L3 Aliasing and Mass Withdrawal Support for EVPN
draft-sajassi-bess-evpn-ip-aliasing-00

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Last updated 2017-07-03
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BESS Working Group                                           Ali Sajassi
Internet Draft                                             Gaurav Badoni
Category: Standard Track                                 Priyanka Warade
                                                         Suresh Pasupula
                                                           Cisco Systems

Expires: January 2, 2017                                    July 2, 2017

            L3 Aliasing and Mass Withdrawal Support for EVPN
               draft-sajassi-bess-evpn-ip-aliasing-00.txt

Abstract

   This draft proposes an extension to [RFC7432] to do Aliasing for
   Layer 3 routes that is needed for symmetric IRB to build a complete
   IP ECMP. 

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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Copyright and License Notice

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

Sajassi, et al.         Expires January 2, 2017                 [Page 1]
INTERNET DRAFT       IP Aliasing Support for EVPN>          July 2, 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
   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  Terminology . . . . . . . . . . . . . . . . . . . . . . . .  3
   2  IP Aliasing and Backup Path . . . . . . . . . . . . . . . . . .  4
     2.1 Constructing Ethernet A-D per EVPN Instance Route  . . . . .  5
   3 Fast Convergence for Routed Traffic  . . . . . . . . . . . . . .  6
     3.1 Constructing Ethernet A-D per Ethernet Segment Route . . . .  7
       3.1.1 Ethernet A-D Route Targets . . . . . . . . . . . . . . .  7
     3.2 Avoiding convergence issues by syncing IP prefixes . . . . .  7
     3.3 Handling Silent Host . . . . . . . . . . . . . . . . . . . .  8
     3.4 MAC Aging  . . . . . . . . . . . . . . . . . . . . . . . . .  8
   4 Determining Reach-ability to Unicast IP Addresses  . . . . . . .  9
     4.1 Local Learning . . . . . . . . . . . . . . . . . . . . . . .  9
     4.2 Remote Learning  . . . . . . . . . . . . . . . . . . . . . .  9
       4.2.1 Constructing MAC/IP Address Advertisement  . . . . . . .  9
       4.2.2 Route Resolution . . . . . . . . . . . . . . . . . . . .  9
   5  Forwarding Unicast Packets  . . . . . . . . . . . . . . . . . .  9
   6 Load Balancing of Unicast Packets  . . . . . . . . . . . . . . . 10
   7  Security Considerations . . . . . . . . . . . . . . . . . . . . 10
   8  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 10
   9  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     9.1  Normative References  . . . . . . . . . . . . . . . . . . . 10
     9.2  Informative References  . . . . . . . . . . . . . . . . . . 10
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 10

 

Sajassi, et al.         Expires January 2, 2017                 [Page 2]
INTERNET DRAFT       IP Aliasing Support for EVPN>          July 2, 2017

1  Introduction

                                     +---------+
                  +-------------+    |         |
                  |             |    |         |
                / |    PE1      |----|         |   +-------------+
               /  |             |    |  MPLS/  |   |             |
              /   +-------------+    |  VxLAN/ |   |     PE3     |---H3
         H1---                       |  NVGRE  |   |             |
              \   +-------------+    |         |---|             |
               \  |             |    |         |   +-------------+
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