Transparent Interconnection of Lots of Links (TRILL) Single Area Border RBridge Nickname for Multilevel
draft-ietf-trill-multilevel-single-nickname-04

Document Type Active Internet-Draft (trill WG)
Last updated 2017-07-31
Replaces draft-zhang-trill-multilevel-single-nickname
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INTERNET-DRAFT                                                  M. Zhang
Intended Status: Proposed Standard                           D. Eastlake
                                                                  Huawei
                                                              R. Perlman
                                                                     EMC
                                                               M. Cullen
                                                       Painless Security
                                                                 H. Zhai
                                                                     JIT
Expires: February 2, 2018                                 August 1, 2017

          Transparent Interconnection of Lots of Links (TRILL)
           Single Area Border RBridge Nickname for Multilevel
           draft-ietf-trill-multilevel-single-nickname-04.txt

Abstract

   A major issue in multilevel TRILL is how to manage RBridge nicknames.
   In this document, the area border RBridge uses a single nickname in
   both Level 1 and Level 2. RBridges in Level 2 must obtain unique
   nicknames but RBridges in different Level 1 areas may have the same
   nicknames.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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Copyright and License Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors. All rights reserved.
 

Mingui Zhang, et al     Expires February 2, 2018                [Page 1]
INTERNET-DRAFT      Single Nickname Multiple Levels       August 1, 2017

   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
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Table of Contents

   1. Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2. Acronyms and Terminology  . . . . . . . . . . . . . . . . . . .  3
   3. Nickname Handling on Border RBridges  . . . . . . . . . . . . .  3
     3.1. Actions on Unicast Packets  . . . . . . . . . . . . . . . .  4
     3.2. Actions on Multi-Destination Packets  . . . . . . . . . . .  5
   4. Per-flow Load Balancing . . . . . . . . . . . . . . . . . . . .  6
     4.1. Ingress Nickname Replacement  . . . . . . . . . . . . . . .  6
     4.2. Egress Nickname Replacement . . . . . . . . . . . . . . . .  7
   5. Protocol Extensions for Discovery . . . . . . . . . . . . . . .  7
     5.1. Discovery of Border RBridges in L1  . . . . . . . . . . . .  7
     5.2. Discovery of Border RBridge Sets in L2  . . . . . . . . . .  7
   6. One Border RBridge Connects Multiple Areas  . . . . . . . . . .  8
   7. E-L1FS/E-L2FS Backwards Compatibility . . . . . . . . . . . . .  9
   8. Security Considerations . . . . . . . . . . . . . . . . . . . .  9
   9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . .  9
     9.1. TRILL APPsub-TLVs . . . . . . . . . . . . . . . . . . . . .  9
   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     10.1. Normative References . . . . . . . . . . . . . . . . . . . 10
     10.2. Informative References . . . . . . . . . . . . . . . . . . 10
   Appendix A. Clarifications . . . . . . . . . . . . . . . . . . . . 11
     A.1. Level Transition  . . . . . . . . . . . . . . . . . . . . . 11
   Author's Addresses . . . . . . . . . . . . . . . . . . . . . . . . 12

1. Introduction

   TRILL multilevel techniques are designed to improve TRILL scalability
   issues. As described in [MultiL], there have been two proposed
   approaches. One approach, which is referred as the "unique nickname"
   approach, gives unique nicknames to all the TRILL switches in the
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