TRILL Distributed Layer 3 Gateway
draft-ietf-trill-irb-02

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 2015-02-16
Replaces draft-hao-trill-irb
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Intended RFC status Proposed Standard
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Document shepherd Donald Eastlake
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Send notices to "Donald E. Eastlake 3rd" <d3e3e3@gmail.com>
TRILL Working Group                                              W. Hao
INTERNET-DRAFT                                                    Y. Li
Intended Status: Standard Track                     Huawei Technologies
                                                                  A. Qu
                                                               MediaTec
                                                             M. Durrani
                                                                Brocade
                                                         P. Sivamurugan
                                                            IP Infusion
                                                                 L. Xia
                                                                 Huawei
Technologies
Expires: August 17, 2015                              February 17, 2015

                     TRILL Distributed Layer 3 Gateway
                        draft-ietf-trill-irb-02.txt

Abstract

   Currently 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 following
   issues:

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

      2. Huge number of gateway interfaces, millions in the extreme
   case, need to be supported on the centralized gateway.

      3. Traffic bottleneck at the gateway.

   An optional TRILL distributed gateway solution that resolves these
   centralized gateway issues is specified in this document.

Status of this Memo

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

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Table of Contents

   1. Introduction ................................................ 3
   2. Conventions used in this document............................ 4
   3. Problem Statement ........................................... 5
   4. Layer 3 Traffic Forwarding Model............................. 7
   5. Distributed Gateway Solution Overview........................ 7
      5.1. Local routing information............................... 8
      5.2. Local routing information synchronization............... 9

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      5.3. Active-active access................................... 10
      5.4. Data traffic forwarding process........................ 10
   6. Distributed Layer 3 Gateway Process Example................. 11
      6.1. Control plane process.................................. 12
      6.2. Data plane process..................................... 13
   7. TRILL Protocol Extensions................................... 14
      7.1. The tenant gateway MAC APPsub-TLV...................... 15
      7.2. "SE" Flag in NickFlags APPsub-TLV...................... 15
      7.3. The Tenant Label APPsub-TLV............................ 15
      7.4. The IPv4 Prefix APPsub-TLV............................. 17
      7.5. The IPv6 Prefix APPsub-TLV............................. 18
   8. Security Considerations..................................... 18
   9. IANA Considerations ........................................ 19
   10. Normative References....................................... 19
   11. Informative References..................................... 20
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