RSVP Extensions for RMR
draft-ietf-teas-rsvp-rmr-extension-03
TEAS WG A. Deshmukh
Internet-Draft K. Kompella
Intended status: Standards Track Juniper Networks, Inc.
Expires: January 28, 2021 July 27, 2020
RSVP Extensions for RMR
draft-ietf-teas-rsvp-rmr-extension-03
Abstract
Ring topology is commonly found in access and aggregation networks.
However, the use of MPLS as the transport protocol for rings is very
limited today. {{!I-D.ietf-mpls-rmr}} describes a mechanism to
handle rings efficiently using MPLS. This document describes the
extensions to the RSVP-TE protocol for signaling MPLS label switched
paths in rings.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. RSVP Extensions . . . . . . . . . . . . . . . . . . . . . . . 4
3.1. Session Object . . . . . . . . . . . . . . . . . . . . . 4
3.2. SENDER_TEMPLATE,FILTER_SPEC Objects . . . . . . . . . . . 5
4. Ring Signaling Procedures . . . . . . . . . . . . . . . . . . 5
4.1. Differences from regular RSVP-TE LSPs . . . . . . . . . . 5
4.2. LSP signaling . . . . . . . . . . . . . . . . . . . . . . 6
4.2.1. Path Propagation for RMR . . . . . . . . . . . . . . 8
4.2.2. Resv Processing for RMR . . . . . . . . . . . . . . . 8
4.3. Protection . . . . . . . . . . . . . . . . . . . . . . . 9
4.4. Ring changes . . . . . . . . . . . . . . . . . . . . . . 10
4.5. Express Links . . . . . . . . . . . . . . . . . . . . . . 11
4.6. Bandwidth management . . . . . . . . . . . . . . . . . . 11
5. Security Considerations . . . . . . . . . . . . . . . . . . . 13
6. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 13
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.1. Normative References . . . . . . . . . . . . . . . . . . 14
8.2. Informative References . . . . . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
1. Introduction
This document extends RSVP-TE [RFC3209] to establish label-switched
path (LSP) tunnels in the ring topology. Rings are auto-discovered
using the mechanisms mentioned in the {{!I-D.ietf-mpls-rmr}}. Either
IS-IS [RFC5305] or OSPF[RFC3630] can be used as the IGP for auto-
discovering the rings.
After the rings are auto-discovered, each node in the ring knows its
clockwise(CW) and anti-clockwise (AC) ring neighbors and its ring
links. All of the express links in the ring also get identified as
part of the auto-discovery process. At this point, every node in the
ring informs the RSVP protocol to begin the signaling of the ring
LSPs.
Section 2 covers the terminology used in this document. Section 3
presents the RSVP protocol extensions needed to support MPLS rings.
Section 4 describes the procedures of RSVP LSP signaling in detail.
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