Fast Recovery for EVPN DF Election
draft-sajassi-bess-evpn-fast-df-recovery-00
|
| Document |
Type |
|
Active Internet-Draft (individual)
|
|
Last updated |
|
2017-03-13
|
|
Stream |
|
(None)
|
|
Intended RFC status |
|
(None)
|
|
Formats |
|
plain text
pdf
html
bibtex
|
| Stream |
Stream state |
|
(No stream defined) |
|
Consensus Boilerplate |
|
Unknown
|
|
RFC Editor Note |
|
(None)
|
| IESG |
IESG state |
|
I-D Exists
|
|
Telechat date |
|
|
|
Responsible AD |
|
(None)
|
|
Send notices to |
|
(None)
|
BESS Working Group Ali Sajassi
Internet-Draft Gaurav Badoni
Intended Status: Standards Track Dhananjaya Rao
Patrice Brissette
Cisco
John Drake
Juniper
Expires: September 12, 2017 March 12, 2017
Fast Recovery for EVPN DF Election
draft-sajassi-bess-evpn-fast-df-recovery-00
Abstract
Ethernet Virtual Private Network (EVPN) solution [RFC 7432] describes
DF election procedures for multi-homing Ethernet Segments. These
procedures are enhanced further in [EVPN-DF-Election] by applying
Highest Random Weight Algorithm for DF election in order to avoid DF
status unnecessarily upon a failure. This draft makes further
improvement to DF election procedures in [EVPN-DF-Election] by
providing two options for fast DF election upon recovery of the
failed link or node associated with the multi-homing Ethernet
Segment. This fast DF election is achieved independent of number of
EVIs associated with that Ethernet Segment and it is performed via a
simple signaling between the recovered PE and each PE in the multi-
homing group.
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.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at
http://www.ietf.org/1id-abstracts.html
Sajassi et al. Expires September 12, 2017 [Page 1]
INTERNET DRAFT Fast Recovery for EVPN DF Election March 12, 2017
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html
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
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 . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Terminology . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Challenges with Existing Solution . . . . . . . . . . . . . . . 4
3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 DF Election Handshake Solution . . . . . . . . . . . . . . . 6
3.1.1 Discovery . . . . . . . . . . . . . . . . . . . . . . . 6
3.1.2 DF candidates Determination . . . . . . . . . . . . . . 6
3.1.3 DF Election Handshake . . . . . . . . . . . . . . . . . 7
3.1.4 Node Insertion . . . . . . . . . . . . . . . . . . . . . 7
3.1.5 BGP Encoding . . . . . . . . . . . . . . . . . . . . . . 8
3.1.5.1 DF Election Handshake Request Route . . . . . . . . 8
3.5.1.2 DF Election Handshake Response Route . . . . . . . . 9
3.1.6 DF Handshake Scenarios . . . . . . . . . . . . . . . . . 10
3.1.7 Interoperability . . . . . . . . . . . . . . . . . . . 13
3.2 DF Election Synchronization Solution . . . . . . . . . . . . 14
3.2.3 Advantages . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.4 Interoperability . . . . . . . . . . . . . . . . . . . . 15
3.2.5 BGP Encoding . . . . . . . . . . . . . . . . . . . . . . 15
3.2.6 Note on NTP-based synchronization . . . . . . . . . . . 16
3.2.7 An example . . . . . . . . . . . . . . . . . . . . . . . 16
4 Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . . 17
5 Security Considerations . . . . . . . . . . . . . . . . . . . . 17
Show full document text