Re: [lisp] I-D Action: draft-ietf-lisp-pubsub-05.txt

[Joel Halpern <[e-mail]>]

I was reading this draft again to think about the questions Alberto 
raised on the list.  In doing so, I came across something that I think 
needs to be clarified.

In section 5, I see the following two sentences:
  If the subscription fails, the Map-Server MUST send a Map-Reply to
  the originator of the Map-Request, as described in
  [I-D.ietf-lisp-rfc6833bis].  This is also the case when the Map-
  Server does not support PubSub operation.

I understand the first sentence.  The second sentence appears to cover 
two different cases.  One case is where the Map-Server understands 
PubSub, but does not accept it.  Okay.  I can see an error in that case. 
  But, as written, this seems to be intended to apply to a Map-Server 
that has never heard of the PubSub extension.  Such a Map-Server will 
ignore the I bit and ignore the N bit.  It will not know that this is a 
PubSub request, and as such will not generate an error.  I have no 
problem with generating an error in the known but not supported case. 
Can we (when we revise the draft) clarify the text?
(It took me a little bit to realize that this text probably meant the 
known but not supported case, as it was the unknown case that came to 
mind first.)

Yours,
Joel

On 3/18/2020 8:50 PM, [e-mail] wrote:
> 
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Locator/ID Separation Protocol WG of the IETF.
> 
>          Title           : Publish/Subscribe Functionality for LISP
>          Authors         : Alberto Rodriguez-Natal
>                            Vina Ermagan
>                            Johnson Leong
>                            Fabio Maino
>                            Albert Cabellos-Aparicio
>                            Sharon Barkai
>                            Dino Farinacci
>                            Mohamed Boucadair
>                            Christian Jacquenet
>                            Stefano Secci
> 	Filename        : draft-ietf-lisp-pubsub-05.txt
> 	Pages           : 12
> 	Date            : 2020-03-18
> 
> Abstract:
>     This document specifies an extension to the use of Map-Request to
>     enable Publish/Subscribe (PubSub) operation for LISP.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-lisp-pubsub/
> 
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-lisp-pubsub-05
> https://datatracker.ietf.org/doc/html/draft-ietf-lisp-pubsub-05
> 
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-lisp-pubsub-05
> 
> 
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
> 
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