When you use Enterprise Manager to manage devices in the network, you can get a general overview of the status of devices from the device list screen. You can view the device list by clicking the Devices link in the Enterprise Management section of the Main tab on the navigation pane.
If you need to notify individuals in your organization about certain conditions in the network, you can configure custom alerts for managed devices in the network. This can help you improve response time when a certificate expires on a managed device, or if a managed device becomes unreachable. Additionally, you can configure these alerts to work with any existing network management servers in the network.
Status icons offer the quickest insight into the state of managed devices in the network. The icons indicate whether Enterprise Manager can successfully communicate with managed devices and, if the devices are part of a high availability system, their active or standby failover state.
If Enterprise Manager might not be able to communicate with a managed device, the status icon changes so that a red X appears in the middle of the device icon. There are a variety of reasons that Enterprise Manager might not be able to communicate with a managed device: the device is rebooting, the management cable became disconnected, or the iControl port was closed or blocked. If you notice a device unreachable icon, you can try to remotely log into the device to further investigate the device's status.
Enterprise Manager can contact the device, and the device is in Active Mode
Enterprise Manager can contact the device and the device is in Standby Mode
Enterprise Manager cannot currently contact the device
One of the advantages of using Enterprise Manager as a device management appliance is that you can monitor the progress of several management tasks at once. You can use the task list to survey the status of running, completed, and pending tasks.
You can also use the task list as a starting point to finding additional information about a particular task, or for setting up new tasks such as a software upgrade or rotating archive schedule.
The task list provides an overview of all tasks initiated by Enterprise Manager. You can also use the task list as a starting point for software upgrades and for scheduling rotating archives.
In the navigation pane, expand Enterprise Management and click Tasks.
The task list provides information relevant to the task, including the overall progress of the task, and the task initialization time. If you click the name of a task, the task properties screen opens to provide additional task details and options.
When a task completes, a record remains in the task list to assist you in tracking when upgrades, device discoveries, and configuration archive management tasks occurred. These records remain in the list until you delete them.
Check the Select box to the left of a completed task name, and click the Delete button below the list.
Enterprise Manager deletes the task from the Enterprise Manager database, and removes the task from the task list.
When you click a task name in the task list, the task properties screen opens. This screen gives you additional details about the task you selected. Depending on the type of task you are looking at, the task properties screen can display the status of each individual device in a discovery task, software upgrade, or hotfix installation.
If errors occur in the task, you can click the Details link in the Task Summary table to view even more detailed information and find suggestions about a particular job.
If there are pending jobs in the task, you can cancel any pending jobs by clicking the Cancel Pending Items button below the Task Summary table.
Using Enterprise Manager as your network management appliance gives you custom alerting options to help you better maintain the health of your network. You can configure custom alerts to notify you or others if a device becomes unreachable by Enterprise Manager, the completion or failure of a software or hotfix installation, and if a device system clock differs from the Enterprise Manager clock.
When you configure custom alerts, you can apply them to individual devices, or to a device group.
You can also create alerts for the Enterprise Management device itself so that you can maintain the health of your management system.
Before you create alerts, you can configure alert defaults for an alert email recipient and you can specify the address of a remote syslog server for alerting.
When an alert is triggered, if you define a default email address, Enterprise Manager can send an alert notification to this address. Optionally, Enterprise Manager can send a syslog event to a remote syslog server that you specify when an alert is triggered.
To help maintain the health of the Enterprise Manager device, you can configure system alerts to notify you when CPU, disk, or memory usage meets or exceeds a particular threshold. You can set these options on the EM Alerts screen.
Enterprise Manager can take actions on a wide variety of alerts that can assist you in managing your F5 Networks devices. The alerts that you can set include:
If Enterprise Manager loses the connection to a managed device, the status icon in the device list changes to indicate this problem. However, if you need to immediately notify someone as soon as Enterprise Manager loses a connection to a managed device, you can configure a custom alert to notify you or others. Recipients of this alert email can then take the necessary action to get your managed device back online. This is a continuous alert that checks the connection every 10 minutes and triggers another alert if the device is unreachable.
Because Enterprise Manager authenticates itself to managed devices on the iControl port through a certificate that it creates when it first discovers a device in the network, there are a variety of reasons that the connection could be interrupted.
The connection could be interrupted if the managed device is rebooting, or if someone closed the management port or removed the management cable. It is also possible that a system clock differential between Enterprise Manager and a managed device caused the management certificate to expire.
Because it is likely that you have a large number of certificates defined on managed devices in the network, you may want a way to automatically monitor these certificates and warn you when they near expiration.
Although you can use the certificates list to view a broad overview of certificates on devices in the network, you can create a custom alert to notify a specific user when a certificate expires or is within a specific number of days of expiration.
When you define the alert, you can specify a notification to repeat at specified intervals until the certificate expires.
When you start a software upgrade or hotfix installation task, you may not be able to monitor the overall status of the task. If you start an upgrade of multiple devices, it may not be feasible to manually check to see if a particular device is upgraded. You can create a custom alert to notify you or others when a device completes an upgrade or installation task.
Alternately, you can use the Task List to get a broad overview of all running tasks. If you click the name of a task on the task list, it opens the task properties screen where you can view detailed information about devices involved in the task, including which devices have completed the upgrade or installation.
Because you can upgrade multiple devices in a software upgrade or hotfix installation, you may not be able to closely monitor each job. You can create a custom alert to notify you or others if an upgrade or installation job fails. The user that receives the alert email can then investigate why the upgrade or installation failed, make corrections, and schedule a new task.
You can also use the Task List to find running tasks that encountered errors during an upgrade or install process.
When Enterprise Manager adds a device to the managed device list, it creates a certificate that it uses to authenticate itself to the managed device. If the system clock of Enterprise Manager gets too far out of sync (15 minute difference between system clocks) with a managed device, this invalidates the management certificate, and can result in Enterprise Manager losing management privileges on a device.
To prevent this scenario, you can set an alert that will notify you or others whenever the Enterprise Manager and managed device system clocks skew too far out of sync. Then, whoever receives the alert can log on to the managed device and make sure the system clock is closely matched with Enterprise Manager. This is a continuous alert that checks the clock skew every 10 minutes, and triggers another alert if the systems clocks are out of sync.
When you configure a rotating archive schedule, Enterprise Manager creates a device configuration at the interval you specified. Because this is an automated process, you may not know if the configuration archive was created properly.
You can create a custom alert to notify you or others whenever a scheduled configuration archive process encounters an error. A user who receives an alert email can investigate why an archive was not created or can manually create a configuration archive.
Creating an alert for a device or device group involves naming the alert, defining the alert condition, setting the alert action, and assigning the alert to one or more devices. You can do this from one screen, the New Alert screen.
Once you create an alert, the alert definition is flexible enough to easily apply to additional devices and device groups. Conversely, you can remove devices and device groups from a particular alert. You can also change the alert actions or email recipients of an alert, on the alert properties screen. From the Device Alerts screen, clicking the name of an alert opens the alert properties screen.
See the online help for additional details about changing specific properties of an alert.
If you no longer need an alert, you can delete the alert using the Device Alerts screen. Once you remove an alert from the alert list, it no longer applies to any devices or groups that you assigned.
From the Device Alerts screen, in the alert list, check the Select box to the left of an alert, and click the Delete button below the list.