BGP-LS extensions for Segment Routing BGP Egress Peer Engineering
draft-ietf-idr-bgpls-segment-routing-epe-19
Inter-Domain Routing S. Previdi
Internet-Draft Individual
Intended status: Standards Track K. Talaulikar, Ed.
Expires: November 17, 2019 C. Filsfils
Cisco Systems, Inc.
K. Patel
Arrcus, Inc.
S. Ray
Individual Contributor
J. Dong
Huawei Technologies
May 16, 2019
BGP-LS extensions for Segment Routing BGP Egress Peer Engineering
draft-ietf-idr-bgpls-segment-routing-epe-19
Abstract
Segment Routing (SR) leverages source routing. A node steers a
packet through a controlled set of instructions, called segments, by
prepending the packet with an SR header. A segment can represent any
instruction, topological or service-based. SR segments allow
steering a flow through any topological path and service chain while
maintaining per-flow state only at the ingress node of the SR domain.
This document describes an extension to BGP Link-State (BGP-LS) for
advertisement of BGP Peering Segments along with their BGP peering
node information so that efficient BGP Egress Peer Engineering (EPE)
policies and strategies can be computed based on Segment Routing.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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Drafts is at https://datatracker.ietf.org/drafts/current/.
Previdi, et al. Expires November 17, 2019 [Page 1]
Internet-Draft Segment Routing EPE BGP-LS Extensions May 2019
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This Internet-Draft will expire on November 17, 2019.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. BGP Peering Segments . . . . . . . . . . . . . . . . . . . . 4
3. BGP-LS NLRI Advertisement for BGP Protocol . . . . . . . . . 5
3.1. BGP Router-ID and Member AS Number . . . . . . . . . . . 6
3.2. Mandatory BGP Node Descriptors . . . . . . . . . . . . . 6
3.3. Optional BGP Node Descriptors . . . . . . . . . . . . . . 7
4. BGP-LS Attributes for BGP Peering Segments . . . . . . . . . 7
4.1. Advertisement of the PeerNode SID . . . . . . . . . . . . 10
4.2. Advertisement of the PeerAdj SID . . . . . . . . . . . . 11
4.3. Advertisement of the PeerSet SID . . . . . . . . . . . . 12
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
5.1. New BGP-LS Protocol-ID . . . . . . . . . . . . . . . . . 13
5.2. Node Descriptors and Link Attribute TLVs . . . . . . . . 13
6. Manageability Considerations . . . . . . . . . . . . . . . . 14
7. Security Considerations . . . . . . . . . . . . . . . . . . . 15
8. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 15
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 16
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 16
10.1. Normative References . . . . . . . . . . . . . . . . . . 16
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