Adding monitoring for industrial network devices and protocols.
Example protocols such as:
CIP (Common Industrial Protocol) and its flavors: DeviceNet, CompoNet, ControlNet and EtherNet/IP
EtherCAT
PLC
Example hardware such as:
Allen-Bradley Stratix industrial managed ethernet switches
http://ab.rockwellautomation.com/Networks-and-Communications/Ethernet-IP-Network
Cisco Industrial Ethernet
http://www.cisco.com/c/en/us/products/switches/industrial-ethernet-switches/index.html
http://www.cisco.com/c/en/us/products/routers/800-series-industrial-routers/index.html