Re: M3UA notify message

Tolga,

Tolga Asveren wrote:                                                 (Wed, 22 Feb 2006 14:54:42)
> Barry,
> 
> > -----Original Message-----
> > From: Barry Nagelberg [mailto:[email protected]]
> > Sent: Wednesday, February 22, 2006 3:06 PM
> > To: [email protected]
> > Subject: RE: [Sigtran] M3UA notify message
> >
> >
> > Brian,
> >
> > The AS state is just the combinatorial sum of the ASP states.
> >
> > So I don't think that it makes sense to say that "each SGP
> > maintains its own ASP state, but that AS state is shared
> > across the SGPs making up an SG" - this falls apart as soon as
> > the ASP states differ on the SGPs.
> >
> > Futhermore, "ASP state" doesn't exist in a vaccuum. Each ASP has
> > a separate state in each AS to which it belongs. So I
> > think that the management of both AS and ASP states must be done
> > at the same level - either at the SG or the SGP level.
> >
> > So the next logical question is: "At which level"? I think that
> > we have a big problem here. There are conflicting
> > answers in the RFC (draft-ietf-sigtran-rfc3332bis-06.doc). I
> > think that we urgently need to get rid of these
> > contradictions.
> >
> > Those in favor of maintenance at the SG level can point to the following:
> >
> > >From section 1.4.1
> > <snip>
> >    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.
> > <snip>
> [TOLGA]This section is about Signalling Point Code Representation. To give
> the SG-wide unique view for the SPMC, one needs to coordinate AS/ASP states,
> but IMO this does not mean running a single ASP/AS state machine from M3UA
> procedures point of view, e.g. AS:PC=1-1-1, and there are two SGPs in the
> SG. Unless AS is INACTIVE in both of them, SPMC will be AVAILABLE but each
> SGP is running its own ASP state machine and following M3UA procedures
> independently. The result of a such coordination could be considered as the
> "global ASP state" but I think it shouldn't affect M3UA procedures between
> SGP and ASP.

Read the thread "AS state machine sharing between SGPs".

--brian

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