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 to
Show full document text