Re: Comment on draft-roach-sipcore-rfc3265bis-00

Adam Roach wrote:

> Because of the true interoperability 
> nightmare that has resulted from dialog sharing, my suggestion would be 
> to disable notifier functionality on those endpoints under such 
> circumstances (perhaps with an implementation option to fall back to 
> 3265 behavior for the truly masochistic).

Can you say more about the "true interoperability nightmare that has 
resulted from dialog sharing"?

I understand that there undoubtedly are interop issues due to some UAs 
not supporting dialog sharing. There are also interop issues due to the 
UAs not supporting an event package, or not supporting GRUU, or 
whatever. Is one more of a nightmare than another?

Dialog sharing has been a legal possibility since 3261 was published. So 
it shouldn't be a surprise to anybody. If somebody didn't implement 
support, well, what can you say?

It was used primarily because contacts in dialogs often don't have the 
gruu property, and GRUU hasn't been widely implemented. Has that 
situation changed? Will 3265bis somehow result in widespread 
implementation of GRUU by registrars?

	Thanks,
	Paul
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