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This draft is a work item of the BGP Enabled ServiceS WG of the IETF.

        Title           : Propagation of IPv6 Neighbor Advertisement Flags in 
        Authors         : Jorge Rabadan
                          Senthil Sathappan
                          Kiran Nagaraj
        Filename        : draft-ietf-bess-evpn-na-flags-01.txt
        Pages           : 6
        Date            : 2018-04-09

   The MAC/IP Advertisement route specified in [RFC7432] can optionally
   carry IPv4 and IPv6 addresses associated with a MAC address. Remote
   PEs can use this information to reply locally (act as proxy) to IPv4
   ARP requests and IPv6 Neighbor Solicitation messages and
   reduce/suppress the flooding produced by the Address Resolution
   procedure. However, if the Neighbor information is learnt via EVPN,
   the PE would not know if a particular IPv6->MAC pair belongs to a
   host, a router or a host with an anycast address as this information
   is not carried in the MAC/IP route advertisements. This document
   proposes an OPTIONAL advertisement of the Flags defined in [RFC4861]
   along with the EVPN MAC/IP Advertisement routes, so that an EVPN PE
   implementing a proxy-ND function can reply to Neighbor Solicitations
   with the correct Flag information in Neighbor Advertisements.

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