Network Automatic Optimization Based on Dynamic Adjustment of IGP Metrics
draft-hu-lsr-network-automatic-optimization-00

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Network Working Group                                              Z. Hu
Internet-Draft                                                    G. Yan
Intended status: Standards Track                                  J. Yao
Expires: January 3, 2019                             Huawei Technologies
                                                            July 2, 2018

   Network Automatic Optimization Based on Dynamic Adjustment of IGP
                                Metrics
             draft-hu-lsr-network-automatic-optimization-00

Abstract

   The centralized traffic engineering technology adopts centralized
   calculation, PCE/SDN performs centralized calculation based on the
   collected link-status and TE information collected by BGP-LS/IGP, so
   that the traffic in the network is optimized to the optimization
   goal.

   The distributed traffic engineering technology uses IGP to calculate
   the shortest path.  Each node in the network calculates the next hop
   to a destination address based on the same algorithm and network
   topology.  Each algorithm can calculate a shortest path tree in the
   entire network, which can reduce the amount of calculation, so that
   the hard convergence time of TE can be close to the convergence time
   of IGP.

   The distributed computing and management methods can not co-ordinate
   management of network bandwidth resources.  As a result, network
   bandwidth resources can not be planned in an integrated manner,
   bandwidth resources are wasted, and even tunnels cannot be
   established.  This document attempts to discuss a automatic network
   optimization function of the distributed traffic engineering
   technology by the method of dynamically adjusting the link Metric.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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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   working documents as Internet-Drafts.  The list of current Internet-
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   This Internet-Draft will expire on January 3, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (https://trustee.ietf.org/license-info) in effect on the date of
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Automatic Network Optimization Method . . . . . . . . . . . .   3
   3.  Optimization Rules  . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  Threshold Regulation  . . . . . . . . . . . . . . . . . .   5
     3.2.  Optimization Rules  . . . . . . . . . . . . . . . . . . .   5
   4.  Controller Adjustment Scenario  . . . . . . . . . . . . . . .   6
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   The concept of IGP Metric defined in [RFC1195] for ISIS, and defined
   in [RFC2328] and [RFC5340] for OSPF, indicating the cost of using
   this router link.

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   Segment Routing (SR) described in [I-D.ietf-spring-segment-routing]
   leverages the source routing paradigm.  Segment Routing can be
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