Network monitoring device and method
First Claim
Patent Images
1. A network monitoring device for monitoring load on a network, comprising:
- communication control means for communicating with a plurality of destination nodes via the network and performing at least one of a first routing, a second routing and a third routing, the first routing being an intra-area OSI routing, the second routing being an inter-area OSI routing and the third routing being TCP/IP routing;
a first routing table for registering one or wore first MAC addresses of corresponding first one or more of the plurality of destination nodes when the first routing is performed;
a second routing table for registering one or more second MAC addresses of corresponding second one or more of the plurality of destination nodes that serve as a gateway for a packet transmitted to a corresponding area address when the second routing is performed;
a third routing table for registering one or more IP addresses of the second one or more of the plurality of destination nodes when the second routing is performed;
counting means for counting a number of first destination nodes from a number of the first MAC addresses registered in the first routing table, counting a number of second destination nodes from a number of the second MAC addresses registered in the second routing table, and counting a number of third destination nodes from a number of the IP addresses registered in the third routing table;
comparing means for comparing the first destination node count obtained from the first routing table with a preset first allowable value, and comparing the second destination node count obtained from the second routing table with a preset second allowable value, and comparing the third destination node count obtained from the third routing table with a preset third allowable value;
alarm output means for outputting a first alarm that the first node count is excessively large when said comparing means determines that the first node count has exceeded the first allowable value, and outputting a second alarm that the second node count is excessively large when said comparing means determines that the second node count has exceeded the second allowable value, and outputting a third alarm that the third node count is excessively large when said comparing means determines that the third node count has exceeded the third allowable value.
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Abstract
Network monitoring device and method whereby the user can be given an alarm before a guaranteed limit of packet routing is exceeded. Counting section counts the number of nodes based on packets exchanged between the nodes, and comparing section compares the node count with an allowable value. If the node count is larger than the allowable value, alarm output section outputs a message that the node count is excessively large.
41 Citations
5 Claims
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1. A network monitoring device for monitoring load on a network, comprising:
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communication control means for communicating with a plurality of destination nodes via the network and performing at least one of a first routing, a second routing and a third routing, the first routing being an intra-area OSI routing, the second routing being an inter-area OSI routing and the third routing being TCP/IP routing; a first routing table for registering one or wore first MAC addresses of corresponding first one or more of the plurality of destination nodes when the first routing is performed; a second routing table for registering one or more second MAC addresses of corresponding second one or more of the plurality of destination nodes that serve as a gateway for a packet transmitted to a corresponding area address when the second routing is performed; a third routing table for registering one or more IP addresses of the second one or more of the plurality of destination nodes when the second routing is performed; counting means for counting a number of first destination nodes from a number of the first MAC addresses registered in the first routing table, counting a number of second destination nodes from a number of the second MAC addresses registered in the second routing table, and counting a number of third destination nodes from a number of the IP addresses registered in the third routing table; comparing means for comparing the first destination node count obtained from the first routing table with a preset first allowable value, and comparing the second destination node count obtained from the second routing table with a preset second allowable value, and comparing the third destination node count obtained from the third routing table with a preset third allowable value; alarm output means for outputting a first alarm that the first node count is excessively large when said comparing means determines that the first node count has exceeded the first allowable value, and outputting a second alarm that the second node count is excessively large when said comparing means determines that the second node count has exceeded the second allowable value, and outputting a third alarm that the third node count is excessively large when said comparing means determines that the third node count has exceeded the third allowable value. - View Dependent Claims (2, 3, 4, 5)
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Specification