RE: [spring] CRH is back to the SPRING Use-Case - Re: Size of CR in CRH

"Ketan Talaulikar (ketant)" <ketant@cisco.com> Mon, 25 May 2020 09:20 UTC

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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org>, "Joel M. Halpern" <jmh@joelhalpern.com>
CC: "rtg-ads@ietf.org" <rtg-ads@ietf.org>, "spring@ietf.org" <spring@ietf.org>, 6man <6man@ietf.org>
Subject: RE: [spring] CRH is back to the SPRING Use-Case - Re: Size of CR in CRH
Thread-Topic: [spring] CRH is back to the SPRING Use-Case - Re: Size of CR in CRH
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Date: Mon, 25 May 2020 09:20:39 +0000
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Hi Ron,

Thanks for that clarification.

I note that you are not anymore saying "Are not interested in SR" like you had mentioned before the WG adoption call : https://mailarchive.ietf.org/arch/msg/ipv6/LheyFD_uwuHp7tiG8Y1CwKngDYI/

So, would it be fair to say that the operator that you are referring to below, wishes to deploy a Traffic Engineering solution using a subset of Segment Routing (i.e. a reduced portion of Spring Architecture) that only supports prefix and adjacency SIDs as indicated by the two "forwarding methods" that are referred to in draft-bonica-6man-comp-rtg-hdr?

Thanks,
Ketan

-----Original Message-----
From: Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org> 
Sent: 25 May 2020 09:03
To: Ketan Talaulikar (ketant) <ketant@cisco.com>om>; Joel M. Halpern <jmh@joelhalpern.com>
Cc: rtg-ads@ietf.org; spring@ietf.org; 6man <6man@ietf.org>
Subject: RE: [spring] CRH is back to the SPRING Use-Case - Re: Size of CR in CRH

Ketan,

Please consider an operator who:

- Wants a way to steer IPv6 packets through a specified path that includes many nodes (>8)
- Does not want any of the following:
	- A new VPN encapsulation technique
	- A new service function chaining technique
	- Network programming
	- MPLS and uSID
	- To encoding instructions in IPv6 addresses.

These operators want a compact routing header, nothing more.

                                                                           Ron


Juniper Business Use Only

-----Original Message-----
From: ipv6 <ipv6-bounces@ietf.org> On Behalf Of Ketan Talaulikar (ketant)
Sent: Sunday, May 24, 2020 1:42 AM
To: Joel M. Halpern <jmh@joelhalpern.com>
Cc: rtg-ads@ietf.org; spring@ietf.org; 6man <6man@ietf.org>
Subject: RE: [spring] CRH is back to the SPRING Use-Case - Re: Size of CR in CRH

[SNIP]

I am looking for explanation of the "other ways" that CRH can be used (i.e. those outside the Spring architecture). I am trying to understand from the authors what would be the applicability of that solution, it's use-cases and it's requirements. That is what, I believe, will help us evaluate the CRH proposal in the context of this working call. That will help us answer these questions like the scope of the SID, 32-bit or 16-bit or something else and what the CRH-FIB is going to turn out like.


[SNIP]
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