Generic Fault-Avoidance Routing Protocol for Data Center Networks
draft-sl-rtgwg-far-dcn-14
Routing Area Working Group Bin Liu
Internet-Draft ZTE Inc., ZTE Plaza
Intended status: Informational Yantao Sun
Expires: November 27, 2020 Jing Cheng
Yichen Zhang
Beijing Jiaotong University
Bhumip Khasnabish
ZTE TX Inc.
May 26, 2020
Generic Fault-Avoidance Routing Protocol for Data Center Networks
draft-sl-rtgwg-far-dcn-14
Abstract
This draft describes a generic routing method and protocol for a
regular data center network, named the Fault-Avoidance Routing (FAR)
protocol. The FAR protocol provides a generic routing method for all
types of regular topology network architectures that have been
proposed for large-scale cloud-based data centers over the past few
years. The FAR protocol is designed to leverage any regularity in
the topology and compute its routing table in a simplistic manner.
Fat-tree is taken as an example architecture to illustrate how the
FAR protocol can be applied in real operational scenarios.
Status of This Memo
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This Internet-Draft will expire on November 27, 2020.
Copyright Notice
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document authors. All rights reserved.
Bin Liu, et al. Expires November 27, 2020 [Page 1]
Internet-Draft FAR for DCN May 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Acronyms & Definitions . . . . . . . . . . . . . . . . . 4
2. Conventions used in this document . . . . . . . . . . . . . . 5
3. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 5
3.1. The Impact of Large-scale Networks on Route Calculation . 5
3.2. Dilemma of conventional routing methods in a large-scale
network with giant number nodes of routers . . . . . . . 6
3.3. Network Addressing Issues . . . . . . . . . . . . . . . . 8
3.4. Big Routing Table Issues . . . . . . . . . . . . . . . . 9
3.5. Adaptivity Issues for Routing Algorithms . . . . . . . . 9
3.6. Virtual Machine Migration Issues . . . . . . . . . . . . 9
4. The FAR Framework . . . . . . . . . . . . . . . . . . . . . . 10
5. Data Format . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1. Data Tables . . . . . . . . . . . . . . . . . . . . . . . 11
5.2. Messages . . . . . . . . . . . . . . . . . . . . . . . . 13
6. FAR Modules . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1. Neighbor and Link Detection Module(M1) . . . . . . . . . 17
6.2. Device Learning Module(M2) . . . . . . . . . . . . . . . 18
6.3. Invisible Neighbor and Link Failure Inferring Module(M3) 18
6.4. Link Failure Learning Module(M4) . . . . . . . . . . . . 18
6.5. BRT Building Module(M5) . . . . . . . . . . . . . . . . . 19
6.6. NRT Building Module(M6) . . . . . . . . . . . . . . . . . 19
6.7. Routing Table Lookup(M7) . . . . . . . . . . . . . . . . 19
7. How a FAR Router Works . . . . . . . . . . . . . . . . . . . 20
8. Compatible Architecture . . . . . . . . . . . . . . . . . . . 22
9. Topology identification and broadcast storm suppression . . . 23
10. Application Example . . . . . . . . . . . . . . . . . . . . . 23
10.1. BRT Building Procedure . . . . . . . . . . . . . . . . . 25
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