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Re: [dnssd] Last Call: <draft-ietf-dnssd-requirements-04.txt> (Requirements for Scalable DNS-SD/mDNS Extensions) to Informational RFC

2015-03-03 19:08:49
On 3 Mar, 2015, at 17:03, David Farmer <farmer(_at_)umn(_dot_)edu> wrote:

The original wording at least implied some level of interoperability, I'm not 
sure "leverage and build upon" does that.  It sound more like code reuse is 
important rather than interoperability.

   REQ5:   SSD should inter-operate with current link scope
           DNS-SD/mDNS protocols and deployments to the extent
           practicable.

I think my answer to the question is bidirectional would be the best case.  
But, remember these are competing requirements to be balanced. So, in the 
worst case ships-in-the-night meets REQ5 and REQ6.

No, it’s more device reuse than code reuse. You shouldn’t have to buy a new 
printer to use it with SSD. Or new network cameras, home thermostats, etc.

No it’s not a bidirectional requirement. It’s unidirectional:

A modern client needs to be able to discover a ten-year-old printer even when 
it’s remote.

The ten-year-old printer doesn’t need to discover anything new.

Stuart Cheshire