VXLAN networkssuffer from ARP floodingbecause ARP requests arebroadcasted across all VTEPsin a Layer 2 domain. Toreduce ARP flooding, the following mechanisms can be enabled:
✅A. Local Proxy ARP
Allows the local VTEP to respond to ARP requests without forwarding them across the VXLAN network.
The VTEPcaches MAC-IP mappingsand replies directly to ARP requests, reducing unnecessary flooding.
✅B. ARP Broadcast Suppression
Converts ARP broadcast packets into unicast or multicast packetsto minimize network-wide flooding.
✅C. Host Information Collection
Collects and stores MAC-IP bindings of endpoints, which can be used by proxy ARP to reduce flooding.
Incorrect Answer:
❌D. Port Isolation
Port isolation prevents communication between devices within the same VLANbut doesnot help reduce ARP floodingbetween VTEPs.
Reference from Huawei HCIE-Datacom Documentation:
Huawei VXLAN Configuration Guide – ARP Optimization Techniques
HCIE-Datacom Training Material – Reducing ARP Broadcasts in VXLAN Networks
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