Cisco Catalyst 2960 Series User Manual

For the purpose of this example, a memory depletion is forced on the device, and a series of show memory
commands are executed to watch the memory deplete:
Device# 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
Device# 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
Device# 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
The following is partial output from the show running-config command on both the primary RP and the
secondary (redundant) RP:
redundancy
mode sso
.
.
!
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 90
action 1.0 syslog priority critical msg "Memory exhausted; current available memory
is $_snmp_oid_val bytes"
action 2.0 force-switchover
SNMP Notification Event Detector
The following example shows how to configure the snmp-server community public RW and snmp-server
manager commands before event snmp-notification is configured.
snmp-server community public RW
snmp-server manager
The following example shows how an EEM applet called SNMP_Notification is being registered to run an
EEM script when the device receives an SNMP notification on destination IP address 192.168.1.1 for object
ID 1 whose value equals 10.
event manager applet SNMP_Notification
event snmp-notification dest_ip_address 192.168.1.1 oid 1 op eq oid-value 10
action 1 policy eem_script
Syslog Event Detector
The following example shows how to specify an EEM applet to run when syslog identifies that Ethernet
interface 1/0 is down. The applet sends a message about the interface to syslog.
event manager applet interface-down
event syslog pattern “.*UPDOWN.*Ethernet1/0.*” occurs 4
action 1.0 syslog msg "Ethernet interface 1/0 changed state 4 times"
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
1748
Configuration Examples for Writing Embedded Event Manager Policies Using Tcl

Cisco Catalyst 2960 Series Specifications

General

Layer	Layer 2
Power over Ethernet (PoE)	Available on some models
RAM	128 MB
Flash Memory	32 MB
MAC Address Table Size	8000
Operating Temperature	0°C to 45°C (32 to 113°F)
Ports	24 or 48 x 10/100/1000