About the Barefoot Shell
The Cisco Nexus 3464C and Cisco Nexus 34180YC are top of the rack (ToR) switches that contain the Barefoot Networks Tofino ASICs. Because these switches are TORs, they do not feature any interchangeable fabric modules or line cards. The Barefoot Networks Tofino ASICs exist on the switches' system boards.
On the Cisco Nexus 3464C and Cisco Nexus 34180YC switches, a specific shell enables access directly to the ASICs. This shell is called the Barefoot shell.