OSPF Hybrid Broadcast and P2MP Interface Type
draft-ietf-ospf-hybrid-bcast-and-p2mp-03

The information below is for an old version of the document
Document Type Active Internet-Draft (ospf WG)
Last updated 2012-07-25 (latest revision 2012-07-03)
Replaces draft-nsheth-ospf-hybrid-bcast-and-p2mp
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state WG Document
Consensus Unknown
Document shepherd None
IESG IESG state IESG Evaluation
Telechat date
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                                                   L. Wang
Updates: 2328, 5340 (if approved)                               J. Zhang
Intended status: Standards Track                        Juniper Networks
Expires: January 4, 2013                                    July 3, 2012

             OSPF Hybrid Broadcast and P2MP Interface Type
              draft-ietf-ospf-hybrid-bcast-and-p2mp-03.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 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
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   This Internet-Draft will expire on January 4, 2013.

Copyright Notice

   Copyright (c) 2012 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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   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
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   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
   the broadcast capabilities of the underlying medium for doing
   neighbor discovery and maintenance.  Further, it uses a Designated
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