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Re: [OSPF] [Bier] WGLC: draft-ietf-bier-ospf-bier-extensions-05

Eric C Rosen <erosen@juniper.net> Mon, 19 June 2017 21:44 UTC

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To: "Acee Lindem (acee)" <acee@cisco.com>, "gjshep@gmail.com" <gjshep@gmail.com>, "bier@ietf.org" <bier@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>
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From: Eric C Rosen <erosen@juniper.net>
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Date: Mon, 19 Jun 2017 17:44:07 -0400
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ospf/CyKiEk4KDYAX833ZLkzi_tHSVDE>
Subject: Re: [OSPF] [Bier] WGLC: draft-ietf-bier-ospf-bier-extensions-05
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> It is somewhat strange to make protocol drafts standards track while 
> the architecture and encapsulations are experimental. 

I believe the documents are all supposed to be Experimental. However, 
this is not necessarily reflected correctly on the first page of each draft.

> The second example in the MPLS encapsulation draft implies a single 
> contiguous range of labels when, in fact, it must be encoded as 4 
> separate label ranges in the OSPF draft. 

That implication is unintended, as there is no suggestion that the 
labels L1, ..., L12 are successive numeric values.  At least, there was 
no intent to suggest that.  I can add a sentence to make that clearer.

> I think It would be good then to tie the IGP encodings to the two 
> examples.

I think it is appropriate in that example to point out that twelve 
labels must be allocated, each corresponding to a different <SD, BDL, 
SI> triple.  How those twelve labels get signaled is outside the scope 
of the encapsulation spec, and is totally a matter for the signaling 
documents to address.

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