DHCPd: IP-Address Pools based on Client ID

Hello folks

Sorry to bother you but I'm trying to set up something nobody else
documented anywhere:

In our internal network (192.168.0.0/24) we are switching to a DHCP
server to avoid the weirdness of fixed IP addresses and users who take
any addresses at their will, no matter if they are reserved for
someone else.

Most of the operating systems offer a so called "Client ID", aka
"dhcp-client-identifier" in the DHCPd configuration file. Based on
these Client ID's we want each user to have a IP-Address pool for
their workstations.

Takes the Client ID the same notation as a MAC address? (Hex)

Is it possible at all to give multiple workstations the same DHCP
Client ID in their network preferences?

Can you define a IP-Pool rather than a fixed-address to a Client ID?


Thanks for answering!
Bastian Bense

On Mon, 08 Sep 2003 03:20:20 -0700, Bastian Bense wrote:

> Hello folks
>
> Sorry to bother you but I'm trying to set up something nobody else
> documented anywhere:
>
> In our internal network (192.168.0.0/24) we are switching to a DHCP
> server to avoid the weirdness of fixed IP addresses and users who take
> any addresses at their will, no matter if they are reserved for someone
> else.
>
> Most of the operating systems offer a so called "Client ID", aka
> "dhcp-client-identifier" in the DHCPd configuration file. Based on these
> Client ID's we want each user to have a IP-Address pool for their
> workstations.
>
> Takes the Client ID the same notation as a MAC address? (Hex)
>
> Is it possible at all to give multiple workstations the same DHCP Client
> ID in their network preferences?
>
> Can you define a IP-Pool rather than a fixed-address to a Client ID?
>
>
> Thanks for answering!
> Bastian Bense

I do the following to setup fixed addresses in my dhcpd.conf file (example
for a Dell notebook):
#Dellbook fixed addresses
host dellbook {
# hardware ethernet 00:B00:BD:F8:CF;
hardware ethernet 00:B00:0E:C8:33;
fixed-address 192.168.1.252;
}
host db2 {
hardware ethernet 00:10:A4:79:14:A7;
fixed-address 192.168.1.253;
}

The notebook can get only get one of two addresses when it is logs on as
it is either docked in which case it is assigned 192.168.1.252; when it it
roaming and using its pcmcia card, it will be assigned 192.168.1.253.

Desktop machines as a rule only have the one NIC, so I simply give them
one address based on example shown.

Marvin
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