×

Packet filtering in connection-based switching networks

  • US 6,510,151 B1
  • Filed: 09/19/1996
  • Issued: 01/21/2003
  • Est. Priority Date: 09/19/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of filtering a plurality of packets received by a switch having a set of known virtual connections, and the switch further having a fast port coupled to a shared-media subnetwork of a connection-oriented communication network, the set of known virtual connections being programmed through the shared media subnetwork, and a second port, the method comprising the steps of:

  • storing information on the set of known virtual connections for the connection-oriented communication network for the switch;

    forwarding a packet, corresponding to one of the known virtual connections from the first port to the second port, wherein the one of the known virtual connections is programmed through the shared-media subnetwork; and

    selectively in-line filtering one of the packets, received by the switch on the first port, that does not correspond to one of the set of known virtual connections, wherein the step of selectively in-line filtering comprises the steps of;

    maintaining an in-line filter table based on a plurality of destination addresses corresponding to packets to be filtered; and

    for one of the packets that does not correspond to one of the known connections, adding an entry to the in-line filter table corresponding to a destination address for that packet.

View all claims
  • 14 Assignments
Timeline View
Assignment View
    ×
    ×