Re: [Idr] WGLC for draft-ietf-idr-ls-trill-03

"John G. Scudder" <jgs@juniper.net> Wed, 21 March 2018 15:33 UTC

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From: "John G. Scudder" <jgs@juniper.net>
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Cc: trill@ietf.org, Hannes Gredler <hannes@gredler.at>, Adrian Farrel <adrian@olddog.co.uk>
To: "idr@ietf. org" <idr@ietf.org>, draft-ietf-idr-ls-trill@ietf.org
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/EeO_gMNFhlTXaDoaDfnntGuyr-4>
Subject: Re: [Idr] WGLC for draft-ietf-idr-ls-trill-03
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Hi All,

This WGLC collected exactly one expression of support other than from co-authors, from zhuangyan.zhuang@huawei.com. I'm afraid we don't have consensus to progress the document right now, or evidence that the document has received much in the way of review.

I do note several problems that will need to be resolved:

1. There are six front-page authors. There should be five or fewer, see the final bullet of https://trac.ietf.org/trac/idr/wiki/Checklist%20for%20writing%20a%20BGP-related%20draft

2. The IANA section has

   IANA is requested to assign one Node Flag bit for "Layer 3 Gateway"
   from the BGP-LS registry of BGP-LS Attribute TLVs.

however, the registry BGP-LS Node Descriptor, Link Descriptor, Prefix Descriptor, and Attribute TLVs <https://www.iana.org/assignments/bgp-ls-parameters/bgp-ls-parameters.xhtml#node-descriptor-link-descriptor-prefix-descriptor-attribute-tlv> actually has no provision for registering new flag bits. https://tools.ietf.org/html/rfc7752#section-3.3.1.1 simply lists them as "Reserved for future use". Possibly address this by requesting IANA to create the registry within the "Border Gateway Protocol - Link State (BGP-LS) Parameters" and allocate your bit from there. You would also have to make your draft update RFC 7752. I've cc'd Adrian and Hannes, the Designated Experts for that group of registries, in case they have further comment. 

3. Not precisely a problem, but are there implementations of the draft? As you know, if there aren't, by IDR WG convention we will stall until we do have some, even if we do complete a WGLC.

4. I'd kind of prefer you remove tables 1 and 2. They aren't authoritative and table 1 is actually obsolete. 

5. Section 3.3.1.1 has

           +----------+----------------------------+-----------+
           | Bit      |          Description       | Reference |
           +----------+----------------------------+-----------+
           | 'G'      | Layer 3 Gateway Bit        | [RFC7176] |
           | Reserved | Reserved for future use    |           |
           +----------+----------------------------+-----------+

I think the reference must be wrong. RFC 7176 ("Transparent Interconnection of Lots of Links (TRILL) Use of IS-IS") doesn't include the string "gateway" at all, so if the ref is correct, it's at best obscure. 

But in any case, per #2 above, probably this is not the right table in the right place.

6. I have read section 3.3.1.2 several times and don't understand it. Other than "what does it mean?" I wonder what the intent of table 6 is. It kind of resembles the table in section 5.2 of RFC 7176? I'm confused. 

7. Is this a typo?

   o  Does any fixed length TLV correspond to the TLV Length field in
      this document ?

Do you mean "every"?

8. In this:

         opaque TLV support the range of ISIS-TLV/SUB-TLV shown in Table
            3,  and link TLVs support the range in Figure 8.

there is no figure 8 in the document.

9. I don't know if the security section will fly, but then again I don't know if it won't. Once the doc is revised to address the above I'll ask the Sec Dir for a review.

Thanks,

--John
 
> On Oct 19, 2017, at 3:33 PM, John Scudder <jgs@juniper.net> wrote:
> 
> Hi All,
> 
> An IDR working group last call has been requested for draft-ietf-idr-ls-trill-03. Please reply to the list with your comments. As usual note we cannot advance the draft without participation from the group. Please get your comments in before November 3, 2017.
> 
> Authors, please confirm that any relevant IPR has been disclosed. 
> 
> https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dietf-2Didr-2Dls-2Dtrill-2D03&d=DwICAg&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=hLt5iDJpw7ukqICc0hoT7A&m=YQIHKfaMAUOrl3hLdgq6nw1PcXtmtpICF3XlGCVFreQ&s=6fwhGLRqq-HwpYC9ZJyaR60B_kl8F-1BV0Gd5B7XPl8&e=
> 
> Thanks,
> 
> --John
> 
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