EVPN ALL-ACTIVE ANYCAST DETECTION
draft-glendon-bess-evpn-all-active-detection-00

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Last updated 2019-11-30
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Network Working Group                                             G. Liu
Internet-Draft                                                   H. Wang
Intended status: Standards Track                     Huawei Technologies
Expires: April 30, 2020                                 October 28, 2019

                   EVPN ALL-ACTIVE ANYCAST DETECTION
            draft-glendon-bess-evpn-all-active-detection-00

Abstract

   A principal feature of EVPN is the ability to support universal
   detection including ping/trace, twamp, 2544, 1564 and so on.  This
   draft specifies a mechanism of valid universal detection in all-
   active anycast scenes based on connectivity negotiations to avoid
   detection interruption due to the inconsistency between the request
   packet path and the response packet path.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

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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   This Internet-Draft will expire on April 30, 2020.

Copyright Notice

   Copyright (c) 2019 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

Liu & Wang               Expires April 30, 2020                 [Page 1]
Internet-Draft      EVPN ALL-ACTIVE ANYCAST DETECTION       October 2019

   (https://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
     1.1.  Situation Anyalisis . . . . . . . . . . . . . . . . . . .   3
     1.2.  Alternative Solutions . . . . . . . . . . . . . . . . . .   3
     1.3.  Design Requirement  . . . . . . . . . . . . . . . . . . .   3
     1.4.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Solution Overview . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Conectivity negotiation . . . . . . . . . . . . . . . . . . .   4
   4.  Detection Protocol Extension  . . . . . . . . . . . . . . . .   5
     4.1.  Ping Packets Extension  . . . . . . . . . . . . . . . . .   6
     4.2.  2544 packets extension  . . . . . . . . . . . . . . . . .   6
   5.  Application Senario . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  EVPN over VXLAN . . . . . . . . . . . . . . . . . . . . .   7
     5.2.  EVPN over SRV6  . . . . . . . . . . . . . . . . . . . . .   7
     5.3.  Limitations . . . . . . . . . . . . . . . . . . . . . . .   7
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   8.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   8
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   A principal feature of EVPN is the ability to support universal
   detection including ping/trace, twamp, 2544, 1564 and so on.
   Universal detection may occur in single-active scenes or in all-
   active scenes.  The all-active scene is proposed in EVPN [RFC7432] .
   The draft draft-eastlake-bess-enhance-evpn-all-active specifies an
   improvement to load balancing all-active links.  But these two
   documents do not mention the detection method of the all-active
   anycast scenes.  This draft proposes a mechanism of valid universal
   detection in all-active anycast scenes based on connectivity
   negotiations to avoid detection interruption due to the inconsistency
   between the request packet path and the response packet path.

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1.1.  Situation Anyalisis

   Based on [RFC7432] and the draft draft-eastlake-bess-enhance-evpn-
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