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Catalyst 3750 Switch Software Configuration Guide
OL-8550-09
Chapter 33 Configuring Embedded Event Manager
Understanding Embedded Event Manager
Figure 33-1 shows the relationship between the EEM server, the core event publishers (event detectors),
and the event subscribers (policies). The event publishers screen events and publish them when there is
a match on an event specification that is provided by the event subscriber. Event detectors notify the
EEM server when an event occurs. The EEM policies then implement recovery based on the current state
of the system and the actions specified in the policy for the given event.
Figure 33-1 Embedded Event Manager Core Event Detectors
See the EEM Configuration for Cisco Integrated Services Router Platforms Guide for examples of EEM
deployment.
• Event Detectors, page 33-2
• Embedded Event Manager Actions, page 33-4
• Embedded Event Manager Policies, page 33-4
• Embedded Event Manager Environment Variables, page 33-5
• EEM 3.2, page 33-5
Event Detectors
EEM software programs known as event detectors determine when an EEM event occurs. Event
detectors are separate systems that provide an interface between the agent being monitored, for example
SNMP, and the EEM policies where an action can be implemented. Event detectors are generated only
by the master switch. CLI and routing processes also run only from the master switch.
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Cisco
IOS
parser
text
Syslog
message
queue
OIR
events
EMBEDDED EVENT MANAGER SERVER
event
manager run
CLI command
Hardware
timers
Timer
event
detector
CLI
event
detector
SYSLOG
event
detector
OIR
event
detector
NONE
event
detector
Counter
event
detector
EEM POLICY DIRECTOR
Subscribes to receive events
and implements policy actions
EEM APPLET
EEM SCRIPT
Event
subscribers
Core event publishers