Frame monitoring device and frame monitoring method
AssigneeFujitsu Limited
InventorKazuaki YOSHIDA
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Abstract
One aspect of the embodiments utilizes a frame monitoring device includes a monitoring period judging unit for judging whether the period of a received frame is a monitoring period satisfying a condition for detecting the alarm and a received frame input control unit for inputting a new frame received by the frame monitoring device into the buffer when the new frame is received and it is judged by the monitoring period judging unit that the period of the frame is the monitoring period satisfying the alarm detecting condition, and discarding the new frame without inputting the frame into the buffer when it is judged by the monitoring period judging unit that the period of the frame is a monitoring period which does not satisfy the alarm detecting condition.
Claims5
A frame monitoring device for receiving from each of a plurality of outward-facing devices a frame for checking connectivity between each of the plurality of outward-facing devices every period and for detecting an alarm when the received frame is not input to the buffer sequentially for a given number of periods, comprising:
- a monitoring period judging unit for judging whether a period of a received frame is a monitoring period satisfying a condition for detecting the alarm at or subsequent to the period after a period of a frame received from an outward-facing device and input into a buffer after the received frame is input to the buffer without detecting any alarm;
- and
- a received frame input control unit for inputting a new frame received by the frame monitoring device into the buffer when the new frame is received and the monitoring period judging unit judges that the period of the frame is the monitoring period which satisfies the alarm detecting condition, and discarding the new frame without inputting the frame into the buffer when the monitoring period judging unit judges that the period of the frame is a monitoring period which does not satisfy the alarm detecting condition.
A frame monitoring method for a frame monitoring device that receives a frame for checking connectivity between each of a plurality of outward-facing devices from each of the plurality of outward-facing devices every period and that detects an alarm when the received frame is not input into a buffer sequentially for a given period, the method comprising:
- a monitoring period judging step that judges whether the period subsequent to or after the period of the received frame that was input into the buffer is a monitoring period which satisfies the condition of detecting the alarm after the frame received from the plurality of outward-facing devices was input into the buffer without detecting an alarm;
- and
- a received frame input control step for inputting a new frame received by the frame monitoring device into the buffer when the new frame is received and the monitoring period judging step judges that the frame is the monitoring period which satisfies the alarm detecting condition, and discarding the new frame without inputting the frame into the buffer when the monitoring period judging step judges that the period of the frame is a monitoring period which does not satisfy the alarm detecting condition.
Dependencies are inferred from the claim text.