RE: Changeover M3UA-M2PA

Pavel,

To give a more complete picture, let me add that this is exactly what
happens when a node goes down in SS7 network.

   Thanks,
   Tolga

> -----Original Message-----
> From: Haresign Lincoln [mailto:[email protected]]
> Sent: Thursday, February 22, 2007 11:32 AM
> To: pavel; [email protected]
> Subject: RE: [Sigtran] Changeover M3UA-M2PA
>
>
> Pavel,
>
> The connection between STPs is somewhat irrelevant in this scenario.
>
> And unfortunately there is no "change over procedure" in M3UA that
> includes retrieval with sequence numbers.  So...in the case of loss of
> an association, any messages that had been transmitted over SCTP, but
> not received on the remote end is lost.
>
> Regards,
> Lincoln
>
> -----Original Message-----
> From: pavel [mailto:[email protected]]
> Sent: Thursday, February 22, 2007 10:01 AM
> To: [email protected]
> Subject: [Sigtran] Changeover M3UA-M2PA
>
>
> I have the following scenario. Connection between STP-ASP is M3UA and
> between STP-STP M2PA.
> My question is which primitives must be exchanged in the case of the
> Changeover-Procedure, when one connection between STP-ASP is failed, to
> retransmit the messages over another STP.
>
> Pavel
>
>                                                       +-------+
>                                                        |  ASP  |
>                                                       +-------+
>                                                            |    |
>                                                         M3UA
>                                          _________|    |_________
>                                         |
>            |
>                                         |
>
>           |
>                                         |
>
>           |
>                                     +-------+
> +--------+
>                                     |SG/STP|------------------|SG/STP |
>                                     +-------+       M2PA
> +--------+
>                                         |
>            |
>                                         |
>            |
>
> |                                          |
>                                       SS7
>
>    SS7
>
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