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As I understand it, you have many clients all located on the same physical
ethernet.

On Mon, 5 Apr 1999, Joe McGerald wrote:

> I have a large lab that I am trying to service with dhcpd. the clients are
> all running win95. I have set up multiple subnet statements in dhcpd.conf
> in hopes of circumventing the class C license limit, but I am running out
> of addresses when the first subnet is filled.
> 
> What should I do to get around this problem?

Make the declarations match the physical situation.

> # IP subnets that are alone on their physical wire should be declared by
> # themselves.   ISC dhcpd may still refer to them as shared networks in
> # log messages, but this is simply an artifact of the underlying data
> # structures.
> #
> # Note that options can be specified in the subnet declaration which
> # supersede the global options specified earlier.

shared-network LAB {

> 
> # Lab's 1st subnet (10.51.21.0) 
> subnet 10.51.21.0 netmask 255.255.255.0 {
>     range dynamic-bootp 10.51.21.10 10.51.21.254;
>     option routers 10.51.21.1;
>     option subnet-mask 255.255.255.0; }
> 
> # Lab's 2nd subnet (10.51.22.0) 
> subnet 10.51.22.0 netmask 255.255.255.0 {
>     range dynamic-bootp 10.51.22.10 10.51.22.254;
>     option routers 10.51.22.1;
>     option subnet-mask 255.255.255.0; }
> 
> etc ...
> ...

}


Alternately, you can define networks which are larger than
a Class C.  For example,

# Network with ~1000 clients

subnet 10.51.40.0 netmask 255.255.252.0 {
    range 10.51.40.10 10.51.43.254;
    option routers 10.51.40.1;
    option subnet-mask 255.255.252.0; }




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