TRILL: Campus VLAN and Priority Regions
draft-ietf-trill-rbridge-vlan-mapping-08

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Last updated 2013-01-01
Replaces draft-perlman-trill-rbridge-vlan-mapping
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TRILL Working Group                                        Radia Perlman
INTERNET-DRAFT                                                Intel Labs
Intended status: Proposed Standard                     Anil Rijhsinghani
                                                           HP Networking
                                                         Donald Eastlake
                                                                  Huawei
                                                           Ayan Banerjee
                                                             Dinesh Dutt
                                                        Cumulus Networks
Expires June 30, 2013                                    January 1, 2013

                TRILL: Campus VLAN and Priority Regions
             <draft-ietf-trill-rbridge-vlan-mapping-08.txt>

Abstract

   Within a TRILL campus, the VLAN and priority of TRILL encapsulated
   frames is preserved. However, in some cases it may be desired that
   data VLAN and/or priority be mapped at the boundary between regions
   of such a campus. This document describes an optional RBridge feature
   to provide this function.

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 TRILL working group mailing list.

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R. Perlman, et al.                                              [Page 1]
INTERNET-DRAFT                          TRILL: VLAN and Priority Regions

Table of Contents

      1. Introduction............................................3
      1.1 TRILL Campus Regions...................................4
      1.2 Terminology............................................5

      2. Internal and Cut Set Configuration and Mappings.........6
      2.1 Multiple Crossings.....................................7
      2.2 Native Frame Considerations............................8
      2.3 More than Two Regions..................................8
      2.4 Mapping Implementation.................................9

      3. End Node Address Learning Between Regions..............11
      4. Cut Set Attraction of VLANs and Multicast..............12
      5. Advertisement of VLAN and Priority Mappings............13

      6. IANA Considerations....................................13
      7. Security Considerations................................13
      8. Normative References...................................14
      9. Informative References.................................14
      Appendix Z: Change Summary................................15

R. Perlman, et al.                                              [Page 2]
INTERNET-DRAFT                          TRILL: VLAN and Priority Regions

1. Introduction

   The IETF TRILL protocol provides transparent forwarding, with a
   number of additional features, by use of link state routing and
   encapsulation with a hop count as specified in [RFC6325].

   Devices implementing the TRILL protocol are called TRILL switches or
   RBridges (Routing Bridges). A TRILL campus is an area of TRILL
   switches and possibly bridges bounded by and interconnecting end
   stations and Layer 3 routers, analogous to a customer bridge LAN
   (which is an area of bridges interconnecting end stations, routers,
   and TRILL switches). In a TRILL campus, native frames (as defined in
   [RFC6325]), when they arrive at their first or ingress RBridge, are
   encapsulated, routed in encapsulated form via zero or more transit
   RBridges, and finally decapsulated and delivered by their egress
   RBridge or RBridges.

   TRILL switch ports have some features specified in IEEE 802.1Q as
   described in [RFC6325], with TRILL being implemented above those
   ports. Such ports provide for the association of incoming frames with
   a particular frame priority and customer VLAN. (See Appendix D of
   [RFC6325].)

   Bridge ports can map frame priorities, a process called "priority
   regeneration" in IEEE 802.1. In addition, some bridge products
   provide a feature to map the customer VLAN of incoming VLAN tagged
   frames, a process of the type called "VLAN ID translation" in IEEE
   802.1.

   Using such port features, it is possible to configure RBridge ports
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