NETWORK MONITORING DEVICE
First Claim
1. A network monitoring device connected to communication devices over a network, comprising:
- a recording unit in which a time at which a response is finally received from or access is finally gained by the communication device is recorded as a first time;
a receiving unit that regularly receives, from the communication device, and records a second time that is a finally passed traffic generation tame; and
an arithmetic unit that subtracts the second time from the first time, compares a result of the subtraction with a first threshold for the communication device, and gives an alarm when the result of the subtraction exceeds the first threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
A zero traffic state that is a non-communication state derived from any fault is discriminated from a no-operation state derived from, power discontinuity, and a communication device that is in the zero traffic state is efficiently sensed in consideration of a zero traffic period that is normally observed in a certain installation place or use environment. A network monitoring device cyclically notifies a maintenance person of a communication device, for which a time difference between a final access time and a finally passed traffic generation time exceeds a threshold calculated by multiplying a previously observed maximum, value of the time difference between the final access time and the finally passed traffic generation time by a coefficient that is a safety factory as a device that is In a zero traffic suspected state.
-
Citations
4 Claims
-
1. A network monitoring device connected to communication devices over a network, comprising:
-
a recording unit in which a time at which a response is finally received from or access is finally gained by the communication device is recorded as a first time; a receiving unit that regularly receives, from the communication device, and records a second time that is a finally passed traffic generation tame; and an arithmetic unit that subtracts the second time from the first time, compares a result of the subtraction with a first threshold for the communication device, and gives an alarm when the result of the subtraction exceeds the first threshold. - View Dependent Claims (2, 3, 4)
-
Specification