Re: Need ANSWER 4 these QUERIES !!

Hello Brian,

can you point out a statement in the M3UA RFC that does not allow
having more than one association between two signalling processes,
especially considering the fact that ASP ID is an optional parameter.
Moreover, there is no explicit statement that does not allow having
several SCTP endpoints in one signalling process.

Therefore, it looks like the RFC allows having multiple SCTP
associations between two signalling processes, although it is
non-sense.


Regards

/Ilie


On 11/15/06, Brian F. G. Bidulock <[email protected]> wrote:
> Mahantesh,
>
> Please see comments below...
>
> Mahantesh wrote:                     (Wed, 15 Nov 2006 17:38:38)
> >
> >    Hi there,
> >
> >     1.      What is a Routing Context [RC] and why it is required, when a
> >        Routing Key [RK] serves the purpose?
>
> Because an RK is a large thing with difficult decoding and the
> RC is a simple 32-bit number.  Because RC is used in every
> message in the main data flow, it increases peformance and
> throughput.
>
>
> >     2.     Whether 2 Application Servers [AS] can have the same RK?
>
> No they cannot.  There is a 1:1:1 relationship between AS:RC:RK.
> Grep the RFC for unique.
>
> >     3.     What's the main purpose of Network Appearence [NA] ?
>
> To define the format and numbering space for signalling point
> codes when the SG supports multiple signalling point code
> formats or numbering spaces and the 32-bit signalling point code
> value is not sufficient to distinguish between two signalling
> points.  See definition RFC 4666 bottom of page 7.
>
> >     4.     How many Associations are possible between SG and AS?
>
> Zero.  An SG does not form associations to an AS: SGPs form
> associations to ASPs.
>
> Between an SGP and an ASP?  Zero or one.  Two is not permitted.
> If a second connection is attempted to an SGP and the SGP knows
> that it is the same ASP (from the remote or local IP address(es)
> and port and configuration) it should refuse the connection.  If
> it cannot determine the ASP identity (or uniqeness) from these
> parameters, it will require an ASP Id.  If a ASP Up is received
> on two associations with the same ASP Id, the second should be
> refused with error Invalid ASP Id.  Note that an ASP or an SGP
> is not a piece of hardware or an IP host (although they are
> drawn that way in the examples), it can be a process or
> sub-process within a host.  As such, one host can represent
> multiple ASPs, but each must have only one association to each
> SGP.
>
> >     5.     How many ASPs can be in an AS? and why?
>
> Zero to unlimited.  Because no minimum or maximum is placed on
> this number by the RFCs.  For a loadsharing AS, there is usually
> a practical limit to the number of ACTIVE ASP in an AS (the range
> of the load sharing key, but, depending in the loadsharing key
> that number could still be very large).
>
> --brian
>
>
> --
> Brian F. G. Bidulock
> [email protected]
> http://www.openss7.org/
>
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-- 
Ilie