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:
Dec. 06, 2011
Filed:
Dec. 14, 2006
Murty Subba Rama Chandra Kotha, Sunnyvale, CA (US);
Richard Manfred Pruss, Tewantin, AU;
Matthew Lawrence King, Headley Down, GB;
Jeffrey David Haag, Raleigh, NC (US);
Francois Gagne, Casselman, CA;
Murty Subba Rama Chandra Kotha, Sunnyvale, CA (US);
Richard Manfred Pruss, Tewantin, AU;
Matthew Lawrence King, Headley Down, GB;
Jeffrey David Haag, Raleigh, NC (US);
Francois Gagne, Casselman, CA;
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A service gateway maintains forwarding components operative to forward data packets within corresponding VPNs, and also maintains subscriber sessions for subscribers via respective subscriber interfaces. The association between the subscribers and the forwarding components is independent of the subscriber interfaces, such that the subscribers reachable via a given interface are associable with any forwarding component. Upon detecting an appropriate event, such as a service selection action, the service gateway modifies the forwarding components of first and second VPNs to reflect that the subscriber session is active in the second VPN and is not active in the first VPN. The service gateway also effects a change of a network address that identifies the corresponding subscriber from a first network address defined in the first VPN to a second network address defined in the second VPN. Mechanisms for effecting such a change of network address include DHCP, IPCP, RADIUS, and NAT. The service gateway employs control policies to govern the transfer of subscribers among VPNs.