MEGACO Wayne Cutler Internet Draft Marconi Communications Document: July 2000 Category: Informational MGC Recovery Package for Megaco/H248 Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026 [1]. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet- Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. 1. Abstract This documents provides a proposed definition for a supplemental package to Megaco/H.248. The proposed package addresses support of functionality to enable a MGC to store information on a MG which can subsequently be retrieved thereby facilitating the appropriate (MGC) recovery action in the event of a MGC restart. 2. Conventions used in this document The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC-2119 [1]. Cutler Expires January 2001 1 MGC Recovery Package for Megaco/H248 July 2000 3. MGC Recovery Package Package ID: mgcrecv (0x????) Version : 1 Extends: None This package defines a property to enable the MGC to store information on a MG. The information is stored in relation to an active MG connection. In the event of an MGC restart, the MGC will retrieve the stored information in order to facilitate its recovery action. The stored information is treated by the MG as an opaque digit string. 3.1 Properties MGC Recovery Information Property ID û recvinfo (0x0001) Type û 1*64 (HEXDIG) Possible Values û Any, as defined by the MGC Defined in û Local Control Descriptor Characteristics û Read/Write 3.2 Events None. 3.3 Signals None. 3.4 Statistics None. 3.5 Procedures Whenever the MGC requests a connection at a MG, the MGC should stored away its recovery information. The stored information may be subsequently updated at will by the MGC during the lifetime of a given MG connection. Subsequent to a MGC failure, the audit mechanism would be used to obtain the stored information to facilitate MGC recovery action. 4. Formal Syntax As in [4], the package described in this draft may be encoded as ASN.1 or augmented Backus-Naur Form (BNF) [3]. Cutler Expires January 2001 2 MGC Recovery Package for Megaco/H248 July 2000 5. Security Considerations Not applicable for this draft. Refer to [4]. 9. References 1 Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997 3 Crocker.D & Overell.P (editors), "Augmented BNF for Syntax Specifications: ABNFö, RFC 2234, November 1997. 4 Cuervo et al, "Megaco Protocol", draft-ietf-megaco-protocol- 07.txt, (work in progress), April 2000. 10. Acknowledgments 11. Author's Addresses Wayne Cutler Marconi Communications New Century Park Coventry CV3 1HJ England Phone: +44 24 76562417 Email: wayne.cutler@marconi.com Cutler Expires January 2001 3 MGC Recovery Package for Megaco/H248 July 2000 Full Copyright Statement "Copyright (C) The Internet Society (date). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implmentation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into Cutler Expires January 2001 4