[CCAMP] Comment on compatibility in draft-takacs-ccamp-revertive-ps
Lou Berger <lberger@labn.net> Fri, 08 November 2013 02:18 UTC
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Date: Thu, 07 Nov 2013 18:17:49 -0800
From: Lou Berger <lberger@labn.net>
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To: Zafar Ali <zali@cisco.com>, CCAMP <ccamp@ietf.org>
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Subject: [CCAMP] Comment on compatibility in draft-takacs-ccamp-revertive-ps
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Zafar, My comment in today's session was that you are redefining the format of an existing object (by adding TLVs) this breaks compatibility. You stated that this wasn't the case. FWIW: Your document says: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Length | Class-Num(37) | C-Type(2) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |S|P|N|O| Reserved | LSP Flags | Reserved | Link Flags| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |I|R| Reserved | Seg.Flags | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | ~ sub-TLVs ~ | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ RFC4872 says 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Length | Class-Num(37) | C-Type (2) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |S|P|N|O| Reserved | LSP Flags | Reserved | Link Flags| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Perhaps you meant C-Type(TBD). You should address compatibility explicitly in any case. Lou
- [CCAMP] Comment on compatibility in draft-takacs-… Lou Berger
- Re: [CCAMP] Comment on compatibility in draft-tak… Zafar Ali (zali)
- Re: [CCAMP] Comment on compatibility in draft-tak… Lou Berger
- Re: [CCAMP] Comment on compatibility in draft-tak… Dieter Beller
- Re: [CCAMP] Comment on compatibility in draft-tak… Fatai Zhang
- Re: [CCAMP] Comment on compatibility in draft-tak… Zafar Ali (zali)
- Re: [CCAMP] Comment on compatibility in draft-tak… Zafar Ali (zali)
- Re: [CCAMP] Comment on compatibility in draft-tak… Fatai Zhang
- Re: [CCAMP] Comment on compatibility in draft-tak… Zafar Ali (zali)
- Re: [CCAMP] Comment on compatibility in draft-tak… Zafar Ali (zali)
- Re: [CCAMP] Comment on compatibility in draft-tak… Fatai Zhang
- Re: [CCAMP] Comment on compatibility in draft-tak… Huub van Helvoort
- Re: [CCAMP] Comment on compatibility in draft-tak… John E Drake
- Re: [CCAMP] Comment on compatibility in draft-tak… Huub van Helvoort
- Re: [CCAMP] Comment on compatibility in draft-tak… John E Drake
- Re: [CCAMP] Comment on compatibility in draft-tak… Acee Lindem
- Re: [CCAMP] Comment on compatibility in draft-tak… Francesco Fondelli
- Re: [CCAMP] Comment on compatibility in draft-tak… Rajan Rao