Re: M3UA notify message

Tolga,

The concensus, to which you agreed, was that each SGP maintains
its own ASP state, but that AS state is shared across the SGP
making up an SG.  That is, when notification of AS state is given,
it is consistent for all SGP in the SG.

If this were not the case, each SGP would form its own SG.  Part
of the fundamental purpose of an SG is to coordinate AS state,
both towards the SS7 network and towards the ASPs serving an AS.

This is, indeed, as Nitin indicates, reflected in section 1.4.1.

See the thread "[M3UA] AS state maching sharing between SGPs" from
May of 2001 for reference.

Therefore, when the AS state changes (on this SG-wide basis), all
ASPs attached to all SGP in the SG are notified.  This is why I
say that ASP2 is notified by SGP2 in the original question.

--brian

Tolga Asveren wrote:                                                 (Wed, 22 Feb 2006 09:10:52)
> Prabind,
> 
> > -----Original Message-----
> > From: [email protected] [mailto:[email protected]]
> > Sent: Wednesday, February 22, 2006 9:19 AM
> > To: [email protected]
> > Cc: [email protected]
> > Subject: RE: [Sigtran] M3UA notify message
> >
> >
> > Nitin,
> > Refer to section "1.4.1 Signalling Point Code Representation". It
> > clearly says:
> > "Where an SG contains more than one SGP, the MTP3 routeset, SPMC and
> >    remote AS/ASP states of each SGP SHOULD be coordinated across all the
> >    SGPs.  Rerouting of traffic between the SGPs MAY also be supported.:
> > "
> [TOLGA]This section refers to aggragating the unique SPMC view and
> supporting the implementation dependent internal routing functionality.
> State machines are kept per SGP.
> 
> 4.3 AS and ASP/IPSP State Maintenance
> 
>    The M3UA layer on the SGP maintains the state of each remote ASP, in
>    each Application Server that the ASP is configured to receive
>    traffic, as input to the M3UA message distribution function.
>    Similarly, where IPSPs use M3UA in a point-to-point fashion, the M3UA
>    layer in an IPSP maintains the state of remote IPSPs.
> > Since SGP2 will know what SGP1 has, it will send notifications to ASP.
> >
> > Regards,
> >
> > Prabind
> >

-- 
Brian F. G. Bidulock
[email protected]
http://www.openss7.org/