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Applicability of OSPF Topology-Transparent Zone
draft-chen-ospf-ttz-app-05

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Last updated: 2014-07-04
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Internet Engineering Task Force                                  H. Chen
Internet-Draft                                                     R. Li
Intended status: Informational                       Huawei Technologies
Expires: January 5, 2015                                      G. Cauchie

                                                                   N. So
                                                     Tata Communications
                                                                  V. Liu
                                                            China Mobile
                                                                  L. Liu
                                                                UC Davis
                                                            July 4, 2014

            Applicability of OSPF Topology-Transparent Zone
                     draft-chen-ospf-ttz-app-05.txt

Abstract

   This document discusses the applicability of "OSPF Topology-
   Transparent Zone".  It briefs the protocol and its operations first,
   and then illustrates the application scenarios of OSPF Topology-
   Transparent Zone.  This document is intended for accompanying "OSPF
   Topology-Transparent Zone" to the Internet standards track.

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on January 5, 2015.

Copyright Notice

   Copyright (c) 2014 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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Internet-Draft            Applicability of TTZ                 July 2014

   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Overview of Topology-Transparent Zone  . . . . . . . . . . . .  3
     2.1.  Definitions of Topology-Transparent Zone . . . . . . . . .  3
     2.2.  An Example of TTZ  . . . . . . . . . . . . . . . . . . . .  4
   3.  Applicability of Topology-Transparent Zone . . . . . . . . . .  6
     3.1.  One Area Network . . . . . . . . . . . . . . . . . . . . .  6
       3.1.1.  Issues on Splitting Network into Areas . . . . . . . .  6
       3.1.2.  Use of TTZ in One Area Network . . . . . . . . . . . .  7
     3.2.  Multi-Area Network . . . . . . . . . . . . . . . . . . . .  9
       3.2.1.  Issues on Splitting Network into More Areas  . . . . .  9
       3.2.2.  Use of TTZ in Multi-Area Network . . . . . . . . . . . 10
     3.3.  Use of TTZ on Routers in POP . . . . . . . . . . . . . . . 11
     3.4.  Use of TTZ on Routers in IPRAN . . . . . . . . . . . . . . 11
     3.5.  Use of TTZ on Routers from Same Vendor . . . . . . . . . . 12
     3.6.  Use of TTZ on Routers in a Power Saving Group  . . . . . . 12
   4.  Security Considerations  . . . . . . . . . . . . . . . . . . . 12
   5.  Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 12
   6.  Acknowledgement  . . . . . . . . . . . . . . . . . . . . . . . 13
   7.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     7.1.  Normative References . . . . . . . . . . . . . . . . . . . 13
     7.2.  Informative References . . . . . . . . . . . . . . . . . . 13
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 13

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1.  Introduction

   The number of routers in a network becomes larger and larger as the
   Internet traffic keeps growing.  Through splitting the network into

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