TRILL Distributed Layer 3 Gateway
draft-ietf-trill-irb-13

The information below is for an old version of the document
Document Type Active Internet-Draft (trill WG)
Authors Hao Weiguo  , Li Yizhou  , Andrew Qu  , Muhammad Durrani  , Ponkarthick Sivamurugan  , Liang Xia 
Last updated 2016-06-30 (latest revision 2016-06-06)
Replaces draft-hao-trill-irb
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state Submitted to IESG for Publication
Document shepherd Donald Eastlake
Shepherd write-up Show (last changed 2016-02-08)
IESG IESG state IESG Evaluation::Revised I-D Needed
Consensus Boilerplate Yes
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Responsible AD Alia Atlas
Send notices to (None)
IANA IANA review state IANA OK - Actions Needed
TRILL Working Group                                              W. Hao
INTERNET-DRAFT                                                    Y. Li
Intended Status: Standard Track                                  Huawei
                                                                  A. Qu
                                                               MediaTec
                                                             M. Durrani
                                                                  Cisco
                                                         P. Sivamurugan
                                                            IP Infusion
                                                                 L. Xia
                                                                 Huawei
Expires: December 7, 2016                                  June 7, 2016

                     TRILL Distributed Layer 3 Gateway
                        draft-ietf-trill-irb-13.txt

Abstract

   The base TRILL protocol provides optimal pair-wise data frame
   forwarding for layer 2 intra-subnet traffic but not for layer 3
   inter-subnet traffic. A centralized gateway solution is typically
   used for layer 3 inter-subnet traffic forwarding but has the
   following issues:

         1. Sub-optimum forwarding paths for inter-subnet traffic.

         2. A centralized gateway may need to support a very large
   number of gateway interfaces in a data center, one per tenant per
   data label used by that tenant, to provide interconnect
   functionality for all the layer 2 virtual networks in a TRILL campus.

         3. A traffic bottleneck at the gateway.

   This document specifies an optional TRILL distributed gateway
   solution that resolves these centralized gateway issues.

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), its areas, and its working groups.  Note that
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   Drafts.

   Internet-Drafts are draft documents valid for a maximum of six
   months and may be updated, replaced, or obsoleted by other documents

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   at any time.  It is inappropriate to use Internet-Drafts as
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   The list of current Internet-Drafts can be accessed at
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Copyright Notice

   Copyright (c) 2016 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
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   document must include Simplified BSD License text as described in
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   warranty as described in the Simplified BSD License.

Table of Contents

   1. Introduction ................................................ 3
      1.1. Document Organization................................... 3
   2. Conventions used in this document............................ 4
   3. Simplified Example and Problem Statement..................... 5
      3.1. Simplified Example...................................... 5
      3.2. Problem Statement Summary............................... 8
   4. Layer 3 Traffic Forwarding Model............................. 9
   5. Distributed Gateway Solution Details......................... 9
      5.1. Local Routing Information.............................. 10
      5.2. Local Routing Information Synchronization.............. 11
      5.3. Active-active Access................................... 13
      5.4. Data Traffic Forwarding Process........................ 14
   6. Distributed Layer 3 Gateway Process Example................. 15
      6.1. Control plane process.................................. 16
      6.2. Data Plane Process..................................... 17
   7. TRILL Protocol Extensions................................... 18
      7.1. The Tenant Label and Gateway MAC APPsub-TLV............ 19

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      7.2. "SE" Flag in NickFlags APPsub-TLV...................... 20
      7.3. The IPv4 Prefix APPsub-TLV............................. 20
      7.4. The IPv6 Prefix APPsub-TLV............................. 21
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