Re: [Sipping] P2P why not DNS for discovery?

[Brijesh Kumar <kumarb at research.panasonic.com>]

Juha:

----- Original Message -----
From: Juha Heinanen <jh at tutpro.com>
Date: Wednesday, February 2, 2005 9:21 pm
Subject: [Sipping] P2P why not DNS for discovery?

> there must be some ery good reasons for inventing all those new p2p
> protocols we have read on this mailing list, but i would still 
> like to
> hear why an existing protocol, namely DNS, is not good for discovery?

DNS is good for discovery, but is it P2P?

P2P applications need to  run without relying on centralized servers in networking 
infrastructure. So, clearly the use of centralized DNS to resolve does't fullfill 
that requirement. Actually, there is a project called Distributed DNS which is 
a P2P version of DNS based on DHT. While P2P based DNS is useful idea, it is
is n't designed or meant to replace sip registrar function. The efficiency of
DHT based search, makes P2P sip a good proposition to explore.

> my sip uri is sip:jh at tutpro.com.  if someone wants to get my contact
> information, they could simply make a sip srv query on jh.tutpro.com,
> which my sip ua is keeping up to date via dynamic dns updates either
> directly or indirectly using xmlrpc, for example.
> 
> what is wrong with this kind of DNS approach?

Nothing wrong. But, this clearly is not P2P approach being
pursued in P2P SIP. 

cheers,

--bk

> 
> -- juha
> 
> _______________________________________________
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> 


_______________________________________________
Sipping mailing list  https://www1.ietf.org/mailman/listinfo/sipping
This list is for NEW development of the application of SIP
Use sip-implementors at cs.columbia.edu for questions on current sip
Use sip at ietf.org for new developments of core SIP