Cisco got some claims ruled unpatentable. ORDERED that claims 1, 2, 5, 6, 19, 20, 23, and 29 of the ’822 patent are unpatentable; #7,941,822 B2 https://investorshub.advfn.com/boards/read_msg.aspx?message_id=138813984 This goes with link sent not invalidated "As a whole", that is, the patent in it's entirety is not negated. These unpatentable claims may have been extra detail background technical information describing the patent as a whole and in totality. Utility patents must be novel (new), useful and non obvious. https://www.uspto.gov/patents-getting-started/general-information-concerning-patents#heading-4