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About Heartbeats

JUNOS software transmits heartbeat signals over the control link at a configured interval. The system uses heartbeat transmissions to determine the “health” of the control link. If the number of missed heartbeats has reached the configured threshold, the system assesses whether a failure condition exists.

You specify the heartbeat threshold and heartbeat interval when you configure the chassis cluster.

The system monitors the control link's status by default.

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