This read-write enumerated value, defaulting to disable, controls ARP proxy on an aggregate VLAN: when enabled, the router responds to ARP requests for nodes on different sub-VLANs under the same Super VLAN using its own MAC address; when disabled, it only answers ARP for its own IP addresses. Admins enable this so hosts in different sub-VLANs under the same aggregate VLAN can communicate at Layer 2 speed via ARP proxying rather than requiring full routing. For example, an admin sets this to enable(1) so a host in sub-VLAN A can resolve a host in sub-VLAN B via the router's proxy ARP response, both being part of the same Super VLAN.