Generic Fault-Avoidance Routing Protocol for Data Center Networks
draft-sl-rtgwg-far-dcn-14
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2020-05-25
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ISE
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Intended RFC status |
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Informational
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Document shepherd |
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Adrian Farrel
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Adrian Farrel <rfc-ise@rfc-editor.org>
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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
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on November 27, 2020.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Bin Liu, et al. Expires November 27, 2020 [Page 1]
Internet-Draft FAR for DCN May 2020
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
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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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