linod în papură

Whenever moving an IP alias between 2 hosts on the same network the gateway needs some convincing to update the ARP table and make the change operational. This was done with 2 linodes (as in linode.com nodes) on the same LAN and the solution was the arping tool from the iputils package. To send some gratuitous ARP advertising the new hwaddr-ip match do something like “arping -I eth0 -U -s $the_moved_IP $gateway_IP“. You get the gateway’s IP with ‘route -n’, of course.

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