On Thu, Jan 06, 2000 at 10:24:17PM -0700, Philippe Moutarlier wrote:
>
> I am doing a pretty weird thing to keep my IP but it looks like it
> is working OK :
>
> - I start the network using dhcp . give a look at the IP using
> ifconfig.
> - I change the network config to NOT USE dhcp and assign manually
> the IP obtained above.
>
> I could keep my IP over 2 months this way till the server went down
> and would not let me use it anymore. However, I don't know how the
> sverer can know if you are connected or not so I don't know how long
> you can stay disconnected and get your IP running ok when
> reconnecting.
>
> If someone has info about how the server handles this, I would be
> glad to know.
I can tell how my provider's setup works. There is fairly
constant broadcast traffic back and forth between the server and the
various clients. Clients are looking to stay in touch with the server
and vice versa. They indentify each other by IP, but are really
'finger printed' by the MAC address of the network device which is
also broadcast. The provider maintains a database of MAC addresses,
and is quite capable of identifying IPs operating without a lease.
When a client goes on line without a lease, the IP that is broadcast
is 0.0.0.0 along with the MAC. This tells the server that it needs to
assign an IP. It may also try to validate the MAC address (but not too
sure on this one). Possibly assigning your old IP first, then starting
dhcpd would give give you what you want.
--
Hal B
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