Usage and Applicability of Link State Vector Routing in Data Centers
draft-ietf-lsvr-applicability-07
LSVR K. Patel
Internet-Draft Arrcus, Inc.
Intended status: Informational A. Lindem
Expires: March 25, 2021 Cisco Systems
S. Zandi
G. Dawra
Linkedin
September 21, 2020
Usage and Applicability of Link State Vector Routing in Data Centers
draft-ietf-lsvr-applicability-07
Abstract
This document discusses the usage and applicability of Link State
Vector Routing (LSVR) extensions in data center networks utilizing
CLOS or Fat-Tree topologies. The document is intended to provide a
simplified guide for the deployment of LSVR extensions.
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This Internet-Draft will expire on March 25, 2021.
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Patel, et al. Expires March 25, 2021 [Page 1]
Internet-Draft September 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3
3. Recommended Reading . . . . . . . . . . . . . . . . . . . . . 3
4. Common Deployment Scenario . . . . . . . . . . . . . . . . . 3
5. Justification for BGP SPF Extension . . . . . . . . . . . . . 4
6. LSVR Applicability to CLOS Networks . . . . . . . . . . . . . 5
6.1. Usage of BGP-LS SPF SAFI . . . . . . . . . . . . . . . . 5
6.1.1. Relationship to Other BGP AFI/SAFI Tuples . . . . . . 6
6.2. Peering Models . . . . . . . . . . . . . . . . . . . . . 6
6.2.1. Sparse Peering Model . . . . . . . . . . . . . . . . 6
6.2.2. Bi-Connected Graph Heuristic . . . . . . . . . . . . 7
6.3. BGP Spine/Leaf Topology Policy . . . . . . . . . . . . . 7
6.4. BGP Peer Discovery Requirements . . . . . . . . . . . . . 8
6.5. BGP Peer Discovery . . . . . . . . . . . . . . . . . . . 9
6.5.1. BGP Peer Discovery Alternatives . . . . . . . . . . . 9
6.5.2. BGP IPv6 Simplified Peering . . . . . . . . . . . . . 9
6.5.3. BGP-LS SPF Topology Visibility for Management . . . . 10
6.5.4. Data Center Interconnect (DCI) Applicability . . . . 10
7. Non-CLOS/FAT Tree Topology Applicability . . . . . . . . . . 10
8. Non-Transit Node Capability . . . . . . . . . . . . . . . . . 10
9. BGP Policy Applicability . . . . . . . . . . . . . . . . . . 11
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
11. Security Considerations . . . . . . . . . . . . . . . . . . . 11
12. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 11
13. References . . . . . . . . . . . . . . . . . . . . . . . . . 11
13.1. Normative References . . . . . . . . . . . . . . . . . . 11
13.2. Informative References . . . . . . . . . . . . . . . . . 12
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 14
1. Introduction
This document complements [I-D.ietf-lsvr-bgp-spf] by discussing the
applicability of the technology in a simple and fairly common
deployment scenario, which is described in Section 4.
After describing the deployment scenario, Section 5 will describe the
reasons for BGP modifications for such deployments.
Once the control plane routing protocol requirements are described,
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