Network-Assigned Upstream Label
RFC 8359
Document | Type | RFC - Proposed Standard (March 2018; No errata) | |
---|---|---|---|
Authors | Xian Zhang , Vishnu Beeram , Igor Bryskin , Daniele Ceccarelli , Oscar de Dios | ||
Last updated | 2018-03-13 | ||
Replaces | draft-ietf-ccamp-network-assigned-upstream-label | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Lou Berger | ||
Shepherd write-up | Show (last changed 2017-06-22) | ||
IESG | IESG state | RFC 8359 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Deborah Brungard | ||
Send notices to | "Lou Berger" <lberger@labn.net> | ||
IANA | IANA review state | IANA OK - Actions Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) X. Zhang, Ed. Request for Comments: 8359 Huawei Technologies Updates: 3471, 3473, 6205 V. Beeram, Ed. Category: Standards Track Juniper Networks ISSN: 2070-1721 I. Bryskin Huawei Technologies D. Ceccarelli Ericsson O. Gonzalez de Dios Telefonica March 2018 Network-Assigned Upstream Label Abstract This document discusses a Generalized Multi-Protocol Label Switching (GMPLS) Resource reSerVation Protocol with Traffic Engineering (RSVP-TE) mechanism that enables the network to assign an upstream label for a bidirectional Label Switched Path (LSP). This is useful in scenarios where a given node does not have sufficient information to assign the correct upstream label on its own and needs to rely on the downstream node to pick an appropriate label. This document updates RFCs 3471, 3473, and 6205 as it defines processing for a special label value in the UPSTREAM_LABEL object. Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at https://www.rfc-editor.org/info/rfc8359. Zhang, et al. Standards Track [Page 1] RFC 8359 Network Assigned Upstream-Label March 2018 Copyright Notice Copyright (c) 2018 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 (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents 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 . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3 3. Unassigned Upstream Label . . . . . . . . . . . . . . . . . . 3 3.1. Procedures . . . . . . . . . . . . . . . . . . . . . . . 4 3.2. Backwards Compatibility . . . . . . . . . . . . . . . . . 5 4. Use-Case: Wavelength Setup for IP over Optical Networks . . . 5 4.1. Initial Setup . . . . . . . . . . . . . . . . . . . . . . 6 4.2. Wavelength Change . . . . . . . . . . . . . . . . . . . . 7 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7 6. Security Considerations . . . . . . . . . . . . . . . . . . . 7 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 8 7.1. Normative References . . . . . . . . . . . . . . . . . . 8 7.2. Informative References . . . . . . . . . . . . . . . . . 9 Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 9 Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 10 1. Introduction A functional description of the Generalized Multi-Protocol Label Switching (GMPLS) signaling extensions for setting up a bidirectional Label Switched Path (LSP) is provided in [RFC3471]. The GMPLS Resource reSerVation Protocol with Traffic Engineering (RSVP-TE) extensions for setting up a bidirectional LSP are specified in [RFC3473]. The bidirectional LSP setup is indicated by the presence of an UPSTREAM_LABEL object in the Path message. As per the existing setup procedure outlined for a bidirectional LSP, each upstream node must allocate a valid upstream label on the outgoing interface before sending the initial Path message downstream. However, there are certain scenarios (see Section 4) where it is not desirable or possible for a given node to pick the upstream label on its own. Zhang, et al. Standards Track [Page 2]Show full document text