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Question 422 - 350-601 discussion

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An engineer must optimize ARP responses and reduce unnecessary ARP broadcasts over the VXLAN/EVPN fabric. Which action accomplishes these tasks?

A.

Configure ip proxy-arp under the VLAN SVI associated with the VXLAN VNI.

Answers
A.

Configure ip proxy-arp under the VLAN SVI associated with the VXLAN VNI.

B.

Configure ip proxy-arp within the VXLAN VNI configuration under the VTEP NVE interface.

Answers
B.

Configure ip proxy-arp within the VXLAN VNI configuration under the VTEP NVE interface.

C.

Configure suppress-arp within the VXLAN VNI configuration under the VTEP NVE interface.

Answers
C.

Configure suppress-arp within the VXLAN VNI configuration under the VTEP NVE interface.

D.

Configure suppress-arp under the VLAN SVI associated with the VXLAN VNI.

Answers
D.

Configure suppress-arp under the VLAN SVI associated with the VXLAN VNI.

Suggested answer: C

Explanation:

ARP suppression is a feature used in VXLAN/EVPN environments to optimize ARP responses and reduce unnecessary ARP broadcasts across the fabric. When ARP suppression is enabled, the local VTEP (VXLAN Tunnel Endpoint) can respond to ARP requests for known IP-to-MAC address bindings, which are learned via the BGP EVPN control plane.This prevents the need for ARP broadcasts to be sent across the entire VXLAN fabric, thus optimizing the ARP response mechanism and reducing broadcast traffic1.

Cisco Programmable Fabric with VXLAN BGP EVPN Configuration Guide2.

Community discussions on ARP suppression in VXLAN/EVPN

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asked 10/10/2024
Alysson Rodrigo Freires Neto
44 questions
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