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:
Nov. 10, 2015
Filed:
Apr. 16, 2012
Premkumar Jonnala, Hayward, CA (US);
Neha M. Shah, Santa Clara, CA (US);
Sivakumar Narayanan, Santa Clara, CA (US);
Adam J. Sweeney, San Jose, CA (US);
Silviu Dobrota, San Jose, CA (US);
Premkumar Jonnala, Hayward, CA (US);
Neha M. Shah, Santa Clara, CA (US);
Sivakumar Narayanan, Santa Clara, CA (US);
Adam J. Sweeney, San Jose, CA (US);
Silviu Dobrota, San Jose, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A method of protecting a data network from denial of service (DOS) attacks is described. The method may use various network tools to selectively block or disable portions of a data trunk experiencing a DOS attack, thereby preventing the DOS attack from reaching at least some resources on the network. In one embodiment, a network switch identifies a virtual LAN (VLAN) carrying suspect data on a data trunk. The network switch then adjusts a spanning tree for the network so that one or more ports on the compromised VLAN are blocked or disabled, while non-compromised VLANs are allowed to continue carrying data. Other approaches are also presented for avoiding the loss of valid data when a network blocks one or more VLANs or other portions of a network in response to a DOS attack or other intrusion.