Re: [Sip] Dual registration without Outbound

["Christer Holmberg" <christer.holmberg at ericsson.com>]

Hi, 

>>And, as you say, the edge proxies may be "access network dependent",
so it may not even be possible to e.g. register the 
>>wlan contact via the 3g edge proxy, etc.
>
>So you are saying that the contact addresses are themselves access
network dependent??? So that the ip address of the 
>contact is only accessible via a particular access network and proxy?
>
>This *really* isn't the internet, is it!!!

I am not sure I understand. Typically each access network assigns IP
addresses to the UA independent from each other. The wlan network has a
no idea what IP address the 3g network assigns to the UA, and vice
versa.

Regards,

Christer



> Regards,
> 
> Christer
> 
> 
> 
> 
> 
> 	Thanks,
> 	Paul
> 
> Christer Holmberg wrote:
>> Hi,
>>
>>  > So, you want to register both contacts to both registars, right?
>>  >
>>  > Example:
>>  >
>>  > UA_Contact_wlan ----- OB_1 ----- REG_1  > UA_Contact_wlan -----
>> OB_1 ----- REG_2
>>  > UA_Contact_3g   ----- OB_2 ----- REG_1
>>  > UA_Contact_3g   ----- OB_2 ----- REG_2
>>
>>> no, like this:
>>  > UA_Contact_wlan ----- OB_1 ----- REG_1  > UA_Contact_wlan -----
>> OB_2 ----- REG_2
>>  > UA_Contact_3g   ----- OB_1 ----- REG_1
>>  > UA_Contact_3g   ----- OB_2 ----- REG_2
>>
>> Now, in your example, if OB_1 and REG_2 fail you don't still don't 
>> have redundancy :)
>>
>>> if outbound does not mandate that UA must register each contact with
>> both ob proxies, my pleasant surprise was a too
>>> early one and ob draft falls back to the useless bin.
>> I don't have the spec in front of me, but I don't think it currently 
>> talks about multiple contacts.
>>
>> I guess this all comes back to Dean's question whether we need some 
>> new text into the draft.
>>
>> In order to avoid delaying the Outbound spec even more, I guess it 
>> could also be an extension draft:"Outbound with multiple contacts", 
>> or
> 
>> something like that...
>>
>> Regards,
>>
>> Christer
>>
>>
>>
>>
>>
>> -- juha
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>>
> _______________________________________________
> Sip mailing list  https://www.ietf.org/mailman/listinfo/sip
> This list is for NEW development of the core SIP Protocol Use 
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> 
_______________________________________________
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