EEM works without any software. You just need TFTP server for that
Here is config
E.g Take Router's startup-config backup on 15th of every month.
Now this is a time-based task. So lets dive into the configuration.
1) R1(config)#event manager applet My_router_backup
2) R1(config-applet)#event ?
application Application specific event
cli CLI event
config Configuration policy event
counter Counter event
env Environmental event
gold GOLD event
interface Interface event
ioswdsysmon IOS WDSysMon event
none Manually run policy event
oir OIR event
resource Resource event
rpc Remote Procedure Call event
snmp SNMP event
snmp-notification SNMP Notification Event
syslog Syslog event
tag event tag identifier
timer Timer event
track Tracking object event
As you can see, you can define different types of events here. like, Interface events help you monitor a particular interface value (eg. broadcast received, input rate in bps/pps, output rate in bps/pps etc). Syslog is the most common and easy, it helps you monitor a particular syslog msg and as soon as that syslog message appears on a router you can define an action based on that (dont worry, i will provide an example of this). I hope by now you may have get some idea as to what an event does.
We will select timer since our action is not based on any particular event but rather periodic.
2) R1(config-applet)#event timer ?
absolute Absolute timer event
countdown Countdown timer event
cron Cron timer event
Cron entry is composed of 5 fields and written in this form "x x x x x"
1) Min 0-59
2) Hour 0-23
3) Date 1-31
4) Month 1-12
5) Day of week 0-7
Now if i want to say take backup on 15th of every month at 18:00 pm. So lets start from down to up.
1) Min is 00 -> 0
2) Hour is 18 (so enter as it is)
3) Date is 15
4) Month is * (when we cant specify any value, we can simply write * there which would mean no matter which month is it)
5) Day of week * ( we are putting * here since we have already defined the day through date 15, so whichever day it is )
A little bit about "*". It means "from first to last". I will show the example a bit later in this post. Keep reading...
Therefore the cron_entry will be "0 18 15 * *", which mean on 15th of every month at 18:30 pm this action will take place.
2) R1(config-applet)#event timer cron cron_entry "0 18 15 * *"
action 1 cli command "enable"
action 2 cli command "configure terminal"
action 3 cli command "file prompt quiet"
action 4 cli command "end"
action 5 cli command "copy running-config tftp://tftp-server/router-confg"
action 6 cli command "configure terminal"
action 7 cli command "no file prompt quiet"
action 8 cli command "end"
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Jawad
