About Eem; Policies - Cisco Nexus 7000 Series Configuration Manual

About EEM

About EEM
EEM monitors events that occur on your device and takes action to recover or troubleshoot these events, based
on your configuration.
EEM consists of three major components:
• Event statements—Events to monitor from another Cisco NX-OS component that may require some
• Action statements—An action that EEM can take, such as sending an e-mail, or disabling an interface,
• Policies—An event paired with one or more actions to troubleshoot or recover from the event.

Policies

An EEM policy consists of an event statement and one or more action statements. The event statement defines
the event to look for as well as the filtering characteristics for the event. The action statement defines the
action EEM takes when the event occurs.
This figure shows the two basic statements in an EEM policy.
Figure 2: EEM Policy Statements
You can configure EEM policies using the command-line interface (CLI) or a VSH script.
EEM gives you a device-wide view of policy management. You configure EEM policies on the supervisor,
and EEM pushes the policy to the correct module based on the event type. EEM takes any actions for a
triggered event either locally on the module or on the supervisor (the default option).
EEM maintains event logs on the supervisor.
Cisco NX-OS has a number of preconfigured system policies. These system policies define many common
events and actions for the device. System policy names begin with two underscore characters (__).
You can create user policies to suit your network. If you create a user policy, any actions in your policy occur
after EEM triggers any system policy actions related to the same event as your policy.
You can also override some system policies. The overrides that you configure take the place of the system
policy. You can override the event or the actions.
Use the show event manager system-policy command to view the preconfigured system policies and determine
which policies that you can override.
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action, workaround, or notification.
to recover from an event.
Configuring the Embedded Event Manager