[bess] VXLAN BGP EVPN Question

[Gyan Mishra <[e-mail]>]

All

Had a question related to vxlan BGP EVPN architecture specifications
defined in BGP EVPN NVO3 overlay RFC 8365 and VXLAN data plane RFC 7348.

In a Data Center environment where you have a multiple PODs individual
fabrics per POD connected via a super spine extension using a Multi site
feature doing auto rewrite of RTs to stitch the NVE tunnel between pods
similar to inter-as option A.

So in this scenario where you have vlan sprawl everywhere with L2 and L3
VNIs everywhere as if it were a a single L2 domain.  The topology is a
typical vxlan spine leaf topology where the L3 leafs are the TOR switch so
very small physical  L2 fault domain. So I was wondering if with the vxlan
architecture if this feature below is possible or if their is a way to do
so in the current specification.

Cisco use to have a DC product called “fabric path” which was based on
conversation learning.

Is there any way with existing vxlan BGP evpn specification or maybe future
enhancement to have a Mac conversation learning capability so that only the
active mac’s that are part of a conversations flow are the mac that are
flooded throughout the vxlan fabric.  That would really help tremendously
with arp storms so if new arp entries are generated locally on a leaf they
are not flooded through the fabric unless their are active flows between
leafs.

Also is there a way to filter type 2 Mac mobility routes between leaf
switches at the control plane level based on remote vtep or maybe other
parameters.  That would also reduce arp storms BUM traffic.

Kind regards

Gyan
-- 

Gyan  Mishra

Network Engineering & Technology

Verizon

Silver Spring, MD 20904

Phone: [phone]

Email: [e-mail]