[prev in list] [next in list] [prev in thread] [next in thread] 

List:       sip-implementors
Subject:    Re: [Sip-implementors] SIP REGISTER MESSAGE flow
From:       Arun Tagare <arun.tagare5 () gmail ! com>
Date:       2021-11-30 5:43:15
Message-ID: CACSDmUJ3fBa9PWZ36G3QVEp4XBFpVzBNRSMBy0qCxkOKvwtW9g () mail ! gmail ! com
[Download RAW message or body]

Hi Ankur,

Sure will review the RFC
Thanks for you reply

On Tue, 30 Nov 2021 at 11:00 AM, ankur bansal <abh.ankur@gmail.com> wrote:

> @arun.tagare5@gmail.com <arun.tagare5@gmail.com>
> Please check RFC 5626 3.3
> <https://datatracker.ietf.org/doc/html/rfc5626#section-3.3>. Multiple
> Connections from a User Agent
> I believe you might find your answers here in this RFC which explains
> about creating multiple flows
>
> Regards
> Ankur Bansal
>
> On Sat, Nov 20, 2021 at 10:27 AM Arun Tagare <arun.tagare5@gmail.com>
> wrote:
>
>> Thanks Ranjit & Paul,
>>
>> Yes, NW can send ‘n' number of PCSCF addresses,
>>
>> Yes, agree Ranjit it's may be not practical but just wanted to understand
>> if that is allowed? Or Nw accepts REG in sequence like
>>
>> Reg to 1 PCSCF
>> Fail/error response from NW
>> Then retry on 2PCSCF address
>> Fail/error response from NW
>> Then retry on 3rd PCSCF address
>> Success from NW
>>
>> So, here UE is Registered success on 3rd PCSCF address.
>>
>> So, my question is it allowed to send Registration request to all received
>> PCSCF at the same time?
>> and assume UE registered on the 1 success response from NW and ignore
>> remaining. I m correlating Registration flow with INVITE forking responses
>> scenario here.
>>
>> Please let me know if it allowed?
>>
>>
>> On Sat, 20 Nov 2021 at 10:44 PM, Ranjit Avasarala <ranjitkav12@gmail.com>
>> wrote:
>>
>> > Hi Arun
>> >
>> > I am not sure how you can get more than 1 P-CSCF address(s) as the
>> P-CSCF
>> > address is discovered by UE i.e returned by GGSN.  So even if we assume
>> a
>> > scenario where the GGSN returns 5 P-CSCF address, then yes u can send
>> > REGISTER to all of them ( but this is not a practical scenario)
>> >
>> > Then as per the protocol, all 5 P-CSCFs will respond with 401 and the UE
>> > needs to keep track of all 5 401s and send REGISTER with authentication
>> to
>> > all of them. Then if we assume all of them accept then UE is
>> simultaneously
>> > registered with 5 P-CSCFs
>> >
>> > so though theoretically this may seem possible, but should not and will
>> > not occur in a practical scenario
>> >
>> > To understand more about P-CSCF discovery refer to 3GPP TS 34.229
>> >
>> > Regards
>> > Ranjit
>> >
>> > On Sat, Nov 20, 2021 at 1:00 AM Arun Tagare <arun.tagare5@gmail.com>
>> > wrote:
>> >
>> >> Hi Team,
>> >>
>> >> Need some info, can UE be allowed (as per rule) to send SIP REGISTER
>> >> requests to all the received P-CSCF addresses from NW (during attach) ?
>> >>
>> >> For Ex.
>> >> If UE received 5 P-CSCF address during attach
>> >>
>> >> Is it allowed to send REG to address at the same time
>> >> UE REG to P-CSCF-1--->
>> >> UE REG to P-CSCF-2--->
>> >> UE REG to P-CSCF-3--->
>> >> UE REG to P-CSCF-4--->
>> >> UE REG to P-CSCF-5--->
>> >>
>> >> <--- 401 from P-CSCF-2
>> >> <--- 401 from P-CSCF-3
>> >> <--- 401 from P-CSCF-5
>> >>
>> >> UE AUTH-REG to P-CSCF-2--->
>> >> UE AUTH-REG to P-CSCF-3--->
>> >> UE AUTH-REG to P-CSCF-5--->
>> >>
>> >> <-- 200 OK from P-CSCF-5
>> >>
>> >> So, UE finally connected to P-CSCF-5
>> >> I know this may increase signalling load on NW, but want to understand
>> is
>> >> this flow allowed as per rules ? Or there are any restrictions please
>> help
>> >> on understanding
>> >>
>> >>
>> >>
>> >> --
>> >>
>> >> With Regards
>> >>
>> >> Arun A. Tagare
>> >> +91 9449 029729
>> >> _______________________________________________
>> >> Sip-implementors mailing list
>> >> Sip-implementors@lists.cs.columbia.edu
>> >> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
>> >>
>> > --
>>
>> With Regards
>>
>> Arun A. Tagare
>> +91 9449 029729
>> _______________________________________________
>> Sip-implementors mailing list
>> Sip-implementors@lists.cs.columbia.edu
>> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
>>
> --

With Regards

Arun A. Tagare
+91 9449 029729
_______________________________________________
Sip-implementors mailing list
Sip-implementors@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors

[prev in list] [next in list] [prev in thread] [next in thread]