[ale] how to do 'gratituous ARP broadcast'

[Jerry Z. Yu]

anybody has done a 'gratituous ARP broadcast' from a Linux box?

/sbin/arp doesnot seem to be it?
I am replacing a production box with a new one with the different NIC
(aka, different MAC addr). I want to let the gateway machine see the
the new MAC right away instead of waiting for ARP cache timeout on the
gateway machine.

thanks.

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