draft-ietf-bess-evpn-df-election-framework-04.txt   draft-ietf-bess-evpn-df-election-framework-05.txt 
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Internet Draft Nokia Internet Draft Nokia
S. Mohanty, Ed. S. Mohanty, Ed.
Intended status: Standards Track A. Sajassi Intended status: Standards Track A. Sajassi
Cisco Cisco
J. Drake J. Drake
Juniper Juniper
K. Nagaraj K. Nagaraj
S. Sathappan S. Sathappan
Nokia Nokia
Expires: April 22, 2019 October 19, 2018 Expires: April 23, 2019 October 20, 2018
Framework for EVPN Designated Forwarder Election Extensibility Framework for EVPN Designated Forwarder Election Extensibility
draft-ietf-bess-evpn-df-election-framework-04 draft-ietf-bess-evpn-df-election-framework-05
Abstract Abstract
The Designated Forwarder (DF) in EVPN networks is the Provider Edge The Designated Forwarder (DF) in EVPN networks is the Provider Edge
(PE) router responsible for sending broadcast, unknown unicast and (PE) router responsible for sending broadcast, unknown unicast and
multicast (BUM) traffic to a multi-homed Customer Equipment (CE) multicast (BUM) traffic to a multi-homed Customer Equipment (CE)
device, on a given VLAN on a particular Ethernet Segment (ES). The DF device, on a given VLAN on a particular Ethernet Segment (ES). The DF
is selected out of a list of candidate PEs that advertise the same is selected out of a list of candidate PEs that advertise the same
Ethernet Segment Identifier (ESI) to the EVPN network. By default, Ethernet Segment Identifier (ESI) to the EVPN network. By default,
EVPN uses a DF Election algorithm referred to as "Service Carving" EVPN uses a DF Election algorithm referred to as "Service Carving"
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and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt http://www.ietf.org/ietf/1id-abstracts.txt
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html http://www.ietf.org/shadow.html
This Internet-Draft will expire on April 22, 2019. This Internet-Draft will expire on April 23, 2019.
Copyright Notice Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the Copyright (c) 2018 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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- Types 2-254: Unassigned. - Types 2-254: Unassigned.
- Type 255: Reserved for Experimental Use. - Type 255: Reserved for Experimental Use.
o Bitmap (2 octets) - Encodes "capabilities" to use with the DF o Bitmap (2 octets) - Encodes "capabilities" to use with the DF
Election algorithm in the field "DF Alg". This document requests Election algorithm in the field "DF Alg". This document requests
IANA to create a registry for the Bitmap field, with values 0-15, IANA to create a registry for the Bitmap field, with values 0-15,
called "DF Election Capabilities" and solicits the following called "DF Election Capabilities" and solicits the following
values: values:
- Bit 0: Unassigned. 1 1 1 1 1 1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |A| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 5 Bitmap field in the DF Election Extended Community
- Bit 0 (corresponds to Bit 24 of the DF Election Extended
Community): Unassigned.
- Bit 1: AC-DF (AC-Influenced DF Election, explained in this - Bit 1: AC-DF (AC-Influenced DF Election, explained in this
document). When set to 1, it indicates the desire to use AC- document). When set to 1, it indicates the desire to use AC-
Influenced DF Election with the rest of the PEs in the ES. Influenced DF Election with the rest of the PEs in the ES.
- Bits 2-15: Unassigned. - Bits 2-15: Unassigned.
The DF Election Extended Community is used as follows: The DF Election Extended Community is used as follows:
o A PE SHOULD attach the DF Election Extended Community to any o A PE SHOULD attach the DF Election Extended Community to any
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