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. 23, 2010
Filed:
Apr. 16, 2004
Sitaram Dontu, Sunnyvale, CA (US);
Faisal Mushtaq, Santa Clara, CA (US);
Shreeram Bhide, San Jose, CA (US);
Michael R. Smith, Morgan Hill, CA (US);
Ali Golshan, Palo Alto, CA (US);
Sitaram Dontu, Sunnyvale, CA (US);
Faisal Mushtaq, Santa Clara, CA (US);
Shreeram Bhide, San Jose, CA (US);
Michael R. Smith, Morgan Hill, CA (US);
Ali Golshan, Palo Alto, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A virtual network device sub-unit includes an interface to a virtual network device link and a distributed forwarding module. The interface receives a packet, and the distributed forwarding module forwards the packet received by the interface. The distributed forwarding module performs an ingress lookup if the packet includes a multicast destination address and an egress lookup if the packet includes a unicast destination address. If the packet includes a multicast destination address, the distributed forwarding module replicates the packet for each of several outgoing VLANs associated with the multicast destination address. If an additional multicast packet is received via an interface that is not coupled to a virtual network device link, the distributed forwarding module sends at most one copy of the additional multicast packet via the virtual network device link.