The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2012
Filed:
Apr. 14, 2009
Gopal Dommety, San Jose, CA (US);
Thenmozhi Palaniappan, Sunnyvale, CA (US);
Ronald Maxam, Renton, WA (US);
Gopal Dommety, San Jose, CA (US);
Thenmozhi Palaniappan, Sunnyvale, CA (US);
Ronald Maxam, Renton, WA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
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.