Link State Over Ethernet
draft-ymbk-lsvr-lsoe-03

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Last updated 2018-11-06
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Network Working Group                                            R. Bush
Internet-Draft                                              Arrcus & IIJ
Intended status: Standards Track                              R. Austein
Expires: May 10, 2019                                           K. Patel
                                                                  Arrcus
                                                        November 6, 2018

                        Link State Over Ethernet
                        draft-ymbk-lsvr-lsoe-03

Abstract

   Used in Massive Data Centers (MDCs), BGP-SPF and similar protocols
   need link neighbor discovery, link encapsulation data, and Layer 2
   liveness.  The Link State Over Ethernet protocol provides link
   discovery, exchanges supported encapsulations (IPv4, IPv6, ...),
   discovers encapsulation addresses (Layer 3 / MPLS identifiers) over
   raw Ethernet, and provides layer 2 liveness checking.  The interface
   data are pushed directly to a BGP-LS API, obviating the need for
   centralized controller architectures.  This protocol is intended to
   be more widely applicable to other upper layer routing protocols
   which need link discovery and characterisation.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" are to
   be interpreted as described in [RFC2119] only when they appear in all
   upper case.  They may also appear in lower or mixed case as English
   words, without normative meaning.  See [RFC8174].

Status of This Memo

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

   Internet-Drafts are working documents of the Internet Engineering
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 10, 2019.

Bush, et al.              Expires May 10, 2019                  [Page 1]
Internet-Draft          Link State Over Ethernet           November 2018

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Top Level Overview  . . . . . . . . . . . . . . . . . . . . .   5
   5.  Ethernet to Ethernet Protocols  . . . . . . . . . . . . . . .   6
     5.1.  Inter-Link Ether Protocol Overview  . . . . . . . . . . .   6
   6.  Transport Layer . . . . . . . . . . . . . . . . . . . . . . .   8
   7.  The Checksum  . . . . . . . . . . . . . . . . . . . . . . . .   8
   8.  TLV PDUs  . . . . . . . . . . . . . . . . . . . . . . . . . .  10
   9.  HELLO . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
   10. OPEN  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
   11. ACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
     11.1.  Retransmission . . . . . . . . . . . . . . . . . . . . .  13
   12. The Encapsulations  . . . . . . . . . . . . . . . . . . . . .  13
     12.1.  The Encapsulation PDU Skeleton . . . . . . . . . . . . .  14
     12.2.  Prim/Loop Flags  . . . . . . . . . . . . . . . . . . . .  15
     12.3.  IPv4 Encapsulation . . . . . . . . . . . . . . . . . . .  15
     12.4.  IPv6 Encapsulation . . . . . . . . . . . . . . . . . . .  16
     12.5.  MPLS Label List  . . . . . . . . . . . . . . . . . . . .  16
     12.6.  MPLS IPv4 Encapsulation  . . . . . . . . . . . . . . . .  16
     12.7.  MPLS IPv6 Encapsulation  . . . . . . . . . . . . . . . .  17
   13. KEEPALIVE - Layer 2 Liveness  . . . . . . . . . . . . . . . .  18
   14. Layers 2.5 and 3 Liveness . . . . . . . . . . . . . . . . . .  19
   15. The North/South Protocol  . . . . . . . . . . . . . . . . . .  19
     15.1.  Use BGP-LS as Much as Possible . . . . . . . . . . . . .  19
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