Signaling Entropy Label Capability and Entropy Readable Label Depth Using OSPF
draft-ietf-ospf-mpls-elc-15
Document | Type | Active Internet-Draft (lsr WG) | ||
---|---|---|---|---|
Authors | Xiaohu Xu , Sriganesh Kini , Peter Psenak , Clarence Filsfils , Stephane Litkowski , Matthew Bocci | |||
Last updated | 2020-06-08 (latest revision 2020-06-01) | |||
Replaces | draft-xu-ospf-mpls-elc, draft-ietf-idr-bgp-ls-segment-routing-rld | |||
Stream | Internent Engineering Task Force (IETF) | |||
Intended RFC status | Proposed Standard | |||
Formats | plain text pdf htmlized (tools) htmlized bibtex | |||
Reviews | ||||
Stream | WG state | Submitted to IESG for Publication | ||
Document shepherd | Acee Lindem | |||
Shepherd write-up | Show (last changed 2019-10-24) | |||
IESG | IESG state | RFC Ed Queue | ||
Action Holders |
(None)
|
|||
Consensus Boilerplate | Yes | |||
Telechat date | ||||
Responsible AD | Alvaro Retana | |||
Send notices to | Acee Lindem <acee@cisco.com>, aretana.ietf@gmail.com | |||
IANA | IANA review state | Version Changed - Review Needed | ||
IANA action state | RFC-Ed-Ack | |||
RFC Editor | RFC Editor state | MISSREF | ||
Details |
LSR Working Group X. Xu Internet-Draft Alibaba Inc Intended status: Standards Track S. Kini Expires: December 3, 2020 P. Psenak C. Filsfils S. Litkowski Cisco Systems, Inc. M. Bocci Nokia June 1, 2020 Signaling Entropy Label Capability and Entropy Readable Label Depth Using OSPF draft-ietf-ospf-mpls-elc-15 Abstract Multiprotocol Label Switching (MPLS) has defined a mechanism to load- balance traffic flows using Entropy Labels (EL). An ingress Label Switching Router (LSR) cannot insert ELs for packets going into a given Label Switched Path (LSP) unless an egress LSR has indicated via signaling that it has the capability to process ELs, referred to as the Entropy Label Capability (ELC), on that LSP. In addition, it would be useful for ingress LSRs to know each LSR's capability for reading the maximum label stack depth and performing EL-based load- balancing, referred to as Entropy Readable Label Depth (ERLD). This document defines a mechanism to signal these two capabilities using OSPFv2 and OSPFv3 and BGP-LS. 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 https://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 December 3, 2020. Xu, et al. Expires December 3, 2020 [Page 1] Internet-Draft Signaling ELC and ERLD using OSPF June 2020 Copyright Notice Copyright (c) 2020 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. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Advertising ELC Using OSPF . . . . . . . . . . . . . . . . . 3 3.1. Advertising ELC Using OSPFv2 . . . . . . . . . . . . . . 3 3.2. Advertising ELC Using OSPFv3 . . . . . . . . . . . . . . 4 4. Advertising ERLD Using OSPF . . . . . . . . . . . . . . . . . 4 5. Signaling ELC and ERLD in BGP-LS . . . . . . . . . . . . . . 5 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5 7. Security Considerations . . . . . . . . . . . . . . . . . . . 5 8. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 6 9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 6 10. References . . . . . . . . . . . . . . . . . . . . . . . . . 6 10.1. Normative References . . . . . . . . . . . . . . . . . . 6 10.2. Informative References . . . . . . . . . . . . . . . . . 8 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8 1. Introduction [RFC6790] describes a method to load-balance Multiprotocol Label Switching (MPLS) traffic flows using Entropy Labels (EL). It also introduces the concept of Entropy Label Capability (ELC) and defines the signaling of this capability via MPLS signaling protocols. Recently, mechanisms have been defined to signal labels via link- state Interior Gateway Protocols (IGP) such as OSPFv2 [RFC8665] and OSPFv3 [RFC8666]. This draft defines a mechanism to signal the ELC using OSPFv2 and OSPFv3. In cases where Segment Routing (SR) is used with the MPLS Data Plane (e.g., SR-MPLS [RFC8660]), it would be useful for ingress LSRs toShow full document text