Re: [mdnsext] mdnsext & SLP

Garret Peirce <peirce@maine.edu> Fri, 21 June 2013 16:15 UTC

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Date: Fri, 21 Jun 2013 12:15:27 -0400
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From: Garret Peirce <peirce@maine.edu>
To: Michael Sweet <msweet@apple.com>
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Subject: Re: [mdnsext] mdnsext & SLP
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Michael,

I had thought the purpose of an SLP DA was to enable SD across subnet
boundaries.
The idea being there could be a number of them setup for different reasons
(ex. organizational/serviced scoped).
ref: RFC2608 section 12.





On Fri, Jun 21, 2013 at 11:26 AM, Michael Sweet <msweet@apple.com> wrote:

> Garret,
>
> On Jun 21, 2013, at 11:05 AM, Garret Peirce <peirce@maine.edu> wrote:
>
> I'm curious why SLP is not a potential solution to the hurdle of 'service
> discovery beyond the local link'.
>
>
> Speaking from experience, SLP is painful without a DA, and you need an
> accessible DA on every network segment.
>
> Ignoring client support for the moment, SLP seems like an existing,
> defined mechanism for scalable SD.
>
>
> AFAIK, SLP does not solve the multiple-network problem.
>
> It seems this draft aims to develop an alternate method to do so.
>
>
> Well, I think the goal is to come up with a solution to the
> multiple-network problem that scales while retaining dynamic
> registration/advertising of services.  The focus may be on mDNS and DNS-SD
> (because that drove the petition to fix things...) but I suspect that
> solutions for DNS-SD and mDNS would also work for extending SLP.
>
> _________________________________________________________
> Michael Sweet, Senior Printing System Engineer, PWG Chair
>
>


-- 
Garry Peirce
Network Architect
Networkmaine, University of Maine System
1-207-561-3539