Re: Changeover M3UA-M2PA

pavel,

That is correct.  When the association SG1-ASP fails, SG1 force reroutes
traffic destined for the ASP to SG2 over C-links (M2PA).  When redirecting
traffic to an alternate route in this fashion, Q.704/Clause 13 requires that
SG1 send TFP to SG2 with respect to the ASP's point code.  Also, if the
network supports the transfer restricted national option, TFR is sent to
the SEP with respect to the ASP's point code indicating that it is more
efficient for the SEP to route messages destined for the ASP directly
via SG2.  But this is normal SS7 operation.

--brian

pavel wrote:                                      (Sun, 25 Feb 2007 17:20:20)
> Brian,
> 
> thanks for your answer.
> 
> i.e. if one ss7 SEP communicate with ASP and association to ASP is 
> broken, then SG1 must send the TFP-Message
> to SEP, when no alternative ways on SG1 to ASP more exists. As response 
> activate the SEP rerouting to ASP over
> SG2 (Forced rerouting).
> But the SG1 have an alternate route to ASP (e.g. over SG2), the 
> following trafic must be transporeted on this route.
> Please correct me.
> 
>                +-------+
>                |  ASP  |
>                +-------+
>                  |    |
>                   M3UA
>         _________|    |_________
>        |                        |
>        |                        |
>        |                        |
>    +-------+                +--------+
>    |  SG1  |----------------|   SG2  |
>    +-------+      M2PA      +--------+
>        |                     /    
>        |                    /     
>        |  _________________/
>        | /
>        |/
>    +-------+ 
>    |SS7 SEP|                   
>    +-------+
> 
> 
> Regards,
> pavel
> 
> 
> 
> Brian F. G. Bidulock schrieb:
> > pavel,
> >
> > Actions taken with regard to the association, both at the ASP and the
> > SG, equivalent to the sequenced changeover procedure of Q.704/Clause 5
> > are described in Section 1.5.1.2 (SPP Diverting peer SPP Traffic) of this
> > draft:
> >
> >  http://www.ietf.org/internet-drafts/draft-bidulock-sigtran-corid-05.txt
> >
> > With regard to the interaction between STPs, the normal forced rerouting
> > actions are taken per the likes of Q.704/Clause 7 (Forced rerouting).
> >
> > --brian
> >
> > On Thu, 22 Feb 2007, pavel wrote:
> >
> >   
> >> 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
> >>
> >> _______________________________________________
> >> Sigtran mailing list
> >> [email protected]
> >> https://www1.ietf.org/mailman/listinfo/sigtran
> >>     
> >
> >   

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