Transparent Interconnection of Lots of Links (TRILL): MTU Negotiation
draft-ietf-trill-mtu-negotiation-08

Document Type Active Internet-Draft (trill WG)
Last updated 2017-08-08 (latest revision 2017-08-03)
Replaces draft-zhang-trill-mtu-negotiation
Stream IETF
Intended RFC status Proposed Standard
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INTERNET-DRAFT                                                  M. Zhang
Intended Status: Standards Track                                X. Zhang
Updates: 6325, 7177, 7780                                    D. Eastlake
                                                                  Huawei
                                                              R. Perlman
                                                                     EMC
                                                           S. Chatterjee
                                                                   Cisco
Expires: February 3, 2018                                 August 2, 2017

         Transparent Interconnection of Lots of Links (TRILL):
                            MTU Negotiation
                draft-ietf-trill-mtu-negotiation-08.txt

Abstract

   The base IETF TRILL protocol has a TRILL campus-wide MTU feature,
   specified in RFC 6325 and RFC 7177, that assures that link state
   changes can be successfully flooded throughout the campus while being
   able to take advantage of a campus-wide capability to support jumbo
   packets. This document specifies recommended updates to that MTU
   feature to take advantage, for appropriate link-local packets, of
   link-local MTUs that exceed the TRILL campus MTU. In addition, it
   specifies an efficient algorithm for local MTU testing. This document
   updates RFC 6325, updates RFC 7177, and updates RFC 7780.

Status of this Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
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Mingui Zhang, et al     Expires February 3, 2018                [Page 1]
INTERNET-DRAFT              MTU Negotiation               August 2, 2017

Copyright and License Notice

   Copyright (c) 2017 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. Conventions used in this document . . . . . . . . . . . . .  3
   2. Link-Wide TRILL MTU Size  . . . . . . . . . . . . . . . . . . .  3
     2.1. Operations  . . . . . . . . . . . . . . . . . . . . . . . .  5
   3. Link MTU Size Testing . . . . . . . . . . . . . . . . . . . . .  6
   4. Refreshing Sz . . . . . . . . . . . . . . . . . . . . . . . . .  8
   5. Relationship between Port MTU, Lz and Sz  . . . . . . . . . . .  9
   6. LSP Synchronization . . . . . . . . . . . . . . . . . . . . . .  9
   7. Recommendations for Traffic Link MTU Size Testing . . . . . . .  9
   8. Backwards Compatibility . . . . . . . . . . . . . . . . . . . . 10
   9. Security Considerations . . . . . . . . . . . . . . . . . . . . 10
   10. Additions to Configuration . . . . . . . . . . . . . . . . . . 11
     10.1. Per RBridge Configuration  . . . . . . . . . . . . . . . . 11
     10.2. Per RBridge Port Configuration . . . . . . . . . . . . . . 11
   11. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 11
   12. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 11
   13. References . . . . . . . . . . . . . . . . . . . . . . . . . . 11
     13.1. Normative References . . . . . . . . . . . . . . . . . . . 12
     13.2. Informative References . . . . . . . . . . . . . . . . . . 12
   Author's Addresses . . . . . . . . . . . . . . . . . . . . . . . . 14

 

Mingui Zhang, et al     Expires February 3, 2018                [Page 2]
INTERNET-DRAFT              MTU Negotiation               August 2, 2017

1. Introduction
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