Re: [Lsr] FW: New Version Notification for draft-white-distoptflood-00.txt

<7riw77@gmail.com> Mon, 01 April 2019 09:44 UTC

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From: 7riw77@gmail.com
To: "'Les Ginsberg (ginsberg)'" <ginsberg@cisco.com>, lsr@ietf.org
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Date: Mon, 01 Apr 2019 05:44:25 -0400
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Subject: Re: [Lsr] FW: New Version Notification for draft-white-distoptflood-00.txt
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> 1)Section 3 defines an algorithm which is used to "calculate" the flooding
> topology. As such, this draft is not an alternative to draft-ietf-lsr-dynamic-
> flooding.  It is simply one of potentially many drafts which may be written
> which will define such an algorithm, Note that definition of algorithms is
> outside the scope of draft-ietf-lsr-dynamic-flooding.

Correct. This was my initial impression when I read draft-ietf-lsr-dynamic-flooding.

> I think this should be made clear in your draft.

Sure -- I can add this bit.

> 2)The use of Circuit Scoped LSPs (RFC 7356) to flood standard L1/L2 LSPs to
> "DNR" nodes as defined in Section 3.1 of the draft is an invalid usage of CS-
> LSPs. The content of CS-LSPs is NOT identical to standard LSPs and the 1:1
> equivalence you seem to require is inconsistent with RFC 7356.

Hm... I will need to look at this -- it might be worth chatting about this off line to see how to bring this in line. 

> 3)The adjacency formation logic discussed in Section 2 isn’t directly relevant
> to calculating a flooding topology. There are existing implementations which
> use the techniques you define as a means of reducing redundant flooding
> associated with adjacency bringup when there are parallel links between two
> nodes. Note this can be (and is) done without  requiring protocol
> extensions/specification i.e., a node can do this today without introducing
> any interoperability issues. So while this is definitely a good idea, it isn’t
> directly related to the work on flooding topologies and I think is better
> removed from the draft.

Okay -- it seems like this technique is not documented anyplace, and could be used for all adjacencies.

😊 /r