Re: [Dots] [IANA #1181897] expert review for draft-ietf-dots-signal-call-home (service-names-port-numbers)

Unique ports were assigned in the past for NETCONF/RESTCONF call home, see https://tools.ietf.org/html/rfc8071#section-6 

-Tiru

> -----Original Message-----
> From: Dots <dots-bounces@ietf.org> On Behalf Of
> mohamed.boucadair@orange.com
> Sent: Friday, November 13, 2020 1:36 PM
> To: dots@ietf.org; Benjamin Kaduk (kaduk@mit.edu) <kaduk@mit.edu>
> Subject: [Dots] TR: [IANA #1181897] expert review for draft-ietf-dots-signal-
> call-home (service-names-port-numbers)
> 
> CAUTION: External email. Do not click links or open attachments unless you
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> 
> Hi All,
> 
> We received this reply from the port expert.
> 
> We do have an appendix that explains why we do need a port number:
> demux two distinct services (one to handle mitigation and another one to
> request mitigations). When a DTLS connection is received, the node hosting
> both the base and call home has no means to determine which role it needs
> to proceed with.
> 
> I'm not sure how we can follow the suggestion to "use two different
> messages on the same port" especially that we don't define the transport
> but rely upon existing ones.
> 
> Unless there are other tweaks not already discarded in the past, I suggest we
> maintain our request.
> 
> Thoughts?
> 
> Cheers,
> Med
> 
> -----Message d'origine-----
> De : Sabrina Tanamal via RT [mailto:drafts-expert-review@iana.org]
> Envoyé : jeudi 12 novembre 2020 23:43
> Cc : kondtir@gmail.com; BOUCADAIR Mohamed TGI/OLN
> <mohamed.boucadair@orange.com>; supjps-ietf@jpshallow.com;
> valery@smyslov.net; frank.xialiang@huawei.com; rdd@cert.org;
> kaduk@mit.edu Objet : [IANA #1181897] expert review for draft-ietf-dots-
> signal-call-home (service-names-port-numbers)
> 
> Dear Authors,
> 
> We have a response from the IESG-designated port expert:
> 
> I do not see sufficient reason for a second port assignment to be made for
> this single system. At best, they should just use two different messages on
> the same port.
> 
> This request should not be considered in isolation; it is coupled to
> https://tools.ietf.org/html/draft-ietf-dots-server-discovery.
> 
> One service, one port.
> 
> ===
> 
> Best regards,
> 
> Sabrina Tanamal
> Senior IANA Services Specialist
> 
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