Network Working Group B. Rajagopalan Request for Comments: 3476 Tellium, Inc. Category: Informational March 2003
Documentation of IANA Assignments for Label Distribution Protocol (LDP), Resource ReSerVation Protocol (RSVP), and Resource ReSerVation Protocol-Traffic Engineering (RSVP-TE) Extensions for Optical UNI Signaling
Status of this Memo
This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2003). All Rights Reserved.
Abstract
The Optical Interworking Forum (OIF) has defined extensions to the Label Distribution Protocol (LDP) and the Resource ReSerVation Protocol (RSVP) for optical User Network Interface (UNI) signaling. These extensions consist of a set of new data objects and error codes. This document describes these extensions.
The OIF UNI signaling specification is described in [8]. This specification utilizes IETF protocol standards as well as IETF work in progress. Specifically, the following IETF specifications are used:
o Label distribution protocol (LDP) [6] o Resource reservation protocol (RSVP) [5] o GMPLS signaling and GMPLS extensions for SONET/SDH [4] o GMPLS RSVP-TE and CR-LDP extensions [2, 3]
The aim of the OIF UNI specification is the maximal re-use of IETF protocol definitions. A few extensions to IETF protocols, however, have been defined to serve UNI-specific needs. These extensions are described in this document.
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The LDP extensions for UNI signaling consist of new TLVs that capture UNI-specific parameters and new UNI-specific status codes. The new TLVs are Source ID (3 TLVs), Destination ID (3 TLVs), Egress Label, Local Connection ID, Diversity, Contract ID, and UNI Service Level [8]. These are described below. The new status codes are assigned from the private use space of LDP codes, as described in [8]. The UNI specification [8] also defines two new LDP messages, Status Enquiry and Status Response. These messages have been obsoleted and hence no code points are requested in this document for them.
A single new object class, called "Generalized_UNI" is defined. In addition, extension to the RSVP session object and new UNI-specific error codes are defined. These are described below.
UNI-specific errors fall under the "Routing Problem" (error code = 24) [7] and "Policy Control Failure" (error code = 2) [5] errors, and they require the assignment of sub-codes. The following is the list of errors and proposed assignments of sub-codes:
- Routing Problem: Diversity not available (Error code = 24, sub- code = 100) - Routing Problem: Service level not available (Error code = 24, sub-code = 101) - Routing problem: Invalid/Unknown connection ID (Error code = 24, sub-code = 102) - Policy control failure: Unauthorized sender (Error code = 2, sub- code = 100) - Policy control failure: Unauthorized receiver (Error code = 2, sub-code = 101)
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The OIF UNI 1.0 specification defines new objects and error codes under LDP and RSVP. The majority of these extensions require code point assignments via IETF consensus action. These are summarized below.
Generalized_UNI object class (Section 3.1), Class Number 229, C-Type 1. Further sub-objects are defined, with Type numbers 1-5 and various Sub-Type numbers, as described in Section 3.1. The code points for the Generalized_UNI object and the associated sub-objects require IANA administration.
UNI_Ipv4_Session Object (Class-Num = 1, C-Type = 11), as described in Section 3.2.
UNI-specific errors fall under the Routing Problem and Policy Control Failure errors (error codes 24 and 2). Sub-codes under error code 24 are 100, 101 and 102, as described in Section 3.3. Sub-codes under error code 2 are 100 and 101, as described in Section 3.3.
Security considerations related to RSVP, RSVP-TE and LDP are described in Section 2.8, Section 6 and Section 5 of RFCs 2205 [5], 3209 [9] and 3036 [6], respectively. Security considerations pertaining to UNI signaling using the extensions described in this document and how these relate to the security aspects of RSVP, RSVP- TE and LDP are described in Section 13.4 of the UNI specification [8].
RFC 3476 LDP & RSVP Extensions for Optical UNI Signaling March 2003
[3] Ashwood-Smith, P. and L. Berger, Editors, "Generalized Multi- Protocol Label Switching (MPLS) Signaling Constraint-based Routed Label Distribution Protocol (CR-LDP) Extensions", RFC 3472, January 2003.
[4] E. Mannie, et al., "GMPLS Extensions for SONET and SDH Control", Work in Progress.
[5] Braden, R., Editor, Zhang, L., Berson, S., Herzog, S. and S. Jamin, "RSVP Functional Specification", RFC 2205, September 1997.
[6] Andersson, L., Doolan, P., Feldman, N., Fredette, A. and B. Thomas, "LDP Specification", RFC 3036, January 2001.
[7] Awduche, D., Berger, L., Gan, D., Li, T., Srinivasan, V. and G. Swallow, "RSVP-TE: Extensions to RSVP for LSP Tunnels", RFC 3209, December 2001.
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Bala Rajagopalan Tellium, Inc. 2 Crescent Place Ocean Port, NJ 07757
Phone: +1-732-923-4237 EMail: braja@tellium.com
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