![]() Typically, the host that sent the ARP request then sends its packets to the switch that has the ARP proxy. The ARP proxy is aware of the location of the traffic destination, and offers its own MAC address as the final destination.įor example, if Proxy ARP is enabled on a routing switch connected to two subnets (10.10.10.0/24 and 20.20.20.0/24), the routing switch can respond to an ARP request from 10.10.10.69 for the MAC address of the device with IP address 20.20.20.69. Proxy ARP allows a routing switch to answer ARP requests from devices on one network on behalf of devices on another network. ARP is enabled by default and cannot be disabled. ARP requests are broadcast to all devices on the local network segment and are not forwarded by routers. Instead, the Neighbor discovery protocol is used.)ĪRP operates at layer 2. For example, on an Ethernet network, ARP maps layer 3 IPv4 network addresses to layer 2 MAC addresses. ARP (Address Resolution Protocol) is used to map the network address assigned to a device to its physical address.
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June 2023
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