Monitoring device monitoring network

A semiconductor integrated circuit, comprising:

• a plurality of comparators;
• and
• a warning counter, wherein:
• a first comparator of the plurality of comparators is configured to determine whether a reception interval of a target data group is normal or anomalous;
• a second comparator of the plurality of comparators is configured to determine whether a total count of a target data having been received and included in the target data group is normal or anomalous by comparing the total count of the target data received against an expected total count of target data, and each reception interval between the target data is normal or anomalous;
• and
• the warning counter is configured to individually count anomalies determined by the first comparator, and anomalies determined by the second comparator.

A network device, comprising:

• a plurality of controllers;
• and
• a monitoring device configured to monitor data output from each of the plurality of controllers, wherein the monitoring device comprises:
• a first comparator configured to determine whether a reception interval of a target data group is normal or anomalous;
• a second comparator configured to determine whether a total count of a target data having been received and included in the target data group is normal or anomalous by comparing the total count of the target data received against an expected total count amount of target data, and each reception interval between the target data is normal or anomalous;
• and
• a warning counter configured to individually count anomalies determined by the first comparator, and anomalies determined by the second comparator.