Re: [spring] WG Last Call for draft-ietf-spring-segment-routing-mpls-06

Hello Uma,

what kind of label depth discussion are you thinking of?

It seems to me this could easily become an endless discussion again. 
People seem to have very different views on it. Thus I'm not sure 
whether it would be suitable for this document.

BTW:

For my needs, bandwidth optimization is one of the major use cases for 
all traffic engineering technologies such as SR or RSVP.

We are currently supporting scientific university research about this, 
and first results give strong confirmation that for bandwidth 
optimization in real world networks you rarely need more than 1 
additional segment. Or rather, the additional efficiency gained by using 
mor than 1 additional segment is very small. We compare a global real 
backbone network with current routing, theoretical MCF optimization and 
realistic optimization with 1 (or 2 or 3) additional traffic engineering 
segments (aka 2-SR, 3-SR, 4-SR).
Thus, from my point of view, an SR optimized network would typically 
have the same label stack depth as a similarily RSVP optimized network 
in some places, and a smaller label stack for the overall average .

All other use-cases I found of serious interest so far all work with 1 
additional segment (i.e. label) at most.

Best regards, Martin

Am 27.01.17 um 20:59 schrieb Uma Chunduri:
> Support.
>
> One quick comment:
>
> While section 3 correctly documents MPLS instantiation of SR -  given the constructs SR has (ADJ SID for example) it's good to document SID/Label depth implications in the deployments.
>
> --
> Uma C.
>
> -----Original Message-----
> From: spring [mailto:spring-bounces@ietf.org] On Behalf Of Martin Vigoureux
> Sent: Friday, January 27, 2017 3:05 AM
> To: spring@ietf.org
> Cc: draft-ietf-spring-segment-routing-mpls@ietf.org
> Subject: [spring] WG Last Call for draft-ietf-spring-segment-routing-mpls-06
>
> Hello Working Group,
>
> This email starts a 2-week Working Group Last Call on
> draft-ietf-spring-segment-routing-mpls-06 [1].
>
> ¤ Please read the document if you haven't read the most recent version yet, and send your comments to the list, no later than the *12th of February*.
> Note that this is *not only* a call for comments on the document; it is also a call for support (or not) to publish this document as a Proposed Standard RFC.
>
> ¤ We have already polled for IPR knowledge on this document and all Authors have replied.
> IPR exists against this document and has been disclosed [2].
>
> Thank you
>
> M&B
>
> ---
> [1] https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing-mpls/
> [2]
> https://datatracker.ietf.org/ipr/search/?submit=draft&id=draft-ietf-spring-segment-routing-mpls
>
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