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Transparent Interconnection of Lots of Links (TRILL): RBridge Channel Support
RFC 7178

Internet Engineering Task Force (IETF)                   D. Eastlake 3rd
Request for Comments: 7178                                        Huawei
Category: Standards Track                                      V. Manral
ISSN: 2070-1721                                              Ionos Corp.
                                                                   Y. Li
                                                               S. Aldrin
                                                                  Huawei
                                                                 D. Ward
                                                                   Cisco
                                                                May 2014

         Transparent Interconnection of Lots of Links (TRILL):
                        RBridge Channel Support

Abstract

   This document specifies a general channel mechanism for sending
   messages, such as Bidirectional Forwarding Detection (BFD) messages,
   between Routing Bridges (RBridges) and between RBridges and end
   stations in an RBridge campus through extensions to the Transparent
   Interconnection of Lots of Links (TRILL) protocol.

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/rfc7178.

Eastlake, et al.             Standards Track                    [Page 1]
RFC 7178             TRILL: RBridge Channel Support             May 2014

Copyright Notice

   Copyright (c) 2014 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.

Table of Contents

   1. Introduction ....................................................3
      1.1. RBridge Channel Requirements ...............................3
      1.2. Relation to the MPLS Generic Associated Channel ............4
      1.3. Terminology ................................................4
   2. Inter-RBridge Channel Messages ..................................4
      2.1. RBridge Channel Message Inner Frame ........................6
           2.1.1. RBridge Channel Header ..............................6
           2.1.2. Inner Ethernet Header ...............................8
           2.1.3. Inner.VLAN Tag ......................................8
      2.2. TRILL Header for RBridge Channel Messages ..................9
      2.3. Ethernet Link Header and Trailer ..........................10
      2.4. Special Transmission and Rate Considerations ..............10
   3. Processing RBridge Channel TRILL Data Messages .................11
      3.1. Processing the RBridge Channel Header .....................12
      3.2. RBridge Channel Errors ....................................13
   4. Native RBridge Channel Frames ..................................14
   5. Indicating Support for RBridge Channel Protocols ...............16
   6. Congestion Considerations ......................................16
   7. Allocation Considerations ......................................17
      7.1. IANA Considerations .......................................17
      7.2. IEEE Registration Authority Considerations ................18
   8. Security Considerations ........................................18
   9. References .....................................................19
      9.1. Normative References ......................................19
      9.2. Informative References ....................................20
   10. Acknowledgments ...............................................20

Eastlake, et al.             Standards Track                    [Page 2]
RFC 7178             TRILL: RBridge Channel Support             May 2014

1.  Introduction

   RBridge campuses provide transparent least-cost forwarding using the

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