PMS/Head-end based MPLS Ping and Traceroute in Inter-domain SR Networks
draft-ninan-mpls-spring-inter-domain-oam-00
Routing area S. Hegde
Internet-Draft K. Arora
Intended status: Standards Track Juniper Networks Inc.
Expires: November 7, 2020 S. Ninan
Individual Contributor
M. Srivastava
Juniper Networks Inc.
N. Kumar
Cisco Systems, Inc.
May 6, 2020
PMS/Head-end based MPLS Ping and Traceroute in Inter-domain SR Networks
draft-ninan-mpls-spring-inter-domain-oam-00
Abstract
Segment Routing (SR) architecture leverages source routing and
tunneling paradigms and can be directly applied to the use of a
Multiprotocol Label Switching (MPLS) data plane. A network may
consist of multiple IGP domains or multiple ASes under the control of
same organization. It is useful to have the LSP Ping and traceroute
procedures when an SR end-to-end path spans across multiple ASes or
domains. This document describes mechanisms to facilitae LSP ping
and traceroute in inter-AS/inter-domain SR networks in an efficient
manner with simple OAM protocol extension which uses dataplane
forwarding alone for sending Echo-Reply.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
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material or to cite them other than as "work in progress."
Hegde, et al. Expires November 7, 2020 [Page 1]
Internet-Draft Inter-as-OAM May 2020
This Internet-Draft will expire on November 7, 2020.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Inter domain networks with multiple IGPs . . . . . . . . . . 4
3. Reverse Path Segment List TLV . . . . . . . . . . . . . . . . 5
3.1. Reverse Path Segment List TLV definition . . . . . . . . 5
3.1.1. Segment sub-TLV . . . . . . . . . . . . . . . . . . . 6
3.2. SRv6 Dataplane . . . . . . . . . . . . . . . . . . . . . 10
4. Detailed Procedures . . . . . . . . . . . . . . . . . . . . . 11
4.1. Sending an Echo-Request . . . . . . . . . . . . . . . . . 11
4.2. Receiving an Echo-Request . . . . . . . . . . . . . . . . 11
4.3. Sending an Echo-Reply . . . . . . . . . . . . . . . . . . 11
5. Detailed Example . . . . . . . . . . . . . . . . . . . . . . 11
5.1. Procedures for Segment Routing LSP ping . . . . . . . . . 12
5.2. Procedures for Segment Routing LSP Traceroute . . . . . . 13
6. Building Reverse Path Segment List TLV dynamically . . . . . 13
6.1. The procedures to build the reverse path . . . . . . . . 13
6.2. Details with example . . . . . . . . . . . . . . . . . . 14
7. Security Considerations . . . . . . . . . . . . . . . . . . . 14
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14
9. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 14
10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 15
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 15
11.1. Normative References . . . . . . . . . . . . . . . . . . 15
11.2. Informative References . . . . . . . . . . . . . . . . . 15
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