A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the BGP Enabled ServiceS WG of the IETF.
Title : Framework for EVPN Designated Forwarder Election
Extensibility
Authors : Jorge Rabadan
Satya Mohanty
Ali Sajassi
John Drake
Kiran Nagaraj
Senthil Sathappan
Filename : draft-ietf-bess-evpn-df-election-framework-04.txt
Pages : 27
Date : 2018-10-19
Abstract:
The Designated Forwarder (DF) in EVPN networks is the Provider Edge
(PE) router responsible for sending broadcast, unknown unicast and
multicast (BUM) traffic to a multi-homed Customer Equipment (CE)
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
Ethernet Segment Identifier (ESI) to the EVPN network. By default,
EVPN uses a DF Election algorithm referred to as "Service Carving"
and it is based on a modulus function (V mod N) that takes the number
of PEs in the ES (N) and the VLAN value (V) as input. This default DF
Election algorithm has some inefficiencies that this document
addresses by defining a new DF Election algorithm and a capability to
influence the DF Election result for a VLAN, depending on the state
of the associated Attachment Circuit (AC). In addition, this document
creates a registry with IANA, for future DF Election Algorithms and
Capabilities. It also presents a formal definition and clarification
of the DF Election Finite State Machine.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-df-election-framework/
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-bess-evpn-df-election-framework-04
https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-df-election-framework-04
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-evpn-df-election-framework-04
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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