EVPN Egress Protection
draft-wang-bess-evpn-egress-protection-03

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Last updated 2020-08-22
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BESS WG                                                          Y. Wang
Internet-Draft                                                   R. Chen
Intended status: Standards Track                         ZTE Corporation
Expires: 23 February 2021                                 22 August 2020

                         EVPN Egress Protection
               draft-wang-bess-evpn-egress-protection-03

Abstract

   A fast reroute framework for egress node protection is specified by
   [RFC8679] . But it cannot be applied to EVPN directly.  This document
   specifies a mechanism to apply Egress Node Protection to EVPN nodes
   and apply Egress Link Protection to EVPN EAD/EVI routes.

   In Section 6.2, this draft is compared with three other drafts.
   These drafts are:

   *  VTEP Group - [I-D.eastlake-bess-evpn-vxlan-bypass-vtep].
   *  DT2UL DX2L - [I-D.hu-bess-srv6-vpn-bypass-sid].
   *  Mirror SID - [I-D.ietf-rtgwg-srv6-egress-protection].

Status of This Memo

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   This document is subject to BCP 78 and the IETF Trust's Legal
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   license-info) in effect on the date of publication of this document.

Wang & Chen             Expires 23 February 2021                [Page 1]
Internet-Draft           EVPN Egress Protection              August 2020

   Please review these documents carefully, as they describe your rights
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Terminology and Acronyms  . . . . . . . . . . . . . . . .   3
   2.  Detailed Problem and Solution Requirement . . . . . . . . . .   5
     2.1.  Scenarios and Basic Settings  . . . . . . . . . . . . . .   5
       2.1.1.  Common Problems . . . . . . . . . . . . . . . . . . .   7
     2.2.  VXLAN-Specific Requirements . . . . . . . . . . . . . . .   7
     2.3.  SRv6-Specific Requirements  . . . . . . . . . . . . . . .   7
     2.4.  ESI-Label-Specific Requirements . . . . . . . . . . . . .   7
     2.5.  MPLS-Specific Requirements  . . . . . . . . . . . . . . .   8
   3.  Encoding the Originating Router's IP Address  . . . . . . . .   8
   4.  Control Plane Processing  . . . . . . . . . . . . . . . . . .   9
     4.1.  Common Procedures . . . . . . . . . . . . . . . . . . . .   9
     4.2.  VXLAN-Specific Procedures . . . . . . . . . . . . . . . .  10
     4.3.  SRv6-Specific Procedures  . . . . . . . . . . . . . . . .  10
     4.4.  MPLS-Specific Procedures  . . . . . . . . . . . . . . . .  11
   5.  Protection Procedures . . . . . . . . . . . . . . . . . . . .  12
     5.1.  EVPN Egress Node Protection (EENP)  . . . . . . . . . . .  12
       5.1.1.  BUM Forwarding Protection . . . . . . . . . . . . . .  12
         5.1.1.1.  Bypass-BUM Filter . . . . . . . . . . . . . . . .  12
         5.1.1.2.  NDF-Bias Rules for Bypass-BUM filter  . . . . . .  13
       5.1.2.  Unicast Forwarding Protection . . . . . . . . . . . .  13
     5.2.  Egress ESI Link Protection (EELP) . . . . . . . . . . . .  14
       5.2.1.  Source Squelching Rules . . . . . . . . . . . . . . .  14
       5.2.2.  SRv6-specific EELP Rules  . . . . . . . . . . . . . .  15
       5.2.3.  MPLS-specific EELP Rules  . . . . . . . . . . . . . .  15
   6.  Comparison with Other Drafts  . . . . . . . . . . . . . . . .  15
     6.1.  Questions . . . . . . . . . . . . . . . . . . . . . . . .  16
     6.2.  Summary Comparisons . . . . . . . . . . . . . . . . . . .  17
     6.3.  Detailed Comparisons with VTEP Group  . . . . . . . . . .  18
     6.4.  Detailed Comparisons with DT2UL and DX2L  . . . . . . . .  18
     6.5.  Detailed Comparisons with Mirror SID  . . . . . . . . . .  19
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  20
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  20
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  20
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