librenms-librenms/includes/definitions/cdata.yaml

os: cdata
text: 'cdata'
type: network
icon: cdata
group: cdata
mib_dir:
    - cdata
over:
    - { graph: device_bits, text: 'Device Traffic' }
    - { graph: device_processor, text: 'CPU Usage' }
    - { graph: device_mempool, text: 'Memory Usage' }
discovery:
    - 
        sysObjectID:
            - .1.3.6.1.4.1.17409
        sysObjectID_except:
            - .1.3.6.1.4.1.17409.1