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.