Last few days i am searching for this answer on google but i didn't get any satisfied answer so thought let me ask here. I am running small spine-leaf EVPN+VxLAN and i want to use arp suppression to reduce my broadcast.
I have couple of VNI without anycast-gateway (My requirement is all host traffic will route through Cisco ASA firewall so my all VLANs host gateway is Cisco ASA so i don't need any L3VNI or anycast-gateway)
If i enable suppress-arp on L2VNI which has no anycast-gateway in that case does arp suppression work or not?
ARP suppression reduces ARP broadcast traffic by leveraging the BGP EVPN control plane information. ARP suppression is enabled on a per-Layer 2 VNI basis. In this way, for all known endpoints, ARP requests are sent only between the endpoint and the local edge device/VTEP.
It is important to note that the ARP suppression feature works based on the knob enabled under the Layer 2 VNI, regardless of whether the default gateway is configured on the leafs.
ARP suppression is only supported for a VNI if the VTEP hosts the First-Hop Gateway (Distributed Anycast Gateway) for this VNI. The VTEP and the SVI for this VLAN have to be properly configured for the distributed Anycast Gateway operation, for example, global Anycast Gateway MAC address configured and Anycast Gateway feature with the virtual IP address on the SVI.
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