[SIPForum-discussion] Strict routing

[aditya kumar]

Hi,
As u explained below on strict routing.Could u please write the header fields(request URI,Route,Record route) of requests and responses of attached call-flow. U can naming proxy address as u like and simply mention the header fields corresponding to the position(F1,F2...).So that's It can easily understand to everybody. Thanks,Adi              


Date: Wed, 5 Sep 2007 13:45:54 +0100From: suba_technical at yahoo.co.inSubject: Re: [SIPForum-discussion] Strict routingTo: adityaakumar at hotmail.com
Hi,
 
Whatever I know i will explain.
We can take the two cases.
 
1.Record route header with strict routing
2.Record route header with loose routing (or) route header with 'LR' parameter.
 
case :1
 
All the messages should be sent through proxy.from ua1 to p1 it should have 4 record route headers,3 of proxy address & 1 of useragent2's address with maddr parameter.once it reaches the corresponding proxy,it will remove it's address & forward it to the destination(ua2).
 
Regarding request uri,it should have the corresponding proxy's address.it is also depends upon stateful & stateless proxies(all).
 
case 2:
 
In this case,the message need not follow through proxy.
The request uri can be remote party's address.the same case as 1 but it has route header with lr parameter.
 
Regarding request uri:

The request URI value should be remote address (ua2 ) only when the Record-Route header value with proxy address has 'lr' parameter i.e only for loose routing. 
If 'lr' is not there then the corresponding proxy's address should be set in the request URI.
 
In additon I am attaching the call flow through proxy.if u go through that u can get some idea i guess.revert me in case of any issues.
 
---
Regards,
Subashini R.
 
aditya kumar <adityaakumar at hotmail.com> wrote:


 
Yes, I have already gone through the 16.12.1.2 of rfc, after that I shooted this mail...BCZ there was no clearly mentioned the header part and routing.In my mail I have clearly mentioned the specific items in bold letter what I wants rather than  theoretical definition.
 
Thanks,Adi


Date: Wed, 5 Sep 2007 17:20:44 +0800From: deepanshu at huawei.comSubject: Re: [SIPForum-discussion] Strict routingTo: adityaakumar at hotmail.comCC: discussion at sipforum.org


You can refer to RFC3261 section number 16.12.1.2
 
This section gives an exmaple exactly same as what you mentined. 

----- Original Message ----- 
From: aditya kumar 
To: discussion at sipforum.org 
Sent: Wednesday, September 05, 2007 2:12 PM
Subject: [SIPForum-discussion] Strict routing

Hi All,
 
As per my knowledge Strict routing means: Which proxy address is strictly mention in the record route, the request must follow that record route and to reach the destination point.
 
So here My query is on the call-flow:
Let's take one example:UA1->p1->p2->p3-UA2
Out of the above flow, Proxy P2 address is strictly mention in the record route (strict router) then how the call is routing.
Here, I would like to know more specific about the Requests and response of header part (Not all header fields, only need of request URI, route and Record route header field of req and response)
 
Kindly guidance me to resolve this problem.
 
Thanks,
Adi
 

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