[mpls] Re: Fwd: New Version Notification for draft-li-mpls-mna-entropy-03.txt

[Stewart Bryant <[e-mail]>]

Hi Tony

I am struggling to see whether this has a sufficient advantage over the existing EL/ELI mechanism to justify us recommending it existence.

It is obvious that this can be done, and it saves an LSE, but is that sufficient justification for the complexity introduced by having two mechanisms that of necessity need to co-exist?

We also need to understand what happens in a legacy routers that are looking for EL/ELI and older routers that just hash the stack. I think they just provide less (no?) entropy. 

I imagine this ends with routers needing to parse for both types of entropy which is not a great position to be in.

Best regards

Stewart 

> On 30 Aug 2024, at 5:26 PM, Tony Li <[e-mail]> wrote:
> [WG chair hat: off]
> 
> Hi,
> 
> This update addresses comments from Adrian Farrel as part of the WG adoption process.
> 
> Comments and corrections are most welcome.
> 
> Thanks,
> Tony
> 
> 
>> Begin forwarded message:
>> 
>> From: "internet-drafts at ietf.org" <[e-mail]>
>> Subject: New Version Notification for draft-li-mpls-mna-entropy-03.txt
>> Date: August 30, 2024 at 9:24:05 AM PDT
>> To: "John Drake" <[e-mail]>, "Tony Li" <[e-mail]>
>> Reply-To: [e-mail]
>> 
>> A new version of Internet-Draft draft-li-mpls-mna-entropy-03.txt has been
>> successfully submitted by Tony Li and posted to the
>> IETF repository.
>> 
>> Name:     draft-li-mpls-mna-entropy
>> Revision: 03
>> Title:    MPLS Network Action for Entropy
>> Date:     2024-08-28
>> Group:    Individual Submission
>> Pages:    5
>> URL:      https://www.ietf.org/archive/id/draft-li-mpls-mna-entropy-03.txt
>> Status:   https://datatracker.ietf.org/doc/draft-li-mpls-mna-entropy/
>> HTMLized: https://datatracker.ietf.org/doc/html/draft-li-mpls-mna-entropy
>> Diff:     https://author-tools.ietf.org/iddiff?url2=draft-li-mpls-mna-entropy-03
>> 
>> Abstract:
>> 
>>   Load balancing is a powerful tool for engineering traffic across a
>>   network and has been successfully used in MPLS as described in RFC
>>   6790, "The Use of Entropy Labels in MPLS Forwarding".  With the
>>   emergence of MPLS Network Actions (MNA), there is signficant benefit
>>   in being able to invoke the same load balancing capabilities within
>>   the more general MNA infrastructure.
>> 
>>   This document describes a network action for entropy to be used in
>>   conjunction with "MPLS Network Action (MNA) Sub-Stack Solution".
>> 
>> 
>> 
>> The IETF Secretariat
> 
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