Patent ID: 7434254
Filing Date: 2008-10-07
Classification: H04L

Abstract:
1. A method for automatic filter generation and maintenance, the method comprising the computer-implemented steps of: detecting, at a first network element, from a network packet, an Internet Protocol (IP) address and a first Media Access Control (MAC) address; wherein the IP address and the first MAC address are used by the first network element as a basis to determine that the IP address and another MAC address that are detected from another network packet is an illegal binding and wherein said another MAC address is different from the first MAC address; causing a second network element to, based on the IP address and the first MAC address, create, in an Address Resolution Protocol (ARP) filter, one or more rules that cause the second network element to prevent an ARP table from including a binding that includes only one of the IP address and the first MAC address; wherein the second network element is different from the first network element; and in response to detecting, at the first network element, from said another network packet, the IP address and said another MAC address, preventing the ARP table from including the illegal binding that includes the IP address and said another MAC address.