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New Member

clear arp table every 5 seconds

Hi all.  I am in need to have the arp table cleared every 5 seconds or so on a 2800 router.  I was wondering how I might be able to accomplish this.  Anyone have any ideas on how to do this?


clear arp table every 5 seconds

Not sure, why would you want to do this. Nevertheless, there is no such command to do it on a router. But you can use schedule a batch job to execute automatically every 5 seconds. You can accomplish this with some TCL script or use of Ciscoworks, HPNA or Kiwi cat tools. I have never used Kiwi Cat tools though for this.



Cisco Employee

clear arp table every 5 seconds


Easiast way I guess to write EEM script. I guess it should look like this:

event manager applet CLEA_ARP

event timer watchdog time 5.0

 action 1.0 cli command "clear ip arp"    

So you just configuring this in conf t mode. Though better to test that in a lab before applying to production.

More configs can be found here:

Hope this helps,


clear arp table every 5 seconds

Oh yes, forgot this completely. EEM's are awesome

New Member

clear arp table every 5 seconds

Thank you guys for your replies.  I dont know much about EEM, but Ill look into this and learn what I can.  Thanks again.