Clear arp cache
- How to clear arp cache ?
- How to refresh arp table ?
arp -da
Then it's autorefreshing. :-)
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