A subdevice within the rlGroupMngDeviceId. Only subdevices with greatest specifity will be kept (specific UUID device is more specific than basic device which is in turn more specific than root device.
Sources for this description
Multiple manufacturers; see the original MIB MIB copies (LibreNMS/Observium Community)Dell MIB copies (LibreNMS/Observium Community)NETGEAR official product and EOL MIB downloads