dhcp failover

[Olivier Nicole]

> ISC DHCPD makes ping checks to detect ip availability. If you loose your
> lease file, I think it is not so bad, because the second dhcp server will
> detect that the IP that it wants to give is not free.

Except that many windows firewall will not let the ping get through,
so it will not detect that the IP is already in use.

A ping reply means that the IP is in use, but no reply means nothing...

Olivier