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Re: [OSPF] New Version Notification for draft-ietf-ospf-ospfv3-lsa-extend-02.txt

Acee Lindem <acee.lindem@ericsson.com> Sat, 19 April 2014 02:08 UTC

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From: Acee Lindem <acee.lindem@ericsson.com>
To: prz <prz@zeta2.ch>
Thread-Topic: [OSPF] New Version Notification for draft-ietf-ospf-ospfv3-lsa-extend-02.txt
Thread-Index: AQHPW0aJPmTagfMT+kORJpirhr5WfpsYN6cAgAAC2gCAADPcgP//kVQA
Date: Sat, 19 Apr 2014 02:08:31 +0000
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References: <20140418153616.2339.51730.idtracker@ietfa.amsl.com> <CF7698CD.2C967%acee.lindem@ericsson.com> <53515038.9070407@cisco.com> <54238B77-60C7-4392-B396-A5B6B43B31BC@ericsson.com> <53515978.5070700@cisco.com> <357C7548-A5EE-4849-B72F-4FD1D386BB8D@ericsson.com> <001e83b64d76b7eadea70a1854378b2d@zeta2.ch> <574D52F9-8870-4035-85D6-FB40E37AA91A@ericsson.com> <334a85406cc387a012a5962c112c21c8@zeta2.ch>
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Cc: OSPF List <ospf@ietf.org>
Subject: Re: [OSPF] New Version Notification for draft-ietf-ospf-ospfv3-lsa-extend-02.txt
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Ok - Agreed. 

Thanks,
Acee 

On 4/18/14 6:44 PM, "prz" <prz@zeta2.ch> wrote:

>
>>> . the only reason the migration holds together without stable loops
>>> is that there is an implicit assumption in the draft (I didn't see it
>>> spelled out but then again I skimmed over it only) that the metric
>>> advertised in TLVs and old style is always absolutely the same. I
>>> suggest to spell that out strongly.
>>
>> It is implicit but it seems rather obvious that if one originates the
>> non-extended and extended versions of the same LSA, the content MUST
>> be the same. However, I can state this explicitly.
>>
>
> agreed but then again, there are so many metrics floating in those
> protocols now that if you couple them implicitly (which you do with this
> draft) I don't think spelling it out cleanly and strongly hurts (given
> that the whole migration in the draft only holds together under this
> very assumption).
>
> And I never seize to be amazed what kind of stuff people build based on
> RFCs and how I come to completely wrong conclusion as what they mean
> when I read them (but that can be just feeble old age of mine or
> intentional by authors ;-)
>
> --- tony
>
>

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