RE: Recommendation for SUA modifications

Brain,

[brian] Nevertheless, Lincoln seems to be avoiding this question,
perhaps you can venture an answer: "How does the SG know what address to
place in the OPC of the message if it receives an SUA message (SCON or
otherwise) from the ASP that does not include a corresponding point code
in the message?"

Easy answer (didn't know I was avoiding it).  If you are referring to
the PC in the MTP label, it depends on the routing keys of the ASP.  I
can elaborate on this further if you'd like.

Regards,
Lincoln



-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Brian F. G. Bidulock
Sent: Wednesday, October 12, 2005 7:08 PM
To: Tolga Asveren
Cc: [email protected]
Subject: Re: [Sigtran] Recommendation for SUA modifications

Tolga,

Tolga Asveren wrote:                             (Wed, 12 Oct 2005
14:34:27)
> > That would be sending messages with RC 1 in them before receiving 
> > ASP Active Ack for RC 1.  That passage does not speak to the 
> > addressing of the messages.
> > Other passages do.  The SG provides uniform connectivity to all ASPs

> > in an AS and can route any messagew within a Network Appearance.
> [TOLGA]Here I still think different, i.e. I consider AS state to be 
> honored in both directions of message flow based on the above
passage-.

That is true enough for MTP/M3UA, but for SCCP/SUA the responding
address (in a connection response) is not necessarily the address to
which the connection request was sent.  SUA has the ability for relay
internal to the ASP or over the IP network, that we precluded in the
M3UA RFC.

Following your stricter interprentation would require, for connection
oriented operation, when the responding address differs from the address
of the request, of responsding to a connection request using an RC
differennt from that upon which the connection request arrived.

Nevertheless, Lincoln seems to be avoiding this question, perhaps you
can venture an answer: "How does the SG know what address to place in
the OPC of the message if it receives an SUA message (SCON or otherwise)
from the ASP that does not include a corresponding point code in the
message?"

Remember that Lincoln says that his ASPs register only using GT (or
maybe SSN) with no point code, therefore there is no point code in the
routing key associated with the routing context and that, if I interpret
him correctly, that it is too difficult a provisioning task for his ASP
to provide one at registration.

For arguments sake, assume that the SG supports mutliple point codes
(otherwise the task is trivial).

--brian

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

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