Generic Fault-Avoidance Routing Protocol for Data Center Networks
draft-sl-rtgwg-far-dcn-15
Routing Area Working Group Bin Liu
Internet-Draft ZTE Inc., ZTE Plaza
Intended status: Informational Yantao Sun
Expires: May 30, 2021 Jing Cheng
Yichen Zhang
Beijing Jiaotong University
Bhumip Khasnabish
Individual contributor
November 26, 2020
Generic Fault-Avoidance Routing Protocol for Data Center Networks
draft-sl-rtgwg-far-dcn-15
Abstract
This document proposes a generic routing method and protocol for a
regular data center network, named as Fault-Avoidance Routing (FAR)
protocol. FAR protocol provides a generic routing method for all
types of regular topology network architectures that are proposed for
large-scale cloud-based data centers over the past few years. FAR
protocol is well designed to fully leverage the regularity in the
topology and compute its routing table in a concise manner. Fat-tree
is taken as an example architecture to illustrate how FAR protocol
can be applied in real operational scenarios.
Status of This Memo
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This Internet-Draft will expire on May 30, 2021.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Bin Liu, et al. Expires May 30, 2021 [Page 1]
Internet-Draft FAR for DCN November 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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