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Re: [spring] draft-gandhi-spring-rfc6374-srpm-mpls return path

Stewart Bryant <stewart.bryant@gmail.com> Mon, 25 February 2019 12:25 UTC

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To: "Rakesh Gandhi (rgandhi)" <rgandhi@cisco.com>
Cc: "spring@ietf.org" <spring@ietf.org>
References: <e6c7f29e-6fc7-b6e5-06e7-52fc81b0017e@gmail.com> <EBC1CE03-6EE6-4486-8032-3F9B50E53272@cisco.com>
From: Stewart Bryant <stewart.bryant@gmail.com>
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Date: Mon, 25 Feb 2019 12:24:53 +0000
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Subject: Re: [spring] draft-gandhi-spring-rfc6374-srpm-mpls return path
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Hi Rakesh

Yes, that reference would be useful.

- Stewart

On 22/02/2019 22:37, Rakesh Gandhi (rgandhi) wrote:
> Hi Stewart,
>
> Thanks for your comments.
>
> There is a companion draft where this TLV is defined. We can add reference/text to indicate this.
> https://tools.ietf.org/html/draft-gandhi-spring-rfc6374-srpm-udp-00#section-3.2.3.1
>
> Hope this answers your question.
>
> Thanks,
> Rakesh
>
>
> On 2019-02-14, 9:43 AM, "spring on behalf of Stewart Bryant" <spring-bounces@ietf.org on behalf of stewart.bryant@gmail.com> wrote:
>
>      
>      I am not quite sure what it means to do a two way path measurement in
>      MPLS SR since MPLS SR defines a per packet unidirectional path. However,
>      assuming that this makes sense,  I don't see how the return path
>      information is carried in the RFC6374 message. The draft does not ask
>      IANA for any new types. Now it has been a long time since we wrote
>      RFC6374, but I don't remember the design having the capability you require.
>      
>      Please could clarify how the return path operates in an MPLS SR environment?
>      
>      Best Regards
>      
>      - Stewart
>      
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