[bess] I-D Action: draft-ietf-bess-evpn-df-election-framework-00.txt
internet-drafts@ietf.org Mon, 05 March 2018 18:26 UTC
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Subject: [bess] I-D Action: draft-ietf-bess-evpn-df-election-framework-00.txt
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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-00.txt Pages : 26 Date : 2018-03-05 Abstract: The Designated Forwarder (DF) in EVPN networks is the PE responsible for sending broadcast, unknown unicast and multicast (BUM) traffic to a multi-homed CE, 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-00 https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-df-election-framework-00 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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