+1

As commented on the mike at the WG meeting, SRm6 being a *mapping* technique 
(that allocates IDs, distributes its state as IDs, and whose FIB is based these 
IDs and in which does ID swapping in the forwarding path), it is more 
appropriate to understand the genuine benefits of SRm6 over SR-MPLS IPv6 
solutions. After all SR-MPLS was designed as a label mapping based source 
routing solution for both IPv4 and IPv6 control planes by the WG.

Thanks,
Ketan

From: spring <[email protected]> On Behalf Of Robert Raszuk
Sent: 19 November 2019 04:53
To: Ron Bonica <[email protected]>
Cc: [email protected]; SPRING WG <[email protected]>; Darren 
Dukes (ddukes) <[email protected]>
Subject: Re: [spring] SRm6: Motivation?

Hello Ron,

In your generous offer would you mind to also include in your document not only 
advantages of SRm6 over SRv6 but also compare it with the below parallel 
solutions:

https://tools.ietf.org/html/draft-filsfils-spring-sr-mpls-ipv6-control-plane-00

https://tools.ietf.org/html/draft-agrawal-spring-srv6-mpls-interworking-00

and

https://tools.ietf.org/html/draft-raszuk-teas-ip-te-np-00

Kindest regards,
Robert.



On Mon, Nov 18, 2019 at 9:24 PM Ron Bonica 
<[email protected]<mailto:[email protected]>> 
wrote:
Hi Darren,

It's always good to hear from you. Even when we disagree, the conversation is 
always civil and thought provoking.

I am glad to hear that you are open to arguments suggesting that your analysis 
might be incorrect. So, I accept your challenge to produce a document that 
describes the advantages of SRm6 over SRv6, as well as the differences between 
SRm6 and SRv6. Expect some operational hoarse-sense as well as some 
architectural deep-diving.

While the document will include words on scale and performance, running code 
will provide the most reliable evidence.

                                                                                
                         Happy holidays,
                                                                                
                               Ron


Juniper Business Use Only

-----Original Message-----
From: Darren Dukes (ddukes) <[email protected]<mailto:[email protected]>>
Sent: Monday, November 18, 2019 2:24 AM
To: 
[email protected]<mailto:[email protected]>;
 SPRING WG <[email protected]<mailto:[email protected]>>
Subject: SRm6: Motivation?

Hi Ron, to follow up on what was said at the mic.

The current community analysis, comparing existing solutions (SRv6 and SR-MPLS 
for IPv6) with SRm6, had the following result:
- a lot of differences (Architecture, Dataplane, Controlplane) and hence 
engineering cost
- scale, performance and complexity drawbacks
- no genuine advantage

Hence, the very first thing you need to do is to clearly compare your solution 
with respect to SRv6 and SR-MPLS and demonstrate why the above analysis is 
incorrect.

Only with such a logical analysis, will the community be able to judge whether 
this proposal should be pursued within SPRING.

Thanks
   Darren

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