[bess] I-D Action: draft-ietf-bess-evpn-na-flags-04.txt

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Subject: [bess] I-D Action: draft-ietf-bess-evpn-na-flags-04.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           : Propagation of ARP/ND Flags in EVPN
        Authors         : Jorge Rabadan
                          Senthil Sathappan
                          Kiran Nagaraj
                          Wen Lin
	Filename        : draft-ietf-bess-evpn-na-flags-04.txt
	Pages           : 8
	Date            : 2019-07-03

   An EVPN MAC/IP Advertisement route can optionally carry an IPv4 or
   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. The information
   conveyed in the MAC/IP route may not be enough for the remote PE to
   reply to local ARP or ND requests. For example, if a PE learns an
   IPv6->MAC ND entry via EVPN, the PE would not know if that 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. Similarly, other information relevant to the IP->MAC
   ARP/ND entries may be needed. This document defines an extended
   community that is advertised along with an EVPN MAC/IP Advertisement
   route and carries information relevant to the ARP/ND resolution, so
   that an EVPN PE implementing a proxy-ARP/ND function can reply to ARP
   Requests or Neighbor Solicitations with the correct information.

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