Label Switched Path (LSP) Ping/Traceroute for Segment Routing (SR) Egress Peer Engineering Segment Identifiers (SIDs) with MPLS Data Planes
draft-ietf-mpls-sr-epe-oam-02
Routing area S. Hegde
Internet-Draft K. Arora
Intended status: Standards Track M. Srivastava
Expires: August 24, 2021 Juniper Networks Inc.
S. Ninan
Individual Contributor
X. Xu
Alibaba Inc.
February 20, 2021
Label Switched Path (LSP) Ping/Traceroute for Segment Routing (SR)
Egress Peer Engineering Segment Identifiers (SIDs) with MPLS Data Planes
draft-ietf-mpls-sr-epe-oam-02
Abstract
Egress Peer Engineering (EPE) is an application of Segment Routing to
Solve the problem of egress peer selection. The Segment Routing
based BGP-EPE solution allows a centralized controller, e.g. a
Software Defined Network (SDN) controller to program any egress peer.
The EPE solution requires a node to program the PeerNode Segment
Identifier(SID) describing a session between two nodes, the PeerAdj
SID describing the link (one or more) that is used by sessions
between peer nodes, and the PeerSet SID describing an arbitrary set
of sessions or links between a local node and its peers. This
document provides new sub-TLVs for EPE Segment Identifiers (SID) that
would be used in the MPLS Target stack TLV (Type 1), in MPLS Ping and
Traceroute procedures.
Status of This Memo
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This Internet-Draft will expire on August 24, 2021.
Hegde, et al. Expires August 24, 2021 [Page 1]
Internet-Draft EPE-OAM February 2021
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Theory of Operation . . . . . . . . . . . . . . . . . . . . . 3
3. Requirements Language . . . . . . . . . . . . . . . . . . . . 4
4. FEC Definitions . . . . . . . . . . . . . . . . . . . . . . . 4
4.1. PeerAdj SID Sub-TLV . . . . . . . . . . . . . . . . . . . 4
4.2. PeerNode SID Sub-TLV . . . . . . . . . . . . . . . . . . 6
4.3. PeerSet SID Sub-TLV . . . . . . . . . . . . . . . . . . . 8
5. EPE-SID FEC validation . . . . . . . . . . . . . . . . . . . 10
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
7. Security Considerations . . . . . . . . . . . . . . . . . . . 13
8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 13
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
9.1. Normative References . . . . . . . . . . . . . . . . . . 13
9.2. Informative References . . . . . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
1. Introduction
Egress Peer Engineering (EPE) as defined in
[I-D.ietf-spring-segment-routing-central-epe] is an effective
mechanism to select the egress peer link based on different criteria.
The EPE-SIDs provide means to represent egress peer links. Many
network deployments have built their networks consisting of multiple
Autonomous Systems either for ease of operations or as a result of
network mergers and acquisitons. The inter-AS links connecting the
two Autonomous Systems could be traffic engineered using EPE-SIDs in
this case as well.It is important to be able to validate the control
plane to forwarding plane synchronization for these SIDs so that any
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