FIB Reduction in Virtual Subnet
draft-xu-l3vpn-virtual-subnet-fib-reduction-01

The information below is for an old version of the document
Document Type Active Internet-Draft (candidate for bess WG)
Authors Xiaohu Xu  , Susan Hares  , Fan Yongbing  , Christian Jacquenet  , Truman Boyes  , Brendan Fee  , Wim Henderickx 
Last updated 2015-01-15 (latest revision 2014-08-04)
Replaced by draft-ietf-bess-virtual-subnet-fib-reduction
Stream Internent Engineering Task Force (IETF)
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Document shepherd Martin Vigoureux
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Send notices to bess-chairs@tools.ietf.org, bess@ietf.org, draft-xu-l3vpn-virtual-subnet-fib-reduction.all@tools.ietf.org, "Martin Vigoureux" <martin.vigoureux@alcatel-lucent.com>
Network Working Group                                              X. Xu
Internet-Draft                                                    Huawei
Intended status: Informational                                  S. Hares
Expires: February 2, 2015                                     Individual
                                                                  Y. Fan
                                                           China Telecom
                                                            C. Jacquenet
                                                                  Orange
                                                                T. Boyes
                                                            Bloomberg LP
                                                                  B. Fee
                                                        Extreme Networks
                                                           W. Henderickx
                                                          Alcatel-Lucent
                                                          August 1, 2014

                    FIB Reduction in Virtual Subnet
             draft-xu-l3vpn-virtual-subnet-fib-reduction-01

Abstract

   Virtual Subnet is a BGP/MPLS IP VPN-based subnet extension solution
   which is intended for building Layer3 network virtualization overlays
   within and/or across data centers.  This document describes a
   mechanism for reducing the FIB size of PE routers in the Virtual
   Subnet context.

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 February 2, 2015.

Xu, et al.              Expires February 2, 2015                [Page 1]
Internet-Draft       FIB Reduction in Virtual Subnet         August 2014

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
   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
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   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Solution Description  . . . . . . . . . . . . . . . . . . . .   3
   4.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   5
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   Virtual Subnet [I-D.ietf-l3vpn-virtual-subnet] is a BGP/MPLS IP VPN
   [RFC4364] -based subnet extension solution which is intended for
   building Layer3 network virtualization overlays within and/or across
   data centers.  In the Virtual Subnet context, since CE host routes of
   a given VPN instance need to be exchanged among PE routers
   participating in that VPN instance, the resulting forwarding table
   (a.k.a.  FIB) size of PE routers may become a big concern in large-
   scale data center environment where they may need to install a huge
   amount of host routes into their forwarding tables.  In some cases
   where host routes need to be maintained on the control plane, it
   needs a method to reduce the FIB size of PE routers without any
   change to the RIB and the routing table.  Therefore, this document
   proposes a very simple mechanism for reducing the FIB size of PE
   routers.  The basic idea of this mechanism is: Those host routes
   learnt from remote PE routers are selectively installed into the FIB
   while the remaining routes including local CE host routes are
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