Re: [ippm] WGLC for draft-ietf-ippm-ioam-yang

t petch <ietfa@btconnect.com> Fri, 12 August 2022 15:45 UTC

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To: Tianran Zhou <zhoutianran@huawei.com>, Tommy Pauly <tpauly=40apple.com@dmarc.ietf.org>, IETF IPPM WG <ippm@ietf.org>
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From: t petch <ietfa@btconnect.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ippm/-Bjp9piOTdxFiItTG_Bp5TmTKAk>
Subject: Re: [ippm] WGLC for draft-ietf-ippm-ioam-yang
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On 12/08/2022 07:03, Tianran Zhou wrote:
> Hi Tom,
>
> Thanks very much for your comments.
> Please see inline.
>
> Cheers,
> Tianran
> -----Original Message-----
> From: ippm [mailto:ippm-bounces@ietf.org] On Behalf Of t petch
> Sent: Thursday, August 11, 2022 7:13 PM
>
> On 09/08/2022 17:15, Tommy Pauly wrote:
>>
>> This email starts a Working Group Last Call for draft-ietf-ippm-ioam-yang.
>>
>> https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-yang/
>> https://www.ietf.org/archive/id/draft-ietf-ippm-ioam-yang-04.html
>>
>
> Not ready
>
> no examples
>
> ZTR> Yes, we need to add them in the appendix.
>
> RFC8343, RFC9197 need adding to I-D refs
>
> ZTR> Good capture. Thanks. I will add.
>
> 'Simplified BSD License' is out of date - should be Revised although it can be a challenge to get it there
>
> ZTR> Yes, I will update the copy right.
>
> YANG module has lower case 'must' - intended?
>
> ZTR> No intention. I searched the document. All the lower case "must" are in the "description". Do you think they should be uppercase?

Well yes, but RFC9197 (needs adding to the I-D references and to the 
YANG) has a MUST for e.g. support of the default namespace so having a 
lower case 'must' to me downgrades that requirement whereever it 
appears.  It is common for YANG modules to have RFC8174 language with 
the disclaimer therefrom next to the Copyright of the module.

In passing, the spelling of 'namespace' is inconsistent.


> leaf profile-name
>    length "1 .. max"
> that is a very large number of characters
>
> ZTR> This is an acceptable option by the early YANG doctor review. I actually cannot imagine what kind of limits we should apply. It's only clear that 0 should be excluded.

I wonder if there is a security exposure such as a buffer overflow when 
a string is 18446744073709551615 characters long.

Tom Petch

> Tom Petch
>
>>
>> The last call will go until Wednesday, August 31.
>>
>> Best,
>> Tommy & Marcus
>>
>>