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> I was using DHCP with a resonable lease time when I needed to change my
> config.
>
> I did the changes but, since most of the machines have renew the lease
> in a short time, they stick with the old configuration no matter what I do
> with the server.
Do you mean that you changed the IP address allocation, or that you
changed DHCP options? If the latter, the client really ought to take
the new parameters when it renews. If the former, then you need to
make sure that the server knows the client shouldn't have the address
it's requesting, or the server won't know to NAK the client. For
example, let's say that you declared an address range of 204.152.188.5
through 204.152.188.100, and now you want to move the clients to
204.152.188.101 through 204.152.188.200. If you just remove the old
range and add the new one, the clients won't get NAKed, because the
server doesn't know anything about the old addresses anymore.
With version 2.0 of the server, it's tough to get around this - you
pretty much have to write a host declaration for every address you're
deprecating and make sure it doesn't match any of your clients. On
3.0 it's a bit easier - you just put the old addresses into a pool and
deny access to that pool to all clients:
pool {
range 204.152.188.5 204.152.188.100;
deny all clients;
}
Then the server will know that nobody should have any of those
addresses, and will NAK all clients that try to use it.
_MelloN_
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