Cisco Technology, Inc.

Ronald Maxam

Gopal K Dommety

Thenmozhi Palaniappan

Techniques for restricting Address Resolution Protocol (ARP) table updates to updates originating from authorized subsystems is disclosed. According to an embodiment, an instruction to update an ARP table is received. It is determined whether a command interface from which the instruction originated is authorized. If the command interface is authorized, then the ARP table is updated based on the instruction. According to an embodiment, a DHCP Server may be configured to send an instruction to update an ARP table upon receiving a DHCP message indicating a network layer address that is not bound with a data link layer address. The DHCP Server may send the instruction over an authorized command interface, or be in other ways authorized to update the ARP table.

Method and apparatus for restricting address resolution protocol table updates

A method of restricting Address Resolution Protocol (ARP) table updates to updates originating from authorized subsystems is disclosed. According to one aspect of the method, an instruction to update an ARP table is received. It is determined whether a particular subsystem from which the instruction originated is authorized. If the particular subsystem is authorized, then the ARP table is updated based on the instruction.

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Renton, WA, United States of America

Ronald Maxam