Enhanced Performance Delay and Liveness Monitoring in Segment Routing Networks
draft-gandhi-spring-sr-enhanced-plm-03

Document Type Active Internet-Draft (individual)
Authors Rakesh Gandhi  , Clarence Filsfils  , Navin Vaghamshi  , Moses Nagarajah  , Richard Foote 
Last updated 2020-09-26
Stream (None)
Intended RFC status (None)
Formats plain text xml pdf htmlized (tools) htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
SPRING Working Group                                      R. Gandhi, Ed.
Internet-Draft                                               C. Filsfils
Intended status: Standards Track                     Cisco Systems, Inc.
Expires: March 30, 2021                                     N. Vaghamshi
                                                                Reliance
                                                            M. Nagarajah
                                                                 Telstra
                                                                R. Foote
                                                                   Nokia
                                                      September 26, 2020

 Enhanced Performance Delay and Liveness Monitoring in Segment Routing
                                Networks
                 draft-gandhi-spring-sr-enhanced-plm-03

Abstract

   Segment Routing (SR) leverages the source routing paradigm.  SR is
   applicable to both Multiprotocol Label Switching (SR-MPLS) and IPv6
   (SRv6) data planes.  This document defines procedure for Enhanced
   Performance Delay and Liveness Monitoring (PDLM) in Segment Routing
   networks.  The procedure leverages the probe messages compatible with
   the delay measurement message formats defined in RFC 5357 (Two-Way
   Active Measurement Protocol (TWAMP)) and RFC 8762 (Simple Two-Way
   Active Measurement Protocol (STAMP)) and is applicable to end-to-end
   SR Paths including SR Policies for both SR-MPLS and SRv6 data planes.

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 March 30, 2021.

Gandhi, et al.           Expires March 30, 2021                 [Page 1]
Internet-Draft  Performance and Liveness Monitoring in SR September 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  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   4
     2.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
     2.2.  Abbreviations . . . . . . . . . . . . . . . . . . . . . .   4
     2.3.  Reference Topology  . . . . . . . . . . . . . . . . . . .   5
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  Loopback Mode . . . . . . . . . . . . . . . . . . . . . .   5
     3.2.  Loopback Mode Enabled with Network Programming Function .   6
     3.3.  Example Provisioning Model  . . . . . . . . . . . . . . .   6
   4.  Probe Message Formats . . . . . . . . . . . . . . . . . . . .   7
   5.  Performance Delay and Liveness Monitoring . . . . . . . . . .   9
     5.1.  Probe Message for SR-MPLS . . . . . . . . . . . . . . . .   9
     5.2.  Probe Message for SRv6  . . . . . . . . . . . . . . . . .  10
   6.  Enhanced Performance Delay and Liveness Monitoring  . . . . .  11
     6.1.  Probe Message with Timestamp Label for SR-MPLS  . . . . .  11
       6.1.1.  Timestamp Label Allocation  . . . . . . . . . . . . .  12
       6.1.2.  Node Capability for Timestamp Label . . . . . . . . .  13
     6.2.  Probe Message with Timestamp Endpoint Function for SRv6 .  13
       6.2.1.  Timestamp Endpoint Function Assignment  . . . . . . .  14
       6.2.2.  Node Capability for Timestamp Endpoint Function . . .  15
   7.  ECMP Handling . . . . . . . . . . . . . . . . . . . . . . . .  15
   8.  Failure Notification  . . . . . . . . . . . . . . . . . . . .  15
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  16
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  16
Show full document text