Cisco Cisco IOS Software Release 12.2(25)S

The commands used to register the policy are shown below.

event manager applet memory-demo 

 event snmp oid 1.3.6.1.4.1.9.9.48.1.1.1.6.1 get-type exact entry-op lt entry-val 5120000 

poll-interval 10

 action 1.0 syslog priority critical msg "Memory exhausted; current available memory is 

$_snmp_oid_val bytes"

 action 2.0 force-switchover

The registered applet is displayed using the show event manager policy registered command:

Router# show event manager policy registered

No.  Type    Event Type          Time Registered           Name

1    applet  snmp                Thu Jan30  05:57:16 2003  memory-demo

 oid {1.3.6.1.4.1.9.9.48.1.1.1.6.1} get-type exact entry-op lt entry-val {5120000} 

poll-interval 10

 action 1.0 syslog priority critical msg Memory exhausted; current available memory is 

$_snmp_oid_val bytes

 action 2.0 force-switchover

For the purpose of this example, a memory depletion is forced on the router, and a series of show 
memory commands are executed to watch the memory deplete:

Router# show memory

                Head    Total(b)     Used(b)     Free(b)   Lowest(b)  Largest(b)

Processor   53585260   212348444   119523060    92825384    92825384    92365916

Fast        53565260      131080       70360       60720       60720       60668

Router# show memory

                Head    Total(b)     Used(b)     Free(b)   Lowest(b)  Largest(b)

Processor   53585260   212364664   164509492    47855172    47855172    47169340

Fast        53565260      131080       70360       60720       60720       60668

Router# show memory

                Head    Total(b)     Used(b)     Free(b)   Lowest(b)  Largest(b)

Processor   53585260   212369492   179488300    32881192    32881192    32127556

Fast        53565260      131080       70360       60720       60720       60668

When the threshold is reached, an EEM event is triggered. The applet named memory-demo runs, 
causing a syslog message to be written to the console and a switch to be made to the secondary RP. The 
following messages are logged:

00:08:31: %HA_EM-2-LOG: memory-demo: Memory exhausted; current available memory is 4484196 

bytes

00:08:31: %HA_EM-6-FMS_SWITCH_HARDWARE: fh_io_msg: Policy has requested a hardware 

switchover

95538

Ethernet

Ethernet

Primary RP

Secondary RP

Corporate

backbone