Subject: [Sigtran] [Technical Errata Reported] RFC4666 (2065)

From: RFC Errata System <[email-masked]>
Date: Thu, 4 Mar 2010 22:27:59 -0800 (PST)

The following errata report has been submitted for RFC4666,
"Signaling System 7 (SS7) Message Transfer Part 3 (MTP3) - User Adaptation Layer (M3UA)".

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You may review the report below and at:
http://www.rfc-editor.org/errata_search.php?rfc=4666&eid=2065

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Type: Technical
Reported by: AMIR KHAN <[email-masked]>

Section: 3.8.2

Original Text
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The Notify message contains the following parameters:

      Status                     Mandatory
      ASP Identifier             Conditional
      Routing Context            Optional
      INFO String                Optional

Corrected Text
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The Notify message contains the following parameters:

      Status                     Mandatory
      ASP Identifier             Conditional
      Routing Context            Conditional <Changed>
      INFO String                Optional

Notes
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Considering the scenario below I think the Routing Context in Notify must be conditional.

If ASP1 is Actively processing traffic for both AS1(Override) and AS2(Loadshare) and another ASP2 of AS1 becomes ACTIVE. Then I think it becomes mandatory for SG to send Notify message ("Alternate ASP Active") with AS1 Routing Context. ASP1 will use this Notify (containing AS1 Routing Context) to become INACTIVE for AS1, without this AS1 Routing Context ASP1 will become INACTIVE for both AS1 and AS2, which is not desired here. 

Also please go through mailing list with subject line "M3UA Notification and Routing Context" for more on this.

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RFC4666 (draft-ietf-sigtran-rfc3332bis-06)
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Title               : Signaling System 7 (SS7) Message Transfer Part 3 (MTP3) - User Adaptation Layer (M3UA)
Publication Date    : September 2006
Author(s)           : K. Morneault, Ed., J. Pastor-Balbas, Ed.
Category            : PROPOSED STANDARD
Source              : Signaling Transport
Area                : Real-time Applications and Infrastructure
Stream              : IETF
Verifying Party     : IESG