A primary ARP server and a backup ARP server are connected to an ATM communications network. The primary and backup ARP servers each have associated ATM addresses. Also, a LIS is connected to the ATM communications network. Either the primary or backup ARP server is the active ARP server and resolves...http://www.google.com.au/patents/US5936936?utm_source=gb-gplus-sharePatent US5936936 - Redundancy mechanisms for classical internet protocol over asynchronous transfer mode networks