Generic Fault-avoidance Routing Protocol for Data Center Networks
draft-sl-rtgwg-far-dcn-03
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Routing Area Working Group Bin Liu
Internet-Draft ZTE Inc.
Intended status: Informational Yantao Sun
Expires: November 1, 2015 Jing Cheng
Yichen Zhang
Beijing Jiaotong University
Bhumip Khasnabish
ZTE TX Inc.
April 30, 2015
Generic Fault-avoidance Routing Protocol for Data Center Networks
draft-sl-rtgwg-far-dcn-03
Abstract
This draft proposes a generic routing method and protocol for a
regular data center network, named as the fault-avoidance routing
(FAR) protocol. FAR protocol provides a generic routing method for
all types of 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 simplistic 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
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
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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 1, 2015.
Copyright Notice
Copyright (c) 2015 IETF Trust and the persons identified as the
document authors. All rights reserved.
Bin Liu, et al. Expires November 1, 2015 [Page 1]
Internet-Draft FAR for DCN April 2015
This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Acronyms & Definitions . . . . . . . . . . . . . . . . . 3
2. Conventions used in this document . . . . . . . . . . . . . . 4
3. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 4
3.1. The Impact of Large-scale Networks on Route Calculation . 4
3.2. Dilemma of conventional routing methods in a large-scale
network with giant number nodes of routers . . . . . . . 5
3.3. Network Addressing Issues . . . . . . . . . . . . . . . . 7
3.4. Big Routing Table Issues . . . . . . . . . . . . . . . . 8
3.5. Adaptivity Issues for Routing Algorithms . . . . . . . . 8
3.6. Virtual Machine Migration Issues . . . . . . . . . . . . 8
4. The FAR Framework . . . . . . . . . . . . . . . . . . . . . . 9
5. Data Format . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1. Data Tables . . . . . . . . . . . . . . . . . . . . . . . 10
5.2. Messages . . . . . . . . . . . . . . . . . . . . . . . . 12
6. FAR Modules . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1. Neighbor and Link Detection Module(M1) . . . . . . . . . 16
6.2. Device Learning Module(M2) . . . . . . . . . . . . . . . 17
6.3. Invisible Neighbor and Link Failure Inferring Module(M3) 17
6.4. Link Failure Learning Module(M4) . . . . . . . . . . . . 17
6.5. BRT Building Module(M5) . . . . . . . . . . . . . . . . . 18
6.6. NRT Building Module(M6) . . . . . . . . . . . . . . . . . 18
6.7. Routing Table Lookup(M7) . . . . . . . . . . . . . . . . 18
7. How a FAR Router Works . . . . . . . . . . . . . . . . . . . 18
8. Compatible Architecture . . . . . . . . . . . . . . . . . . . 21
9. Application Example . . . . . . . . . . . . . . . . . . . . . 22
9.1. BRT Building Procedure . . . . . . . . . . . . . . . . . 24
9.2. NRT Building Procedure . . . . . . . . . . . . . . . . . 25
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