Re: [sfc] FW: I-D Action: draft-kumar-ipfix-sfc-extension-00.txt
"Nagendra Kumar Nainar (naikumar)" <naikumar@cisco.com> Wed, 29 April 2015 01:39 UTC
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From: "Nagendra Kumar Nainar (naikumar)" <naikumar@cisco.com>
To: "Joel M. Halpern" <jmh@joelhalpern.com>, "ipfix@ietf.org" <ipfix@ietf.org>, "sfc@ietf.org" <sfc@ietf.org>
Thread-Topic: [sfc] FW: I-D Action: draft-kumar-ipfix-sfc-extension-00.txt
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Date: Wed, 29 Apr 2015 01:39:31 +0000
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Cc: "draft-kumar-ipfix-sfc-extension@tools.ietf.org" <draft-kumar-ipfix-sfc-extension@tools.ietf.org>
Subject: Re: [sfc] FW: I-D Action: draft-kumar-ipfix-sfc-extension-00.txt
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Hi Joel, Thanks for the comments. Please see inline.. >I am wondering if the nextSFF fields really belong here? >I see several problems with them. If the observation is being made >before the SF, or between multiple local SF, then the information does >not exist. <Nagendra> I think unobserved field by metering process while generating flow record is not specific to SFC scenarios. This is discussed in below draft, https://tools.ietf.org/html/draft-aitken-ipfix-unobserved-fields-03 I think the consensus can be applicable for SFC scenarios as well. >Even if the observation is being made after the last local >SF, the identification of the next SFF, as understood by this SFF, may >well not be an IP address. What the local SFF knows may be an IP >address, and Ethernet Address, an MPLS label, etc. So I am not sure >this makes sense as a reportable. <Nagendra> Good point. I will check this and will include the update in next revision. > >Otherwise, it looks quite reasonable and useful. Thanks, Nagendra > > >On 4/26/15 4:35 PM, Nagendra Kumar Nainar (naikumar) wrote: >> Hi, >> >> Below is the draft proposed on IPFIX information elements for SFC. >> >> We welcome any comments/feedbacks. >> >> Regards, >> Draft Authors. >> >> On 3/9/15, 8:49 AM, "internet-drafts@ietf.org" >><internet-drafts@ietf.org> >> wrote: >> >>> >>> A New Internet-Draft is available from the on-line Internet-Drafts >>> directories. >>> >>> >>> Title : IPFIX Information Element extension for SFC >>> Authors : Nagendra Kumar >>> Carlos Pignataro >>> Paul Quinn >>> Filename : draft-kumar-ipfix-sfc-extension-00.txt >>> Pages : 11 >>> Date : 2015-03-09 >>> >>> Abstract: >>> Service Function Chaining (SFC) is an architecture that enables any >>> operator to apply selective set of services by steering the traffic >>> through an ordered set of service functions without any topology >>> dependency. >>> >>> This document defines the required Information Elements to represent >>> the details about service flows over any Service Function Path. >>> >>> >>> The IETF datatracker status page for this draft is: >>> https://datatracker.ietf.org/doc/draft-kumar-ipfix-sfc-extension/ >>> >>> There's also a htmlized version available at: >>> http://tools.ietf.org/html/draft-kumar-ipfix-sfc-extension-00 >>> >>> >>> Please note that it may take a couple of minutes from the time of >>> submission >>> until the htmlized version and diff are available at tools.ietf.org. >>> >>> Internet-Drafts are also available by anonymous FTP at: >>> ftp://ftp.ietf.org/internet-drafts/ >>> >>> _______________________________________________ >>> I-D-Announce mailing list >>> I-D-Announce@ietf.org >>> https://www.ietf.org/mailman/listinfo/i-d-announce >>> Internet-Draft directories: http://www.ietf.org/shadow.html >>> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt >> >> _______________________________________________ >> sfc mailing list >> sfc@ietf.org >> https://www.ietf.org/mailman/listinfo/sfc >>
- [sfc] FW: I-D Action: draft-kumar-ipfix-sfc-exten… Nagendra Kumar Nainar (naikumar)
- Re: [sfc] FW: I-D Action: draft-kumar-ipfix-sfc-e… Joel M. Halpern
- Re: [sfc] FW: I-D Action: draft-kumar-ipfix-sfc-e… Nagendra Kumar Nainar (naikumar)