Re: [mpls] [spring] Special purpose labels in draft-hegde-spring-traffic-accounting-for-sr-paths
"Zafar Ali (zali)" <zali@cisco.com> Mon, 20 November 2017 23:40 UTC
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From: "Zafar Ali (zali)" <zali@cisco.com>
To: John E Drake <jdrake@juniper.net>
CC: draft-hegde-spring-traffic-accounting-for-sr-paths <draft-hegde-spring-traffic-accounting-for-sr-paths@ietf.org>, spring <spring@ietf.org>, mpls <mpls@ietf.org>
Thread-Topic: [spring] [mpls] Special purpose labels in draft-hegde-spring-traffic-accounting-for-sr-paths
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Date: Mon, 20 Nov 2017 23:40:13 +0000
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Subject: Re: [mpls] [spring] Special purpose labels in draft-hegde-spring-traffic-accounting-for-sr-paths
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Hi John, My response to Adrian’s email should also cover this email too. However, as I also noted in email to Adrian … we all want to let this lingering tread die and follow-up on the next steps noted during this email exchange. I will be happy to have a webEx call and discuss it further, offline. Thanks Regards … Zafar From: "jdrake@juniper.net" <jdrake@juniper.net> Date: Sunday, November 19, 2017 at 12:59 PM To: "Zafar Ali (zali)" <zali@cisco.com> Cc: draft-hegde-spring-traffic-accounting-for-sr-paths <draft-hegde-spring-traffic-accounting-for-sr-paths@ietf.org>, spring <spring@ietf.org>, "mpls@ietf.org" <mpls@ietf.org> Subject: RE: [spring] [mpls] Special purpose labels in draft-hegde-spring-traffic-accounting-for-sr-paths Hi, Comments inline Yours Irrespectively, John From: spring [mailto:spring-bounces@ietf.org] On Behalf Of Zafar Ali (zali) Sent: Saturday, November 18, 2017 1:12 AM To: John E Drake <jdrake@juniper.net> Cc: draft-hegde-spring-traffic-accounting-for-sr-paths <draft-hegde-spring-traffic-accounting-for-sr-paths@ietf.org>; spring <spring@ietf.org>; mpls <mpls@ietf.org> Subject: Re: [spring] [mpls] Special purpose labels in draft-hegde-spring-traffic-accounting-for-sr-paths Hi John, Sorry for delay in the response; I was away from the emails. Please see in-line. Thanks Regards … Zafar <snip> <snip> procedure (in draft-hegde-spring-traffic-accounting-for-sr-paths) that breaks SR Architecture, highly unscalable and complicated to implement. [JD] Do you have any evidence to justify any of your assertions, above? Please note that in draft-hegde-spring-traffic-accounting-for-sr-paths: • The transit node needs to be able to recognize the special label, read the SR Path Identification label and update the counter against such “states”. [JD] I think I mentioned in a previous email that this is the type of capability used by RSVP-TE LSPs since the advent of MPLS • The draft proposes to push (up to) 3 Labels for each segment in the SR Path. That means that label stack is increased up to 3x times! This is a serious a scaling issue. [JD] Um, no. Two or three labels per SR segment list (aka MPLS label stack) • The controller needs to keep track of transit node capability and push the additional per-path labels, accordingly. I.e., the controller also needs to maintain such information for the transit nodes. [JD] Absolutely not, whatever gave you that idea? If a transit node understands the labels it can maintain and report the counters, otherwise it doesn’t, but the controller doesn’t need to know this a priori. <snip>
- [mpls] Special purpose labels in draft-hegde-spri… Greg Mirsky
- Re: [mpls] [spring] Special purpose labels in dra… Zafar Ali (zali)
- Re: [mpls] [spring] Special purpose labels in dra… Stewart Bryant
- Re: [mpls] [spring] Special purpose labels in dra… Xuxiaohu
- Re: [mpls] [spring] Special purpose labels in dra… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Greg Mirsky
- Re: [mpls] [spring] Special purpose labels in dra… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Greg Mirsky
- Re: [mpls] [spring] Special purpose labels in dra… Greg Mirsky
- Re: [mpls] [spring] Special purpose labels in dra… ShaoWen Ma
- Re: [mpls] [spring] Special purpose labels in dra… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Jeff Tantsura
- Re: [mpls] [spring] Special purpose labels in dra… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Xuxiaohu
- Re: [mpls] [spring] Special purpose labels in dra… Jeff Tantsura
- Re: [mpls] [spring] Special purpose labels in dra… Shraddha Hegde
- Re: [mpls] [spring] Special purpose labels in dra… David Allan I
- Re: [mpls] [spring] Special purpose labels in dra… Mach Chen
- Re: [mpls] [spring] Special purpose labels in dra… Xuxiaohu
- Re: [mpls] [spring] Special purpose labels in dra… Mach Chen
- Re: [mpls] [spring] Special purpose labels in dra… Shah, Himanshu
- Re: [mpls] [spring] Special purpose labels in dra… Xuxiaohu
- Re: [mpls] [spring] Special purpose labels in dra… Mach Chen
- Re: [mpls] [spring] Special purpose labels in dra… Mach Chen
- Re: [mpls] [spring] Special purpose labels in dra… Chengli (IP Technology Research)
- Re: [mpls] [spring] Special purpose labels in dra… Jeff Tantsura
- Re: [mpls] [spring] Special purpose labels in dra… Xuxiaohu
- Re: [mpls] [spring] Special purpose labels in dra… Xuxiaohu
- Re: [mpls] [spring] Special purpose labels in dra… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Alexander Vainshtein
- Re: [mpls] [spring] Special purpose labels in dra… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Zafar Ali (zali)
- Re: [mpls] [spring] Special purpose labels in dra… Greg Mirsky
- Re: [mpls] [spring] Special purpose labels in dra… Alexander Vainshtein
- Re: [mpls] [spring] Special purpose labels in dra… Ruediger.Geib
- Re: [mpls] [spring] Special purpose labels in dra… Greg Mirsky
- Re: [mpls] [spring] Special purpose labels in dra… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Alexander Vainshtein
- [mpls] Whether both E2E and SPME performance meas… Mach Chen
- Re: [mpls] [spring] Special purpose labels in dra… Alexander Vainshtein
- Re: [mpls] Whether both E2E and SPME performance … David Allan I
- Re: [mpls] Whether both E2E and SPME performance … Mach Chen
- Re: [mpls] [spring] Special purpose labels in dra… Greg Mirsky
- Re: [mpls] Whether both E2E and SPME performance … Ruediger.Geib
- Re: [mpls] [spring] Special purpose labels in dra… stephane.litkowski
- Re: [mpls] Whether both E2E and SPME performance … Robert Raszuk
- Re: [mpls] Whether both E2E and SPME performance … Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Alexander Vainshtein
- Re: [mpls] Whether both E2E and SPME performance … John E Drake
- Re: [mpls] [spring] Special purpose labels in dra… John E Drake
- Re: [mpls] [spring] Special purpose labels in dra… John E Drake
- Re: [mpls] Whether both E2E and SPME performance … Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Alexander Vainshtein
- Re: [mpls] [spring] Whether both E2E and SPME per… Alexander Vainshtein
- Re: [mpls] Whether both E2E and SPME performance … John E Drake
- Re: [mpls] [spring] Special purpose labels in dra… John E Drake
- Re: [mpls] [spring] Special purpose labels in dra… John E Drake
- Re: [mpls] Whether both E2E and SPME performance … John E Drake
- Re: [mpls] [spring] Whether both E2E and SPME per… John E Drake
- Re: [mpls] [spring] Special purpose labels in dra… John E Drake
- Re: [mpls] [spring] Special purpose labels in dra… John E Drake
- Re: [mpls] [spring] Whether both E2E and SPME per… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Mach Chen
- Re: [mpls] [spring] Special purpose labels in dra… Mach Chen
- Re: [mpls] [spring] Whether both E2E and SPME per… John E Drake
- Re: [mpls] [spring] Whether both E2E and SPME per… John E Drake
- Re: [mpls] [spring] Whether both E2E and SPME per… Robert Raszuk
- Re: [mpls] [spring] Whether both E2E and SPME per… Alexander Vainshtein
- Re: [mpls] [spring] Whether both E2E and SPME per… Greg Mirsky
- Re: [mpls] [spring] Whether both E2E and SPME per… Mach Chen
- Re: [mpls] [spring] Special purpose labels in dra… Stewart Bryant
- Re: [mpls] [spring] Whether both E2E and SPME per… Greg Mirsky
- [mpls] Fwd: Re: [spring] Special purpose labels i… Stewart Bryant
- Re: [mpls] [spring] Special purpose labels in dra… Jeff Tantsura
- Re: [mpls] Fwd: Re: [spring] Special purpose labe… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Mach Chen
- Re: [mpls] Fwd: Re: [spring] Special purpose labe… Stewart Bryant
- Re: [mpls] [spring] Special purpose labels in dra… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… John E Drake
- Re: [mpls] Fwd: Re: [spring] Special purpose labe… Uma Chunduri
- Re: [mpls] [spring] Special purpose labels in dra… Stewart Bryant
- Re: [mpls] [spring] Special purpose labels in dra… Stewart Bryant
- Re: [mpls] [spring] Special purpose labels in dra… Robert Raszuk
- [mpls] measurement requirements (was Re: [spring]… Martin Horneffer
- Re: [mpls] [spring] Special purpose labels in dra… Martin Horneffer
- Re: [mpls] [spring] Special purpose labels in dra… Zafar Ali (zali)
- Re: [mpls] [spring] measurement requirements (was… Zafar Ali (zali)
- Re: [mpls] [spring] Special purpose labels in dra… Adrian Farrel
- Re: [mpls] [spring] Special purpose labels in dra… John E Drake
- Re: [mpls] [spring] Special purpose labels in dra… Zafar Ali (zali)
- Re: [mpls] [spring] Special purpose labels in dra… Zafar Ali (zali)
- Re: [mpls] [spring] Special purpose labels in dra… Greg Mirsky
- Re: [mpls] [spring] Special purpose labels in dra… Zafar Ali (zali)
- Re: [mpls] [spring] Special purpose labels in dra… Greg Mirsky
- Re: [mpls] [spring] Special purpose labels in dra… Zafar Ali (zali)
- Re: [mpls] [spring] Special purpose labels in dra… Adrian Farrel
- Re: [mpls] [spring] Special purpose labels in dra… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Zafar Ali (zali)
- Re: [mpls] [spring] Special purpose labels in dra… Stewart Bryant
- Re: [mpls] [spring] Special purpose labels in dra… Martin Horneffer
- Re: [mpls] [spring] Special purpose labels in dra… Jeff Tantsura
- Re: [mpls] [spring] Special purpose labels in dra… Robert Raszuk
- Re: [mpls] [spring] Special purpose labels in dra… Carlos Pignataro (cpignata)
- Re: [mpls] [spring] Special purpose labels in dra… Carlos Pignataro (cpignata)
- Re: [mpls] [spring] Special purpose labels in dra… Carlos Pignataro (cpignata)
- Re: [mpls] [spring] Special purpose labels in dra… Greg Mirsky
- Re: [mpls] [spring] Special purpose labels in dra… Carlos Pignataro (cpignata)