Transparent Interconnection of Lots of Links (TRILL): Pseudo-Nickname for Active-Active Access
RFC 7781

Document Type RFC - Proposed Standard (February 2016; No errata)
Last updated 2016-02-25
Replaces draft-hu-trill-pseudonode-nickname
Stream IETF
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Stream WG state Submitted to IESG for Publication Dec 2014
Document shepherd Donald Eastlake
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IESG IESG state RFC 7781 (Proposed Standard)
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Internet Engineering Task Force (IETF)                           H. Zhai
Request for Comments: 7781                                           JIT
Category: Standards Track                                T. Senevirathne
ISSN: 2070-1721                                               Consultant
                                                              R. Perlman
                                                                     EMC
                                                                M. Zhang
                                                                   Y. Li
                                                     Huawei Technologies
                                                           February 2016

         Transparent Interconnection of Lots of Links (TRILL):
                Pseudo-Nickname for Active-Active Access

Abstract

   The IETF TRILL (Transparent Interconnection of Lots of Links)
   protocol provides support for flow-level multipathing for both
   unicast and multi-destination traffic in networks with arbitrary
   topology.  Active-active access at the TRILL edge is the extension of
   these characteristics to end stations that are multiply connected to
   a TRILL campus as discussed in RFC 7379.  In this document, the edge
   RBridge (Routing Bridge, or TRILL switch) group providing active-
   active access to such an end station is represented as a virtual
   RBridge.  Based on the concept of the virtual RBridge, along with its
   pseudo-nickname, this document specifies a method for TRILL active-
   active access by such end stations.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7781.

Zhai, et al.                 Standards Track                    [Page 1]
RFC 7781                     Pseudo-Nickname               February 2016

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
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   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.

Zhai, et al.                 Standards Track                    [Page 2]
RFC 7781                     Pseudo-Nickname               February 2016

Table of Contents

   1. Introduction ....................................................4
      1.1. Terminology and Acronyms ...................................6
   2. Overview ........................................................7
   3. Virtual RBridge and Its Pseudo-Nickname .........................9
   4. Auto-Discovery of Member RBridges ..............................10
      4.1. Discovering Member RBridge for an RBv .....................11
      4.2. Selection of Pseudo-Nickname for an RBv ...................13
   5. Distribution Trees and Designated Forwarder ....................14
      5.1. Different Trees for Different Member RBridges .............15
      5.2. Designated Forwarder for Member RBridges ..................16
      5.3. Ingress Nickname Filtering ................................18
   6. TRILL Traffic Processing .......................................19
      6.1. Ingressing Native Frames ..................................19
      6.2. Egressing TRILL Data Packets ..............................20
           6.2.1. Unicast TRILL Data Packets .........................20
           6.2.2. Multi-Destination TRILL Data Packets ...............21
   7. MAC Information Synchronization in Edge Group ..................22
   8. Member Link Failure in an RBv ..................................23
      8.1. Link Protection for Unicast Frame Egressing ...............24
   9. TLV Extensions for Edge RBridge Group ..........................24
      9.1. PN-LAALP-Membership APPsub-TLV ............................24
      9.2. PN-RBv APPsub-TLV .........................................26
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