Clear arp cache

Question

I assume you meant "arp cache" – poige Feb 01 '11 at 05:23 — poige, Feb 01 '11 at 05:23

score 6 · Answer 1 · answered Feb 01 '11 at 06:21

6

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

or

for ip in `cat /tmp/ip_to_arp`; do arping -c 1 -I eth0 ${ip}; done

answered Feb 01 '11 at 06:21

alvosu

Can I use your script in my weblog? http://pahlevanzadeh.org , I write about freesoftware and unix, linux and programming in the freesoftware world.... of course in Persian... – PersianGulf Sep 22 '15 at 23:26

score 5 · Accepted Answer · answered Feb 01 '11 at 05:21

5

arp -da

Then it's autorefreshing. :-)

answered Feb 01 '11 at 05:21

poige

2 Answers2