Re: [IPFIX] [sfc] FW: I-D Action: draft-kumar-ipfix-sfc-extension-00.txt

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, "[email protected]"
>><[email protected]>
>> 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
>>> [email protected]
>>> 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
>> [email protected]
>> https://www.ietf.org/mailman/listinfo/sfc
>>

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