OSPF Hybrid Broadcast and P2MP Interface Type
draft-ietf-ospf-hybrid-bcast-and-p2mp-05

The information below is for an old version of the document
Document Type Active Internet-Draft (ospf WG)
Last updated 2012-09-19
Replaces draft-nsheth-ospf-hybrid-bcast-and-p2mp
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state WG Document
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IESG IESG state IESG Evaluation::AD Followup
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Needs a YES. Needs 6 more YES or NO OBJECTION positions to pass.
Responsible AD Stewart Bryant
IESG note Acee Lindem (acee.lindem@ericsson.com) is the document shepherd.
Send notices to ospf-chairs@tools.ietf.org, draft-ietf-ospf-hybrid-bcast-and-p2mp@tools.ietf.org
Network Working Group                                           N. Sheth
Internet-Draft                                          Contrail Systems
Updates: 2328, 5340 (if approved)                                L. Wang
Intended status: Standards Track                                J. Zhang
Expires: March 23, 2013                                 Juniper Networks
                                                      September 19, 2012

             OSPF Hybrid Broadcast and P2MP Interface Type
              draft-ietf-ospf-hybrid-bcast-and-p2mp-05.txt

Abstract

   This document describes a mechanism to model a broadcast network as a
   hybrid of broadcast and point-to-multipoint networks for purposes of
   OSPF operation.  Neighbor discovery and maintenance as well as Link
   State Advertisement (LSA) database synchronization are performed
   using the broadcast model, but the network is represented using the
   point-to-multipoint model in the router LSAs of the routers connected
   to it.  This allows an accurate representation of the cost of
   communication between different routers on the network, while
   maintaining the network efficiency of broadcast operation.  This
   approach is relatively simple and requires minimal changes to OSPF.

   This document updates both OSPFv2 [RFC2328] and OSPFv3 [RFC5340].

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 http://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 March 23, 2013.

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Internet-Draft  OSPF Hybrid Broadcast and P2MP Intf Type  September 2012

   This document is subject to BCP 78 and the IETF Trust's Legal
   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.  Requirements Language  . . . . . . . . . . . . . . . . . . . .  4
   3.  Motivation . . . . . . . . . . . . . . . . . . . . . . . . . .  5
   4.  Operation  . . . . . . . . . . . . . . . . . . . . . . . . . .  6
     4.1.  Interface Parameters . . . . . . . . . . . . . . . . . . .  6
     4.2.  Neighbor Data Structure  . . . . . . . . . . . . . . . . .  6
     4.3.  Neighbor Discovery and Maintenance . . . . . . . . . . . .  6
     4.4.  Database Synchronization . . . . . . . . . . . . . . . . .  6
     4.5.  Generating Network LSAs  . . . . . . . . . . . . . . . . .  6
     4.6.  Generating Router and Intra-Area-Prefix-LSAs . . . . . . .  7
       4.6.1.  Stub Links in OSPFv2 Router LSA  . . . . . . . . . . .  7
       4.6.2.  OSPFv3 Intra-Area-Prefix-LSA . . . . . . . . . . . . .  7
     4.7.  Next-Hop Calculation . . . . . . . . . . . . . . . . . . .  7
     4.8.  Graceful Restart . . . . . . . . . . . . . . . . . . . . .  8
   5.  Compatibility Considerations . . . . . . . . . . . . . . . . .  9
   6.  Scalability and Deployment Considerations  . . . . . . . . . . 10
   7.  Management Considerations  . . . . . . . . . . . . . . . . . . 11
   8.  Security Considerations  . . . . . . . . . . . . . . . . . . . 12
   9.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 13
   10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 14
   11. Normative References . . . . . . . . . . . . . . . . . . . . . 15
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 16

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1.  Introduction

   OSPF [RFC2328] operation on broadcast interfaces takes advantage of
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