FYI, this draft is just a refresh of draft-lin-bess-evpn-irb-mcast-04.txt, with only some changes in the boilerplate (per RFC 8174) and some updates to the references.

On 2/13/2018 3:11 PM, internet-dra...@ietf.org wrote:
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           : EVPN Optimized Inter-Subnet Multicast (OISM) 
Forwarding
         Authors         : Wen Lin
                           Zhaohui Zhang
                           John Drake
                           Eric C. Rosen
                           Jorge Rabadan
                           Ali Sajassi
        Filename        : draft-ietf-bess-evpn-irb-mcast-00.txt
        Pages           : 72
        Date            : 2018-02-13

Abstract:
    Ethernet VPN (EVPN) provides a service that allows a single Local
    Area Network (LAN), i.e., a single IP subnet, to be distributed over
    multiple sites.  The sites are interconnected by an IP or MPLS
    backbone.  Intra-subnet traffic (either unicast or multicast) always
    appears to the endusers to be bridged, even when it is actually
    carried over the IP backbone.  When a single "tenant" owns multiple
    such LANs, EVPN also allows IP unicast traffic to be routed between
    those LANs.  This document specifies new procedures that allow inter-
    subnet IP multicast traffic to be routed among the LANs of a given
    tenant, while still making intra-subnet IP multicast traffic appear
    to be bridged.  These procedures can provide optimal routing of the
    inter-subnet multicast traffic, and do not require any such traffic
    to leave a given router and then reenter that same router.  These
    procedures also accommodate IP multicast traffic that needs to travel
    to or from systems that are outside the EVPN domain.


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