When would YOU enable Proxy ARP?

Some administrators disable proxy-arp as it hides network misconfigurations.

+ The use-case raised in its original RFC is that you may decide to segment or further segment an existing network at L3 (e.g., divide a /24 into /26s) and proxy arp allows for a seamelss transition.

+ Another use-case I've seen some raise is for outside interfaces on a NAT router with more than one public address.

Are there any other modern network use cases where you'd use it?

 

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