Net Navigation Systems  sued Arista Networks, Avaya, Ericsson, and Extreme Networks. Each of the four suits asserts two patents related to processing of network data and selection of data for network transmission (6,434,145, 6,625,122). The cases against Avaya and Arista include a third patent related to processing cells in an ATM switch (5,901,147). The defendants’ router and switch products are accused of infringement. Net Navigation asserted ‘145, ‘122, and ‘147 in three suits against Alcatel-Lucent, AT&T, Cisco, and Huawei in October 2011. Court documents in the AT&T and Cisco litigation indicate that Cisco reached a settlement with Net Navigation in December 2013 and was dismissed with prejudice; AT&T was severed from the case and dismissed without prejudice in April 2013. In the case against Alcatel and AT&T, defendants were dismissed with prejudice after about a year of litigation. After nearly two years of litigation, Net Navigation dismissed its claims against Huawei without prejudice. The asserted patents originated with MMC Networks, which was acquired by Applied Micro Circuits Corporation (AMCC) in October 2000. AMCC assigned ‘145, ‘122, and ‘147 to Net Navigation in June 2011. RPX reviewed the patents in an open market opportunity in February 2011 (MMC Networks-OMA). 4/23, Texas Eastern District Court, 4:14cv00251, 4:14cv00252, 4:14cv00253, 4:14cv00254