System, method and program to control access to virtual LAN...

Details System, method and program to control access to virtual LAN... System, method and program to control access to virtual LAN...

2011-05-03

2011-05-03

Ryman, Daniel J (Department: 2466)

Multiplex communications

Data flow congestion prevention or control

Control of data admission to the network

C370S232000, C370S392000

Reexamination Certificate

active

07936670

ABSTRACT:
System method and program for controlling access to a VLAN via a port of a VLAN switch system. In response to receipt of a message packet at the port, the switch system determines if a MAC address of the packet matches a MAC address for which the port has been programmed to recognize as a MAC address of a device authorized to communicate with the port. The MAC address of the packet does not match a MAC address for which the port has been programmed to recognize as a MAC address of a device authorized to communicate with the port. In response, the switch system blocks the packet if a rate of ill-formed packets and/or packets from an unrecognized MAC address exceeds a threshold pass rate. The threshold pass rate can be adjusted based on the rate of change of receipt of ill-formed packets and/or packets from an unrecognized MAC address.

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