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Redundancy mechanisms for classical internet protocol over asynchronous transfer mode networks

  • US 5,936,936 A
  • Filed: 04/11/1997
  • Issued: 08/10/1999
  • Est. Priority Date: 04/11/1997
  • Status: Expired due to Term
First Claim
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1. An asynchronous transfer mode (ATM) communications network with redundant address resolution protocol (ARP) servers, comprising:

  • a primary ARP server and a backup ARP server, wherein both the primary and backup ARP servers are connected to the ATM communications network and wherein the primary and backup ARP servers have associated ATM addresses;

    a logical internet protocol subnet (LIS), wherein the LIS is connected to the ATM communications network, and wherein an active ARP server resolves internet protocol (IP) addresses to ATM addresses for the LIS;

    the primary and backup ARP servers being operable in a first switchover mode of operation, whereinthe backup ARP server recognizes a removal of a redundancy virtual channel connection (VCC) between the backup ARP server and the primary ARP server; and

    the backup ARP server registers using the ATM address associated with the primary ARP server, wherein the backup ARP server takes over for the primary ARP server to become the active ARP server.

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