Inline. manoj mallik wrote:
>Well this again raises couple of doubts in my mind, as described below; >In case of Preconfigured route:- >1. The Route should contain the URI of next Hop or remote target or any one >of these two? what is actually recommended? >2. What should the behavior of the Proxy if Route header in INVITE is set to >next Hop(which is the address of the Proxy itself) >3. What should be the behavior of the Proxy if Route header in INVITE is set >to remote target or some other address? >4.Lets consider the call is between: > UserA---Proxy---UserB >UserA send a INVITE with preconfigured Route. so lets say the INVITE will >contain the Route header that contains the address of next Hop(i.e of >Proxy). But the Proxy doesn't want to see all messaging thru out the call, >So the proxy doesn't include Record-Route in INVITE while sending it to the >dest. UA(i.e to User B). >So as consequence, there will be no Record-Route in 18x and 200 Response >from User B. >Now my doubt is > i. will this ACK,will Contain Route Header or not? if yes, then what will >be its Value? will be same as that present in INVITE or there will be no >Route in ACK in this case?? > ACK will not contain Route header, since the routeset that UserA creates on reception of 2xx would be empty. > ii. the ACK which be sent to UserB directly from UserA or thru the proxy > ACK will be sent directly to UserB. > >5. The following doubt is related to when there are multiple proxies are >involved in the call:- >Lets consider the call is between: > UserA---Proxy1---Proxy2---UserB >In the above scenario, UserA includes a Route header(case-1:Route contains >only pxy1-ipaddr, case-2: Route contains both pxy1 and pxy2 ipaddr) in >initial INVITE. This time PXY-2 inserts Record-Route in INVITE where as >PXY-1 doesn't. So PXY-2 will see all messages thru out the call and hence >there will be Record-Route in 18x and 200-OK messages which is the address >inserted by PXY-2. > >Now my doubt is > i. In ACK, what will be the value of the Route header? will be same as that >present in INVITE or as the Record-Route value received in 200-OK?? > In this case, the routeset would have one element i.e PXY-2. There will be a single Route header. What it contains depends on whether PXY-2 is a loose/strict router. If PXY-2 is a loose router, then Route header would be the uri of PXY-2 itself. If PXY-2 is a strict router, then Route header would be the uri of UserB. > ii. So in this case, the ACK which be sent directly to PXY-2 from User A or >to the PXY-1 > ACK would be sent to PXY-2. > >Can somebody throw lights on these above queries w.r.t strict and loose >routing as well. >Thank you all. >Regards, >Manoj > > > >
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