Use to designate the ATM ARP server that will resolve ATM ARP requests for a logical IP subnet (LIS). The ATM ARP server returns the ATM physical address (NSAP) associated with an internet address in the LIS. Typically, an ATM ARP server is a device connected to the LIS, and all other devices in the LIS register their internet and ATM physical addresses with the ATM ARP server. When an ATM device is started, TCP/IP will attempt to establish a connection to the ATM ARP server for any link associated with a device that both specifies a LIS and has a corresponding ATM ARP server defined.