Re: [mpls] draft-ietf-mpls-lsp-ping-ospfv3-codepoint-04.txt

[tom petch <[e-mail]>]

From: Loa Andersson <[e-mail]>
Sent: 03 February 2021 05:05

Tom,

While I'm a great fan of references, I don't see that it is necessary in
this case.

draft-ietf-mpls-lsp-ping-registries-update updates the Message Types,
Reply Modes, Return Codes. TLV and sub-TLV registries.

The code point for draft-ietf-mpls-lsp-ping-ospfv3-codepoint is
allocated from the "Protocol in the Segment ID sub-TLV" registry. This
registry is not change, so I don't see that the scenario you describe
below could play out.

<tp>
My starting point is that I cannot make sense of the IANA Considerations in this I-D. They might be clearer if they used the allocated numbers for TLV and sub-TLV.  

It  says
"   IANA is requested to assign a new code point for OSPFv3 from
   "Protocol in Label Stack Sub-TLV of Downstream Detailed Mapping TLV"
   registry under the "Multi-Protocol Label Switching (MPLS) Label
   Switched Paths (LSPs) Ping Parameters" registry as follows:"

Downstream Detailed Mapping TLV would appear to be TLV20 so Protocol in Label Stack Sub-TLV should be a sub-TLV of TLV20; there is no such sub-TLV. IANA lists
1 Multipath data [RFC8029]  
2 Label stack [RFC8029]  
3 FEC stack change [RFC8029]  
4 Local Interface Index [RFC8611]  
5 Remote Interface Index [RFC8611]  

I find that problematic.

Tom Petch 








/Loa

On 03/02/2021 01:39, tom petch wrote:
> I believe that this I-D needs a Normative Reference to
>               Updating the IANA MPLS LSP Ping Parameters
>               draft-ietf-mpls-lsp-ping-registries-update
> since that I-D updates the registry that this I-D then seeks to update and if this I-D gets there first then the update can be overridden by
>               Updating the IANA MPLS LSP Ping Parameters
>               draft-ietf-mpls-lsp-ping-registries-update-07
> and lost.
>
> And this last I-D changes the meaning of the registry which could be seen as theoretically rendering this I-D invalid.
>
> Tom Petch
>
> From: mpls <[e-mail]> on behalf of [e-mail] <[e-mail]>
> Sent: 27 January 2021 20:58
>
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Multiprotocol Label Switching WG of the IETF.
>
>          Title           : OSPFv3 CodePoint for MPLS LSP Ping
>          Authors         : Nagendra Kumar Nainar
>                            Carlos Pignataro
>                            Mustapha Aissaoui
>          Filename        : draft-ietf-mpls-lsp-ping-ospfv3-codepoint-04.txt
>          Pages           : 6
>          Date            : 2021-01-27
>

--

Loa Andersson                        email: [e-mail]
Senior MPLS Expert                          [e-mail]
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