf.org>
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Archived-At: http://mailarchive.ietf.org/arch/msg/ccamp/jnOtxvCsDxpric4R5l8Oa_2vYOQ
Subject: Re: [CCAMP] Question on LSP diversity
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I believe Matt is referring to a comment that I made in response to a 
question.  The question was something like, if we need a protocol to 
coordinate information (call it a "cookie") between nodes, *must* it be 
specified as part of the solution.  My response was no, "it is out of 
scope of ccamp".  To be more precise, it is not required to be part of 
the solution and may use currently available mechanisms, e.g., something 
from PCE or network management.  "out of scope" is actually too extreme 
as it implies that if some wanted to propose a solution for such 
coordination in ccamp that we would not allow it to be discussed -- 
which is *not* the case.  We'd look at it just like any other 
contribution to the WG.

Lou

On 3/6/2014 2:42 PM, Daniele Ceccarelli wrote:
> Hi Matt,
>
> I don’t recall such decision, but I trust you if you say that it was made.
>
> In that case I have to support Gert then J
>
> Cheers
>
> Danieele
>
> *From:*Matt Hartley (mhartley) [mailto:mhartley@cisco.com]
> *Sent:* giovedì 6 marzo 2014 13:50
> *To:* Daniele Ceccarelli; CCAMP (ccamp@ietf.org)
> *Cc:* Matt Hartley (mhartley)
> *Subject:* RE: Question on LSP diversity
>
> Daniele,
>
> ISTR Gert asked about this on Tuesday, and the reply was that this is
> outside the scope of CCAMP and therefore of the work being proposed here.
>
> I’m sure someone will correct me if I’m wrong about that :)
>
> Cheers
>
> Matt
>
> *From:*CCAMP [mailto:ccamp-bounces@ietf.org] *On Behalf Of *Daniele
> Ceccarelli
> *Sent:* Thursday, March 06, 2014 6:36 AM
> *To:* CCAMP (ccamp@ietf.org <mailto:ccamp@ietf.org>)
> *Subject:* [CCAMP] Question on LSP diversity
>
> Hi,
>
> bringing this to the list due to time constraints.
>
> We said we have 4 use cases for LSP diversity:
>
> -1. Single homing
>
> -2. Dual homing
>
> -3. LSPs with different edge and core nodes
>
> -4. Multi domain
>
> In cases 3 and 4 there is the need for “coordination” between edge
> nodes. Is such coordination in CCAMP scope or we assume that “somehow”
> the two edge nodes exchange such piece of info (e.g. NMS, the triangle
> with the eye, or whatever)?
>
> BR
> Daniele
>
>
>
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