Network Working Group M. Chen Internet-Draft L. Zheng Intended status: Standards Track Huawei Technologies Co., Ltd Expires: November 13, 2011 May 12, 2011 ITU Carrier Code (ICC) Attachment Individual Identifier (AII) draft-chen-pwe3-mpls-tp-aii-icc-00.txt Abstract This document defines a new Attachment Individual Identifier (AII) type which could be used when ITU Carrier Code (ICC) is used as the provider's globally unique identifier (Opr_ID). The new AII (ICC AII) consists a ICC, a prefix and a AC ID field. Requirements Language 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 [RFC2119]. Status of this Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. 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." This Internet-Draft will expire on November 13, 2011. Copyright Notice Copyright (c) 2011 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents Chen & Zheng Expires November 13, 2011 [Page 1] Internet-Draft ICC AII May 2011 carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. ICC AII . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1. Procedures . . . . . . . . . . . . . . . . . . . . . . . . 4 3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4 4. Security Considerations . . . . . . . . . . . . . . . . . . . . 4 5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 4 6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6.1. Normative References . . . . . . . . . . . . . . . . . . . 4 6.2. Informative References . . . . . . . . . . . . . . . . . . 5 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 5 Chen & Zheng Expires November 13, 2011 [Page 2] Internet-Draft ICC AII May 2011 1. Introduction [I-D.ietf-mpls-tp-identifiers] specifies two formats of Operator Identifier (Opr_ID), uniquely identifying an operator in Multi- Protocol Label Switching Transport Profile (MPLS-TP) networks. One format is compatible with IP operational practice called a Global_ID and anothor format compatible with ITU practice, the ITU Carrier Code (ICC). The Opr_ID MAY use either the Global_ID or ICC format. [RFC4447] defines the signaling mechanisms for establishing point-to- point pseudowires (PWs) between two provider edge (PE) nodes. It defines the format of the Generalized PWid FEC (FEC 129) and the use and semantics of the Attachment Group Identifier (AGI) and Attachment Individual Identifier (AII). Two types of AII have been defined. AII Type 1 defined in [RFC6074] has a fixed-length 32-bit value that is unique within the scope of the local Provider Edge (PE). AII Type 2 defined in [RFC5003] consists a 4-octct length Global ID, a 32-bit prefix field and a 4-octet attachment circuit identifier (AC ID) field. Existing AIIs do not support ICC based identifier. This document defines a new AII type (ICC AII). It use a combination of a 6-octet length ICC, a 4-octet length prefix and a 4-octet length AC ID to create globally unique AII values. 2. ICC AII ICC AII has the consistent structure with AII Type 2, which permits varying levels of AII summarization to take place, thus reducing the scaling burden on the AII distribution mechanisms and PE memory as decribed in RFC5003 [RFC5003]. The encoding of ICC AII is as follows: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | AII Type=03 | Length | ICC | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ICC (contd.) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Prefix | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | AC ID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 1. ICC AII AII Type: To be allocated by IANA (0x03 is recommended). Chen & Zheng Expires November 13, 2011 [Page 3] Internet-Draft ICC AII May 2011 Length: 1 octet in length, specifies the length of the value field in octets. The length is set to 14. ICC: 6 octets in length. As defined in M.1400, ICC is a string of one to six characters. When the length of a ICC string is less than 6, the higher-order unused octets of the ICC field MUST be set to zero. Prefix: Same as [RFC5003]. AC ID field: Same as [RFC5003]. 2.1. Procedures Since the Opr_ID MAY use either the Global_ID or ICC format, the two ends of a PW may use the diffrent AII type. During the Lable Mapping procedure, one end may not map the Target Attachment Identifier (TAI ) to one of its Forwarders. In this case, it MUST send a Label Release message to the other end, with a Status Code of "Unassigned/ Unrecognized TAI", and the processing of the Label Mapping message is complete. In addition, for a specific PW, relevant PEs MUST use the same type of identifiers. 3. IANA Considerations IANA maintains a registry of "Attachment Individual Identifier (AII) Type". This document request IANA to assign a new AII Type as follows: ICC AII: 0x03(TBD) 4. Security Considerations This draft does not intrduce any new security issues, the security mechanisms defined in [RFC5003] apply here. 5. Acknowledgements 6. References 6.1. Normative References [I-D.ietf-mpls-tp-identifiers] Bocci, M., Swallow, G., and E. Gray, "MPLS-TP Chen & Zheng Expires November 13, 2011 [Page 4] Internet-Draft ICC AII May 2011 Identifiers", draft-ietf-mpls-tp-identifiers-04 (work in progress), March 2011. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC5003] Metz, C., Martini, L., Balus, F., and J. Sugimoto, "Attachment Individual Identifier (AII) Types for Aggregation", RFC 5003, September 2007. 6.2. Informative References [RFC4447] Martini, L., Rosen, E., El-Aawar, N., Smith, T., and G. Heron, "Pseudowire Setup and Maintenance Using the Label Distribution Protocol (LDP)", RFC 4447, April 2006. [RFC6074] Rosen, E., Davie, B., Radoaca, V., and W. Luo, "Provisioning, Auto-Discovery, and Signaling in Layer 2 Virtual Private Networks (L2VPNs)", RFC 6074, January 2011. Authors' Addresses Mach(Guoyi) Chen Huawei Technologies Co., Ltd No. 3 Xinxi Road, Shang-di, Hai-dian District Beijing 100085 China Email: mach@huawei.com Lianshu Zheng Huawei Technologies Co., Ltd No. 3 Xinxi Road, Shang-di, Hai-dian District Beijing 100085 China Email: verozheng@huawei.com Chen & Zheng Expires November 13, 2011 [Page 5]