A Device Availability monitor checks whether a device is responding to an ICMP ECHO request in less than 3000 milliseconds and lets you know whether the device is up or down.
ICMP Ping checks a remote host for availability. Devices typically respond to ping requests within milliseconds. However, on a congested network, receive an echo packet from the remote host may take three seconds or longer.
The availability of a device is always monitored.
What You Can Do
Since device availability is always monitored, you can:
Set the alert notification options for a device that is down.
Set how long Service Center should wait before alerting you that a device is down.
To set the alert notification and how long Service Center should wait before alerting that a device is down
Do one of the following:
To add the monitor to a policy, in Service Center, click Service Delivery > Policies > Monitoring. Click the name of the monitoring policy. Click the Monitors tab.
To add the monitor to a device directly, in Service Center, click Configuration > Alerting > Monitor & Alert Rules. From the Site list, select the site where the device is located. From the Device list, select the device to which you want to add a monitor.
Click Add Monitor.
From the Choose Monitor Type list, select Device Availability.
Click Add Monitor.
In the Monitor tab, type a title for the monitor.
Optionally, type a description for the monitor.
Click Alerts.
Click Add.
Type a title for the alert.
Optionally, type a description for the alert.
Click Add AlertRule.
From the Trigger Alert When Device is Down For list, select the length of time Service Center should wait before alerting you.
Click Save.
Do one of the following:
To send an email, see Setting Alert Actions.
To create a trouble ticket, see Setting an Alert to Create a Trouble Ticket.
To self-heal, see Setting an Alert to Self-heal.
To run a script, see Setting an Alert to Run a Script.
To escalate the alert, see Escalating an Alert.
Click Save.