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?