TRILL Distributed Layer 3 Gateway
draft-ietf-trill-irb-00

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 2014-11-11 (latest revision 2014-11-09)
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: May 14, 2015                                  November 10, 2014

                   TRILL Distributed Layer 3 Gateway
                      draft-ietf-trill-irb-00.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, 16 million in 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.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as
   Internet-Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
 

Hao & Li, et al                                                 [Page 1]
INTERNET DRAFT     TRILL Distributed Layer 3 Gateway       November 2014

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Copyright and License Notice

   Copyright (c) 2013 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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Table of Contents

   1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2 Conventions Used in This Document  . . . . . . . . . . . . . . .  4
   3 Problem Statement  . . . . . . . . . . . . . . . . . . . . . . .  5
   4 Layer 3 Traffic Forwarding Model . . . . . . . . . . . . . . . .  6
   5 Distributed Gateway Solution Overview  . . . . . . . . . . . . .  7
     5.1. Local routing information . . . . . . . . . . . . . . . . .  8
     5.2. Local routing information synchronization . . . . . . . . .  9
     5.3. Data traffic forwarding process . . . . . . . . . . . . . . 10
   6 Distributed Layer 3 Gateway Process Example  . . . . . . . . . . 10
     6.1. Control plane process . . . . . . . . . . . . . . . . . . . 11
     6.2. Data plane process  . . . . . . . . . . . . . . . . . . . . 12
   7 TRILL Protocol Extensions  . . . . . . . . . . . . . . . . . . . 13
     7.1. The tenant gateway MAC APPsub-TLV . . . . . . . . . . . . . 14
     7.2. The tenant Label APPsub-TLV . . . . . . . . . . . . . . . . 14
     7.3. The IPv4 Prefix APPsub-TLV  . . . . . . . . . . . . . . . . 15
     7.4. The IPv6 Prefix APPsub-TLV  . . . . . . . . . . . . . . . . 16
   8 Security Considerations  . . . . . . . . . . . . . . . . . . . . 16
   9 IANA Considerations  . . . . . . . . . . . . . . . . . . . . . . 17
 

Hao & Li, et al                                                 [Page 2]
INTERNET DRAFT     TRILL Distributed Layer 3 Gateway       November 2014

   10 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 17
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