Extended Mobility Procedures for EVPN-IRB
draft-ietf-bess-evpn-irb-extended-mobility-02
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Internet Draft N. Malhotra, Ed.
BESS Working Group A. Sajassi
Intended Status: Proposed Standard A. Pattekar
Cisco
A. Lingala
AT&T
J. Rabadan
Nokia
J. Drake
Juniper Networks
Expires: May 5, 2020 Nov 2, 2019
Extended Mobility Procedures for EVPN-IRB
draft-ietf-bess-evpn-irb-extended-mobility-02
Abstract
Procedure to handle host mobility in a layer 2 Network with EVPN
control plane is defined as part of RFC 7432. EVPN has since evolved
to find wider applicability across various IRB use cases that include
distributing both MAC and IP reachability via a common EVPN control
plane. MAC Mobility procedures defined in RFC 7432 are extensible to
IRB use cases if a fixed 1:1 mapping between VM IP and MAC is assumed
across VM moves. Generic mobility support for IP and MAC that allows
these bindings to change across moves is required to support a
broader set of EVPN IRB use cases, and requires further
consideration. EVPN all-active multi-homing further introduces
scenarios that require additional consideration from mobility
perspective. This document enumerates a set of design considerations
applicable to mobility across these EVPN IRB use cases and defines
generic sequence number assignment procedures to address these IRB
use cases.
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
other groups may also distribute working documents as
Internet-Drafts.
Malhotra et al. Expires May 5, 2020 [Page 1]
INTERNET DRAFT EVPN-IRB Extended Mobility Nov 2, 2019
Internet-Drafts are draft documents valid for a maximum of six months
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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
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Table of Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Terminology . . . . . . . . . . . . . . . . . . . . . . . . 5
2. Optional MAC only RT-2 . . . . . . . . . . . . . . . . . . . . 6
3. Mobility Use Cases . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Host MAC+IP Move . . . . . . . . . . . . . . . . . . . . . 6
3.2 Host IP Move to new MAC . . . . . . . . . . . . . . . . . . 6
3.2.1 VM Reload . . . . . . . . . . . . . . . . . . . . . . . 7
3.2.2 MAC Sharing . . . . . . . . . . . . . . . . . . . . . . 7
3.2.3 Problem . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Host MAC move to new IP . . . . . . . . . . . . . . . . . . 8
3.3.1 Problem . . . . . . . . . . . . . . . . . . . . . . . . 8
4. EVPN All Active multi-homed ES . . . . . . . . . . . . . . . . 11
5. Design Considerations . . . . . . . . . . . . . . . . . . . . 12
6. Solution Components . . . . . . . . . . . . . . . . . . . . . 13
6.1 Sequence Number Inheritance . . . . . . . . . . . . . . . . 13
6.2 MAC Sharing . . . . . . . . . . . . . . . . . . . . . . . . 14
6.3 Multi-homing Mobility Synchronization . . . . . . . . . . . 15
Malhotra et al. Expires May 5, 2020 [Page 2]
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