sr - spring - what's the deal with 2 names

Jeff Tantsura jefftant.ietf at
Sun Sep 6 08:14:14 UTC 2020


Out of curiosity - if you are interested in SR, where are you getting your information from if not IETF (SPRING)?
As for history - we (at Redback) have published 1st draft describing SR-MPLS data plane in 2003 (LDP control plane).


> On Sep 6, 2020, at 09:53, Saku Ytti via NANOG <nanog at> wrote:
> Hey,
>> On Sun, 6 Sep 2020 at 04:26, Aaron Gould via NANOG <nanog at> wrote:
>> Does anyone know the scope on why we have 2 names for this ?  Seriously, was it one of those things where a vendor started doing it first (pre-standard) as sr, and then ietf started standardizing it as spring ? …or was it always being standardized pre-vendor implementation and there was a disagreement within ietf or elsewhere ?  or… was there a conscious decision amongst the inventors to actually call it both sr and spring ?  or is their actually something different about each one and I’m wrong in thinking they are 2 names for the same technology.
> If you don't like the names, I have others.
> SPRING is the IETF working group name - Source Packet Routing in Networking
> Segment Routing is under SPRING
> -- 
>  ++ytti

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