[Users] keep alive using RE-INVITE

[Bogdan-Andrei Iancu]

Hi Javier,

this is quite impossible to do - by sending re-INVITEs from a middle 
point, you will break the CSEQ consistency between the end points. 
Within the dialog, the cseq must increase from message to message - if 
you send a re-invite to point A with cseq n+1, after a while point B may 
sent a request with the same cseq since it was not aware that some party 
in the middle changed the number.

the best way to do it is if you have a end2end keepalive mechanism as 
Session-Timer.

regards,
bogdan

Javier Ramirez wrote:

> Hi !
> I looking for a mechanism to keep alive, and I see that is used the 
> RE-INVITE, but
> How to use the Re-INVITE to a keep alive mechanism ?
> exist another way to implement another keep alive mechanism ?
>  
> best regards
> Javier ramirez
>
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