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  • How to clear arp cache ?
  • How to refresh arp table ?
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I assume you meant "arp cache" –  poige Feb 1 '11 at 5:23
@poige, thanks, corrected. –  Kumar Feb 1 '11 at 5:27

2 Answers 2

up vote 5 down vote accepted
arp -da

Then it's autorefreshing. :-)

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How to refresh arp table ?

You can save ip from arp table:

arp -an | sed -s 's/.*(\([0-9.]*\)).*/\1/' > /tmp/ip_to_arp

And then ping all ip:

for ip in `cat /tmp/ip_to_arp`; do ping -c 1 ${ip}; done


for ip in `cat /tmp/ip_to_arp`; do arping -c 1 -I eth0 ${ip}; done
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Can I use your script in my weblog? , I write about freesoftware and unix, linux and programming in the freesoftware world.... of course in Persian... –  PersianGulf Sep 22 at 23:26

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