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Chapter 32 Configuring Embedded Event Manager
Configuring Embedded Event Manager

Embedded Event Manager Environment Variables

EEM uses environment variables in EEM policies. These variables are defined in a EEM policy tool
command language (TCL) script by running a CLI command and the event manager environment
command.
• User-defined variables
Defined by the user for a user-defined policy.
• Cisco-defined variables
Defined by Cisco for a specific sample policy.
• Cisco built-in variables (available in EEM applets)
Defined by Cisco and can be read-only or read-write. The read-only variables are set by the system
before an applet starts to execute. The single read-write variable, _exit_status, allows you to set the
exit status for policies triggered from synchronous events.
Cisco-defined environment variables and Cisco system-defined environment variables might apply to
one specific event detector or to all event detectors. Environment variables that are user-defined or
defined by Cisco in a sample policy are set by using the event manager environment global
configuration command. You must defined the variables in the EEM policy before you register the
policy.
For information about the environmental variables that EEM supports, see the Cisco IOS Network
Management Configuration Guide, Release 12.4T.
Configuring Embedded Event Manager
• Registering and Defining an Embedded Event Manager Applet, page 32-5
• Registering and Defining an Embedded Event Manager TCL Script, page 32-6
For complete information about configuring embedded event manager, see the Cisco IOS Network
Management Configuration Guide, Release 12.4T.

Registering and Defining an Embedded Event Manager Applet

Beginning in privileged EXEC mode, perform this task to register an applet with EEM and to define the
EEM applet using the event applet and action applet configuration commands.
Command Purpose
Step 1 configure terminal Enter global configuration mode.
Step 2 event manager applet applet-name Register the applet with EEM and enter applet configuration mode.
Step 3 event snmp oid oid-value get-type
{exact | next} entry-op {gt | ge | eq | ne |
lt | le} entry-val entry-val [exit-comb
{or | and}] [exit-op {gt | ge | eq | ne | lt |
le}] [exit-val exit-val] [exit-time
exit-time-val] poll-interval poll-int-val
Specify the event criteria that causes the EEM applet to run.
(Optional) Exit criteria. If exit criteria are not specified, event monitoring
is re-enabled immediately.