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Re: [mpls] Reference Augmented Forwarding - MPLS RAF

Tony Li <tony.li@tony.li> Thu, 28 April 2022 22:23 UTC

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Sender: Tony Li <tony1athome@gmail.com>
From: Tony Li <tony.li@tony.li>
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Date: Thu, 28 Apr 2022 15:23:12 -0700
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Cc: John E Drake <jdrake@juniper.net>, Haoyu Song <haoyu.song@futurewei.com>, mpls <mpls@ietf.org>, Jeff Tantsura <jefftant.ietf@gmail.com>, Kireeti Kompella <kireeti.ietf@gmail.com>, Stewart Bryant <stewart.bryant@gmail.com>, Tarek Saad <tsaad.net@gmail.com>, "zhoutianran@huawei.com" <zhoutianran@huawei.com>
To: Robert Raszuk <rraszuk@gmail.com>
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Subject: Re: [mpls] Reference Augmented Forwarding - MPLS RAF
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Hi Robert,

> Under your proposal, it seems to be required.  
> 
> How did you reach that conclusion ? Is there anywhere in my proposal some text that precludes use of Entropy Label as is today? I would make sure you can make good enough hash instead of doing such mapping as actions. 


I was assuming that you were supporting all of the actions that MNA is planning on supporting.  My bad. What are you supporting?


> Assuming that ECMP is one of our network actions, then we want some entropy label (or similar value) to be considered when forwarding so that we achieve multi-path traffic separation.
> 
> IMO network programming is not really aiming for such usecase(s). 


If our 5G brethren are correct, and carrying a GISS is important, then it seems painful to carry MNA and EL separately.


But the same scaling question exists even if you’re just doing GISS.  Let’s assume that I need 8 slices in my network.  Do I need 8 RSVs?

Tony

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