[$] The rise of Linux-based networking hardware

Linux usage in networking hardware has been on the rise for sometime. During the latest Netdevconference held in Montreal this April, people talked seriously aboutLinux running on high end, "top of rack" (TOR) networking equipment. Thosedevices have long been the realm of proprietary hardware and softwarecompanies like Cisco or Juniper, but Linux seems to be making somesignificant headway into the domain. Are we really seeingthe rise of Linux in high-end networking hardware?