[CCAMP] 答复: WG Last Call on draft-ietf-ccamp-flexible-grid-ospf-ext-04
Zhenghaomian <zhenghaomian@huawei.com> Fri, 01 July 2016 07:04 UTC
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From: Zhenghaomian <zhenghaomian@huawei.com>
To: Dieter Beller <Dieter.Beller@nokia.com>, Fatai Zhang <zhangfatai@huawei.com>, "CCAMP (ccamp@ietf.org)" <ccamp@ietf.org>
Thread-Topic: [CCAMP] WG Last Call on draft-ietf-ccamp-flexible-grid-ospf-ext-04
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Date: Fri, 01 Jul 2016 07:03:34 +0000
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Subject: [CCAMP] 答复: WG Last Call on draft-ietf-ccamp-flexible-grid-ospf-ext-04
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Hi, Dieter, Thanks for your comments, please see my reply inline: 发件人: CCAMP [mailto:ccamp-bounces@ietf.org] 代表 Dieter Beller 发送时间: 2016年6月30日 16:50 收件人: Fatai Zhang; CCAMP (ccamp@ietf.org) 主题: Re: [CCAMP] WG Last Call on draft-ietf-ccamp-flexible-grid-ospf-ext-04 Hi Fatai, CCAMPers, I've reviewed this document and I have the following comment: Section 4.1: 4.1. ISCD Extensions for Flexi-grid Value Type ----- ---- 152 (TBA by IANA) Flexi-Grid-LSC capable Switching Capability and Encoding values MUST be used as follows: Switching Capability = Flexi-Grid-LSC Encoding Type = lambda [as defined in RFC3471<https://tools.ietf.org/html/rfc3471>] When Switching Capability and Encoding fields are set to values as stated above, the Interface Switching Capability Descriptor MUST be interpreted as in [RFC4203<https://tools.ietf.org/html/rfc4203>] with the optional inclusion of one or more Switching Capability Specific Information sub-TLVs. draft-ietf-ccamp-flexible-grid-ospf-ext-04 defines the Switching Capability Specific Information sub-TLVs, but the ISCD as defined in RFC4203 contains "Max LSP Bandwidth at priority x" fields in the generic ISCD part and these fields do IMHO not make sense for flex grid (see below). The draft does not say how these fields shall be filled. [Haomian] I agree with what you said, the ‘Max LSP Bandwidth at priority x’ don’t make sense for flexi-grid, so we need to skip this in ISCD section. You are right we need to specify how to fill in even if we skip this section. How about we add the following statement in the end of section 4.1? Given the Switching Capability set to Flexi-Grid-LSC, the ‘Max LSP Bandwidth at priority x (x from 0 to 7)’ defined in [RFC4203] MUST be fulfilled with 0 and ignored. Do you think it’s clear enough? Excerpt from RFC4203: 1.4. Interface Switching Capability Descriptor The Interface Switching Capability Descriptor is a sub-TLV (of type 15) of the Link TLV. The length is the length of value field in octets. The format of the value field is as shown below: 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Switching Cap | Encoding | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 1 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 2 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 3 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 4 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 6 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 7 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Switching Capability-specific information | | (variable) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ The Switching Capability (Switching Cap) field contains one of the following values: 1 Packet-Switch Capable-1 (PSC-1) 2 Packet-Switch Capable-2 (PSC-2) 3 Packet-Switch Capable-3 (PSC-3) 4 Packet-Switch Capable-4 (PSC-4) 51 Layer-2 Switch Capable (L2SC) 100 Time-Division-Multiplex Capable (TDM) 150 Lambda-Switch Capable (LSC) 200 Fiber-Switch Capable (FSC) The Encoding field contains one of the values specified in Section<https://tools.ietf.org/html/rfc4203#section-3.1.1> 3.1.1<https://tools.ietf.org/html/rfc4203#section-3.1.1> of [GMPLS-SIG<https://tools.ietf.org/html/rfc4203#ref-GMPLS-SIG>]. Maximum LSP Bandwidth is encoded as a list of eight 4 octet fields in the IEEE floating point format [IEEE<https://tools.ietf.org/html/rfc4203#ref-IEEE>], with priority 0 first and priority 7 last. The units are bytes (not bits!) per second. The content of the Switching Capability specific information field depends on the value of the Switching Capability field. Minor nits: page 5 typo: 'Chanel Spacing' instead of 'Channel Spacing' [Haomian] Thanks, will update in the next version. page 7 editorial: 'Flexi-Grid-LSC capable': capable should be removed (already included in the LSC abbreviation). [Haomian] Thanks, will use ‘Flexi-Grid-LSC’ instead of ‘Flexi-Grid-LSC capable’, the replacement will also be applied in other a few places in the draft. Thanks, Dieter On 25.06.2016 04:35, Fatai Zhang wrote: Hi all, This starts a two week working group last call on [draft-ietf-ccamp-flexible-grid-ospf-ext-04]. The working group last call ends on Friday, July 8th. Please send your comments to the CCAMP mailing list. As is always the case, positive comments, e.g., "I've reviewed this document and believe it is ready for publication", are welcome. This is useful and important, even from authors. Since the WG chairs and secretary are co-authors/co-contributor of this draft, if anyone is willing to be the shepherd of the document, please volunteer. Note that no IPR was disclosed against this document. Thanks Fatai and Daniele _______________________________________________ CCAMP mailing list CCAMP@ietf.org<mailto:CCAMP@ietf.org> https://www.ietf.org/mailman/listinfo/ccamp -- Dieter Beller ASON/GMPLS Project Manager IP/Optical Networks, Optics, Nokia t: +49 711 821 43125 | m : +49 175 7266874 | OnNet: 259 43125 Dieter.Beller@nokia.com<mailto:Dieter.Beller@nokia.com> Alcatel-Lucent Deutschland AG | Lorenzstr. 10 | 70435 Stuttgart Sitz der Gesellschaft | Domicile of the Company: Stuttgart · Amtsgericht Stuttgart HRB 4026 Vorsitzender des Aufsichtsrates | Chairman of the Supervisory Board: Prof. J. Menno Harms Vorstand | Board of Management: Wilhelm Dresselhaus (Vorsitzender | Chairman) · Hans-Jörg Daub · Ralf Niederberger This e-mail and its attachments, if any, may contain confidential information. If you have received this e-mail in error, please notify us and delete or destroy the e-mail and its attachments, if any, immediately. 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- [CCAMP] 答复: WG Last Call on draft-ietf-ccamp-flex… Fatai Zhang
- [CCAMP] 答复: 答复: WG Last Call on draft-ietf-ccamp-… Zhenghaomian
- Re: [CCAMP] 答复: WG Last Call on draft-ietf-ccamp-… Dieter Beller
- [CCAMP] 答复: WG Last Call on draft-ietf-ccamp-flex… Zhenghaomian
- Re: [CCAMP] WG Last Call on draft-ietf-ccamp-flex… Dieter Beller
- Re: [CCAMP] WG Last Call on draft-ietf-ccamp-flex… Dieter Beller
- [CCAMP] WG Last Call on draft-ietf-ccamp-flexible… Fatai Zhang