Switch (non-openflow) s-cssc-b240-5 provides connectivity to the Lark infrastructure:
Host 'ofswitch'
$ sudo /usr/local/bin/ovs-vsctl show 64c3b37c-2f7a-4724-baad-aa4d5fa43649 Bridge of-switch Controller "tcp:0.0.0.0:6633" is_connected: true Port of-switch Interface of-switch type: internal Port "p1p1" Interface "p1p1" Port "p1p2" Interface "p1p2" Port "p1p3" Interface "p1p3" Port "p1p4" Interface "p1p4" ovs_version: "1.9.90"
dhcp-range=128.104.50.128,128.104.50.254,255.255.255.0,20m # default route dhcp-option=3,128.104.50.1