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:
Mar. 30, 2010
Filed:
Sep. 14, 2005
James N. Guichard, Groton, MA (US);
W. Scott Wainner, Potomac Falls, VA (US);
Saul Adler, West Hempstead, NY (US);
Khalil A. Jabr, Austin, TX (US);
S. Scott Van DE Houten, Geneva, FL (US);
James N. Guichard, Groton, MA (US);
W. Scott Wainner, Potomac Falls, VA (US);
Saul Adler, West Hempstead, NY (US);
Khalil A. Jabr, Austin, TX (US);
S. Scott Van de Houten, Geneva, FL (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A routing mechanism provides network segmentation preservation by route distribution with segment identification, policy distribution for a given VPN segment, and encapsulation/decapsulation for each segment using an Ethernet VLAN_ID, indicative of the VPN segment (subnetwork). Encapsulated segmentation information in a message packet identifies which routing and forwarding table is employed for the next hop. A common routing instance receives the message packets from the common interface, and indexes a corresponding VRF table from the VLAN ID, or segment identifier, indicative of the subnetwork (e.g. segment). In this manner, the routing instance receives the incoming message packet, decapsulates the VLAN ID in the incoming message packet, and indexes the corresponding VRF and policy ID from the VLAN ID, therefore employing a common routing instance over a common subinterface for a plurality of segments (subnetworks) coupled to a particular forwarding device (e.g. VPN router).