Last Call: <draft-ietf-bess-evpn-na-flags-05.txt> (Propagation of ARP/ND Flags in EVPN) to Proposed Standard
The IESG <iesg-secretary@ietf.org> Fri, 14 August 2020 15:57 UTC
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From: The IESG <iesg-secretary@ietf.org>
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Subject: Last Call: <draft-ietf-bess-evpn-na-flags-05.txt> (Propagation of ARP/ND Flags in EVPN) to Proposed Standard
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CC: matthew.bocci@nokia.com, bess@ietf.org, Matthew Bocci <matthew.bocci@nokia.com>, draft-ietf-bess-evpn-na-flags@ietf.org, bess-chairs@ietf.org, martin.vigoureux@nokia.com
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Date: Fri, 14 Aug 2020 08:57:57 -0700
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The IESG has received a request from the BGP Enabled ServiceS WG (bess) to consider the following document: - 'Propagation of ARP/ND Flags in EVPN' <draft-ietf-bess-evpn-na-flags-05.txt> as Proposed Standard The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to the last-call@ietf.org mailing lists by 2020-08-28. Exceptionally, comments may be sent to iesg@ietf.org instead. In either case, please retain the beginning of the Subject line to allow automated sorting. Abstract 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 populate their ARP/ND tables on IRB interfaces or their proxy-ARP/ND tables in Broadcast Domains (BD). PEs can then reply locally (act as an ARP/ND proxy) to IPv4 ARP requests and IPv6 Neighbor Solicitation messages and reduce/suppress the flooding produced by the Address Resolution procedure. However, 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 EVPN MAC/IP Advertisement routes. 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. The file can be obtained via https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-na-flags/ No IPR declarations have been submitted directly on this I-D.