LDP Extensions for RMR
draft-ietf-mpls-ldp-rmr-extensions-03
INTERNET-DRAFT Santosh Esale
Intended Status: Proposed Standard Kireeti Kompella
Expires: September 09, 2020 Juniper Networks
March 09, 2020
LDP Extensions for RMR
draft-ietf-mpls-ldp-rmr-extensions-03
Abstract
This document describes LDP extensions to signal Resilient MPLS Ring
(RMR) Label Switched Paths (LSPs). An RMR LSP is a multipoint to
point LSP signaled using LDP (Label Distribution Protocol). RMR
Architecture document - draft-ietf-mpls-rmr-02 - describes why and
how MPLS should be used in ring topologies.
Status of this Memo
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Copyright and License Notice
Copyright (c) 2019 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
Esale, et al. Expires December 13, 2019 [Page 1]
INTERNET DRAFT LDP Extensions for RMR June 11, 2019
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Table of Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Protocol extensions . . . . . . . . . . . . . . . . . . . . . 4
3.1. Ring LSP Capability . . . . . . . . . . . . . . . . . . . 4
3.2. Ring FEC Element . . . . . . . . . . . . . . . . . . . . . 4
4. Ring Procedures . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 Upstream LSR . . . . . . . . . . . . . . . . . . . . . . . . 6
4.2 Ring Label Mapping Procedures . . . . . . . . . . . . . . . 7
4.2.1 Definitions . . . . . . . . . . . . . . . . . . . . . . 7
4.2.2 Preliminary . . . . . . . . . . . . . . . . . . . . . . 7
4.2.3 Egress LSR . . . . . . . . . . . . . . . . . . . . . . 7
4.2.4 Ingress and Transit LSR . . . . . . . . . . . . . . . . 8
4.3 Equal Cost Multipath (ECMP) . . . . . . . . . . . . . . . . 8
4.4 Protection . . . . . . . . . . . . . . . . . . . . . . . . . 8
5. LSP Hierarchy . . . . . . . . . . . . . . . . . . . . . . . . 9
6. Ring LSPs . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7. Security Considerations . . . . . . . . . . . . . . . . . . . 11
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 11
9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 11
10. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 11
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 12
11.1 Normative References . . . . . . . . . . . . . . . . . . . 12
11.2 Informative References . . . . . . . . . . . . . . . . . . 12
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 13
Esale, et al. Expires December 13, 2019 [Page 2]
INTERNET DRAFT LDP Extensions for RMR June 11, 2019
1 Introduction
This document describes LDP extensions to signal resilient MPLS ring
(RMR) label switched paths (LSPs). An RMR LSP is a multipoint to
point LSP signaled using LDP (Label Distribution Protocol).
Architecture document of RMR - draft-ietf-mpls-rmr-02 - describes why
and how MPLS should be used in ring topologies.
The ring is either auto-discovered or configured using IGP protocol
such as OSPF or ISIS. IGP extensions for RMR is described in a
companion documents. After the ring discovery, each ring node acting
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