Directory Assisted TRILL Encapsulation
draft-ietf-trill-directory-assisted-encap-07

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Document Type Active Internet-Draft (trill WG)
Last updated 2017-12-05
Replaces draft-dunbar-trill-directory-assisted-encap
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INTERNET-DRAFT                                              Linda Dunbar
Intended status: Proposed Standard                       Donald Eastlake
                                                                  Huawei
                                                           Radia Perlman
                                                                Dell/EMC
Expires: June 4, 2018                                   December 5, 2017

                 Directory Assisted TRILL Encapsulation
           <draft-ietf-trill-directory-assisted-encap-07.txt>

Abstract

   This draft describes how data center networks can benefit from non-
   RBridge nodes performing TRILL encapsulation with assistance from a
   directory service.

Status of This Memo

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

   Distribution of this document is unlimited. Comments should be sent
   to the authors or the TRILL working group mailing list:
   trill@ietf.org

   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
   and may be updated, replaced, or obsoleted by other documents at any
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   material or to cite them other than as "work in progress."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/1id-abstracts.html. The list of Internet-Draft
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L. Dunbar, et al                                                [Page 1]
INTERNET-DRAFT                            Directory Assisted TRILL Encap

Table of Contents

      1. Introduction............................................3
      2. Conventions Used in This Document.......................4

      3. Directory Assistance to Non-RBridge.....................5
      4. Source Nickname in Encapsulation by Non-RBridge Nodes...8

      5. Benefits of Non-RBridge Performing TRILL Encapsulation..9
      5.1. Avoid Nickname Exhaustion Issue.......................9
      5.2. Reduce MAC Tables for Switches on Bridged LANs........9

      6. Manageability Considerations...........................11
      7. Security Considerations................................11
      8. IANA Considerations....................................12

      Normative References......................................13
      Informative References....................................13

      Acknowledgments...........................................13
      Authors' Addresses........................................14

L. Dunbar, et al                                                [Page 2]
INTERNET-DRAFT                            Directory Assisted TRILL Encap

1. Introduction

   This document describes how data center networks can benefit from
   non-RBridge nodes performing TRILL encapsulation with assistance from
   a directory service and specifies a method for them to do so.

   [RFC7067] and [RFC8171] describe the framework and methods for edge
   RBridges to get MAC&VLAN <-> Edge RBridge mapping from a directory
   service instead of flooding unknown destination MAC addresses across
   a TRILL domain. If it has the needed directory information, any node,
   even a non-RBridge node, can perform the TRILL data packet
   encapsulation.  This draft describes the benefits of and a scheme for
   non-RBridge nodes performing TRILL encapsulation.

L. Dunbar, et al                                                [Page 3]
INTERNET-DRAFT                            Directory Assisted TRILL Encap

2. Conventions Used in This Document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

   AF:       Appointed Forwarder RBridge port [RFC8139].

   Bridge:   An IEEE 802.1Q compliant device. In this draft, Bridge is
             used interchangeably with Layer 2 switch.

   DA:       Destination Address.

   ES-IS:    End System to Intermediate Systems [RFC8171].

   Host:     A physical server or a virtual machine running
             applications. A host usually has at least one IP address
             and at least one MAC address.

   IS-IS:    Intermediate System to Intermediate System [RFC7176].

   SA:       Source Address.

   TRILL-EN: TRILL Encapsulating node. A node that performs the TRILL
             encapsulation but doesn't participate in RBridge's IS-IS
             routing.

   VM:       Virtual Machines.

L. Dunbar, et al                                                [Page 4]
INTERNET-DRAFT                            Directory Assisted TRILL Encap
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