Re: DUNA applies to SG as a whole

Ilie,

Ilie Glib wrote:                                                      (Fri, 06 Jan 2006 10:39:00)
> Hello Folks
> 
> Let's consider an SG with multiple SGPs.
> 
> RFC 3868 says (1.2.2.  Terminology)
> 
>    Where an SG contains more than one SGP, the
>    SG is a logical entity and the contained SGPs are assumed to be
>    coordinated into a single management view to the SS7 network and to
>    the supported Application Servers.
> 
> I interpret this statement so that SGPs of the same SG have identical
> connectivity to SS7 NW, in particular DUNA, DAVA messages sent from
> one SGP apply to all SGPs of this SG. Thus if an SGP sends a DUNA to
> an ASP, the ASP assumes that Affected SPC is unavailable through the
> SG, and this applies to all SGPs in the SG.
> 
> section 3.4.1.  of SUA RFC says
> 
> 3.4.1.  Destination Unavailable (DUNA)
> 
>    The DUNA message
>    is sent from the SG or relay node to all concerned ASPs (servicing
>    SCCP-users considered local to the SG or relay node, see chapter
>    1.3.1.1), when a destination or SCCP-user has become unreachable. The
>    SUA-User at the ASP is expected to stop traffic to the affected
>    destination or SCCP-user through the SG or relay node initiating the
>    DUNA.
> 
> Here SG is mentioned. Thus in case of multiple SGPs DUNA applies to SG
> as a whole. The same is valid for DUPU, and DAVA.
> 
> Is this reading of the RFC statements correct?

Yes.

--brian

> 
> thank you in advance
> 
> 
> --
> Ilie
> 
> _______________________________________________
> Sigtran mailing list
> [email protected]
> https://www1.ietf.org/mailman/listinfo/sigtran

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