Re: [Sip] questions about drat-bjorkner-serviceroute-00


Henrik Gustafsson wrote:
> 
> The service route is actually a loose route and the chain of service
> routes could
> be considered as a chain of outbound proxies. We didn't like initial
> routing
> and filtering services to be visited for a all following request, that
> is the reason
> we stated a service-route SHOULD only be inserted in a initial request.
> If a
> service needs to keep the call state, you should add a record-route,
> like you do
> today.
>
So the chain of service-route headers is actually a set of application
servers in the originating domain, each responsible for a different
server?
> 
> Actually there is an error in the draft, the service route must also be
> added to
> the CANCEL.
> 
> If a message contains both route-headers and service-route-headers, it is a
> result of an error and the damage is minimized by just go for the route.
> 
I think this should be repeated in section 4.2. As the text is stated
now, section 4.2 says to go for the service-route header, at least that
s how I interpreted it.
>
> /Henrik Gustafsson
> 
> Timothy SOETENS wrote:
> 
> >Hi All,
> >
> >I have some questions regarding the draft
> >draft-bjorkner-serviceroute-00.txt.
> >
> >I think it is a good thing to route requests according to the service a
> >user is subscribed for, but still I am confused in how the service-route
> >header is used.
> >
> >1. "The service-route header should only be inserted in the first
> >request in a call leg." (4.1, page 4) Is it not possible that you first
> >contact the callee before deciding on which service to use?
> >
> >2. "If a request contians both route headers and service-route headers
> >the route headers MUST be used for request routing." (4.1, page 5)
> >Indeed, if the route headers are used for request routing, it is not
> >useful to insert service-route headers in the subsequent requests.
> >However, I have the feeling that service-route headers can be useful in
> >subsequent requests.
> >
> >Comments?
> >
> >Thanks,
> >Tim.
> >

-- 
Timothy Soetens
_________________________________________

From the Network Strategy Group @ Alcatel

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Fax  +32-3-240.48.88

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