New revision of this draft has been published. Minor changes, mainly to align 
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Date: Friday, December 21, 2018 at 8:04 PM
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Subject: [bess] I-D Action: draft-ietf-bess-evpn-pref-df-03.txt

    A New Internet-Draft is available from the on-line Internet-Drafts 
    This draft is a work item of the BGP Enabled ServiceS WG of the IETF.
            Title           : Preference-based EVPN DF Election
            Authors         : Jorge Rabadan
                              Senthil Sathappan
                              Tony Przygienda
                              Wen Lin
                              John Drake
                              Ali Sajassi
                              Satya Ranjan Mohanty
        Filename        : draft-ietf-bess-evpn-pref-df-03.txt
        Pages           : 15
        Date            : 2018-12-21
       The Designated Forwarder (DF) in Ethernet Virtual Private Networks
       (EVPN) is defined as the PE responsible for sending Broadcast,
       Unknown unicast and Broadcast traffic (BUM) to a multi-homed
       device/network in the case of an all-active multi-homing Ethernet
       Segment (ES), or BUM and unicast in the case of single-active multi-
       The DF is selected out of a candidate list of PEs that advertise the
       same Ethernet Segment Identifier (ESI) to the EVPN network, according
       to the Default DF Election algorithm.
       While the Default Algorithm provides an efficient and automated way
       of selecting the DF across different Ethernet Tags in the ES, there
       are some use-cases where a more 'deterministic' and user-controlled
       method is required. At the same time, Service Providers require an
       easy way to force an on-demand DF switchover in order to carry out
       some maintenance tasks on the existing DF or control whether a new
       active PE can preempt the existing DF PE.
       This document proposes an extension to the Default DF election
       procedures so that the above requirements can be met.
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