Re: [IPFIX] Search comments and feedbacks about the draft of IPFIX IE extension when considering BGP community

PJ Aitken <paitken@brocade.com> Wed, 20 July 2016 14:49 UTC

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From: PJ Aitken <paitken@brocade.com>
To: Benoit Claise <bclaise@cisco.com>, Ariel Gu <gurong@chinamobile.com>, <ipfix@ietf.org>, <n.brownlee@auckland.ac.nz>, <quittek@neclab.eu>
References: <002501d1e1c2$8fb45440$af1cfcc0$@chinamobile.com> <321dd0a3-986a-6df2-ca29-d414929f36bc@cisco.com>
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Date: Wed, 20 Jul 2016 15:49:06 +0100
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Cc: "ie-doctors@ietf.org" <ie-doctors@ietf.org>, lizhenqiang <lizhenqiang@chinamobile.com>, Brian Trammell <trammell@tik.ee.ethz.ch>
Subject: Re: [IPFIX] Search comments and feedbacks about the draft of IPFIX IE extension when considering BGP community
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When a draft specifies one of the list types, should it also specify the 
type of the list elements and the expected semantics?

Else we could have non-interoperable implementations exporting the same 
"IANA standard" information element, where one is a "basicList of X" 
while another is a "basicList of Y".
ie, although the IE is the same, the basicList Field ID and semantics 
are different. See RFC 6313, Figure 1.)

eg, the BGP community draft referenced below creates a new 
bgpSourceCommunityList. I suppose this may be a list of 
bgpSourceAsNumber, but that's not specified in the draft - so it could 
equally be a list of sourceIPv4Address or any other IE.

Alternatively, devices could simply export IE #291 (basicList), with the 
bgpSourceCommunityList and bgpDestinationCommunityList disambiguated by 
the basicList Field ID contained in the basicList header. However that 
would be horrendous for collectors...

P.


On 20/07/16 08:12, Benoit Claise wrote:
> Dear all,
>
> We know that the IANA considerations 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_rfc7012-23section-2D7&d=CwMDEA&c=IL_XqQWOjubgfqINi2jTzg&r=Xx9729xYDYoCgBDdcp1FKt5PyYd1TCoXNKhyPY8CFp8&m=ZslthyAR_pCMk0ceVDm68IQNaZBed3zfEKAlZ4zaux4&s=PT25lVmWADTBAoRFJls07fJ6PTOd2XWc0L4bTWxB3MY&e=> 
> mentions "expert review" for the IPFIX registry 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.iana.org_assignments_ipfix_ipfix.xhtml&d=CwMDEA&c=IL_XqQWOjubgfqINi2jTzg&r=Xx9729xYDYoCgBDdcp1FKt5PyYd1TCoXNKhyPY8CFp8&m=ZslthyAR_pCMk0ceVDm68IQNaZBed3zfEKAlZ4zaux4&s=tbt3wdaVgevcKVTqBEKX_MhNO7g_oaW3XiywAp65WgY&e=>.
> This BGP community is actually a special IPFIX Information Element as 
> this is the first one based on RFC 6313 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_rfc6313&d=CwMDEA&c=IL_XqQWOjubgfqINi2jTzg&r=Xx9729xYDYoCgBDdcp1FKt5PyYd1TCoXNKhyPY8CFp8&m=ZslthyAR_pCMk0ceVDm68IQNaZBed3zfEKAlZ4zaux4&s=R9ipRubr7eEQrMnskDLzBjeZqhpnmefnWc59t3_ab7s&e=>(basicList, 
> subTemplateList, subTemplateMultiList)
> So it deserves special attention, review, and potential documentation 
> as its own RFC.
>
> Regards, Benoit
>
>> Hi, dear all.
>>
>> Nice meeting you in the mail-list of IPFIX. This IETF in Berlin right 
>> now, we submit a draft and present it about the IPFIX IE extension 
>> when considering BGP community. I’m looking for comments and 
>> feedbacks about our idea in new IE added in exporting the flow 
>> information correlated with BGP community. As dear chair told me that 
>> the mail-list is still alive, I follow the suggestion of putting my 
>> draft here and searching for advice and suggestions in the right place.
>>
>> Before that, I made a short summary of my draft which may be helpful 
>> in quick looking at the draft. When we consider traffic steering in 
>> our backbone network, we feel that the flow information based on BGP 
>> community is quite suitable. That’s the reason why we write the 
>> draft. And we now recommend two IEs which may be assigned by IANA: 
>> bgpSourceCommunityList and bgpDestinationCommunityList.
>>
>> If you are facing up with this situations as us, then we can discuss 
>> about the IEs especially the details.
>>
>> The information of my draft: 
>> https://www.ietf.org/internet-drafts/draft-li-opsawg-ipfix-bgp-community-00.txt 
>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_internet-2Ddrafts_draft-2Dli-2Dopsawg-2Dipfix-2Dbgp-2Dcommunity-2D00.txt&d=CwMDEA&c=IL_XqQWOjubgfqINi2jTzg&r=Xx9729xYDYoCgBDdcp1FKt5PyYd1TCoXNKhyPY8CFp8&m=ZslthyAR_pCMk0ceVDm68IQNaZBed3zfEKAlZ4zaux4&s=T9dMbA_3xk8ZMfCI0dkNONKt1xL04aoMa8vn_-9FBns&e=>
>>
>> I’m looking forward for your comments.
>>
>> Best regards and have a nice trip in Berlin.
>>
>> -----------------------------------------------------------
>>
>> Rong Gu
>> China Mobile Research Institute
>> No.32 Xuanwumen West Street, Xicheng District
>> Beijing, China, 100053
>> Mobile: +86 13811520541
>> Phone: +86 10 15801696688 Ext. 36211
>> Email: gurong@chinamobile.com <mailto:huanglu@chinamobile.com>
>>
>
>
>
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