Any one from the rfc7432 authors, members, and/or chairs, if they can help on 
below.
A response will surely help establish logic behind behavior observed across 
vendors.

Regards,
Saumya.

From: Dikshit, Saumya <saumya.dikshit=40hpe....@dmarc.ietf.org>
Sent: Tuesday, December 3, 2024 5:52 PM
To: bess@ietf.org; bess-cha...@ietf.org
Cc: Devarajan, Venkatavaradhan <venkatavaradhan.devara...@hpe.com>
Subject: [bess] Query related to rfc7432, multihoming : 
https://datatracker.ietf.org/doc/html/rfc7432#section-14.1.2


Hello All,



I have question in context of multiple path reachability to a MAC route 
published with an ESI in an RT-2.

Are both "Ethernet A-D per EVI route" and "Ethernet A-D per ES route" mandated 
to determine/establish reachability via more than one paths to the advertised 
MAC ?

Or Just "Ethernet A-D per ES route" should suffice to determine the same ? The 
RFC seems to mandate both for determining more than one path.s



The related excerpts from the rfc7432 
https://datatracker.ietf.org/doc/html/rfc7432#section-14.1.2<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/html/rfc7432*section-14.1.2__;Iw!!NpxR!mMMrO31ZsVA-Ltu3w56iNZRxb9pX92bqk6XiOshUPcitwhZ9LCeGgJKn5bJYYfVpUraEGr-gSaoZ3fx9K1eHungZa5WIuQrEUg$>

"A remote PE that receives a MAC/IP Advertisement

   route with a non-reserved ESI SHOULD consider the advertised MAC

   address to be reachable via all PEs that have advertised reachability

   to that MAC address's EVI/ES via the combination of an Ethernet A-D

   per EVI route for that EVI/ES (and Ethernet tag, if applicable) AND

   an Ethernet A-D per ES route for that ES."


Regards,
Saumya.
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