Figure 3: No IP Classless Routing To prevent the device from forwarding packets that are destined for unrecognized subnets to the best supernet route possible, you can disable classless routing behavior. Address Resolution You can control interface-specific handling of IP by using address resolution. A device using IP can have both a local address or MAC address, which uniquely defines the device on its local segment or LAN, and a network address, which identifies the network to which the device belongs. In a switch stack, network communication uses a single MAC address and the IP address of the stack. Note Configuring IP Unicast Routing Address Resolution Configuring IP Unicast Routing 6