[afnog] Re: Request for input: The Working Group on

[ALAIN PATRICK AINA]

> H323
> The initial intent of H.323 was for the support of LANs, so it was not
> inherently designed for wide area addressing. The concept of a zone was
> added to accommodate wide area addressing.  Procedures are defined for
> "user location" across zones for email names. Annex G defines communication
> between administrative domains, describing methods to allow for address
> resolution, access authorization and usage reporting between administrative
> domains. In multi-domain searches, there is no easy way to perform loop
> detection. Performing the loop detection can be done (using the PathValue
> field), but introduces other issues related to scalability.
>
> SIP
> SIP inherently supports wide area addressing. When multiple servers are
> involved in setting up a call, SIP uses a loop detection algorithm similar
> to the one used in BGP, which can be done in a stateless manner, thus
> avoiding scalability issues. The SIP Registrar and redirect servers were
> designed to support user location
> </Quote>

Not surprizing. ITU works  towards  centralized environnement when IETF works 
for  a decentralized system.

Their history and origin could explained that. But may be that they have 
understood and i think it is where robert must convince us.


--alain