DHCP and 2 subnets

[Chris Arnold]

>Without a subnet stanza for 192.168.124.0/24 the server will not
>give out addresses on that network. The "allow members" statement above
>will restrict other clients from getting a 192.168.123.x address but
>it does not prevent them from getting a 192.168.124. address instead.
>You need to "deny members of " in that pool or set up a "124 ..." class
>and allow the specific hosts you want.

Ok guys, thanks for your patience as i get through this. Here is my dhcp.conf now;
option domain-name "domain here";
option domain-name-servers 192.168.123.x;
option ntp-servers 192.168.123.x;
ddns-update-style none;
default-lease-time 14400;
max-lease-time 172800;
class "123 DHCP Clients" {
         match hardware;
       }

       subclass "123 DHCP Clients" 00:0B:DB:C8:B1:71;
       subclass "123 DHCP Clients" 1:8:0:2b:a9:cc:e3;
       subclass "123 DHCP Clients" 1:0:0:c4:aa:29:44;

       subnet 192.168.123.0 netmask 255.255.255.0 {
         pool {
           allow members of "123 DHCP Clients";
           range 192.168.123.20 192.168.123.253;
         }
       }
class "124 DHCP Clients" {
         match hardware;
       }

       subclass "124 DHCP Clients" 00:14:A4:04:2E:C7;
       subclass "124 DHCP Clients" 1:8:0:2b:a9:cc:e3;
       subclass "124 DHCP Clients" 1:0:0:c4:aa:29:44;

       subnet 192.168.124.0 netmask 255.255.255.0 {
         pool {
           allow members of "124 DHCP Clients";
           range 192.168.124.20 192.168.124.253;
         }
       }

And here is the log from a PC on the 192.168.123 network:
Apr 10 19:57:49 mail dhcpd: DHCPDISCOVER from 00:0b:db:c8:f1:71 via eth1: network 192.168.124/24: no free leases
Apr 10 19:57:49 mail dhcpd: DHCPREQUEST for 192.168.124.144 (192.168.124.1) from 00:0b:db:c8:f1:71 via eth1: lease 192.168.124.144 unavailable.
Apr 10 19:57:49 mail dhcpd: DHCPNAK on 192.168.124.144 to 00:0b:db:c8:f1:71 via eth1
Apr 10 19:57:49 mail dhcpd: DHCPDISCOVER from 00:0b:db:c8:f1:71 via eth1: network 192.168.124/24: no free leases
Apr 10 19:57:49 mail dhcpd: DHCPREQUEST for 192.168.124.144 (192.168.124.1) from 00:0b:db:c8:f1:71 via eth1: lease 192.168.124.144 unavailable.
Apr 10 19:57:49 mail dhcpd: DHCPNAK on 192.168.124.144 to 00:0b:db:c8:f1:71 via eth1
Apr 10 19:57:49 mail dhcpd: DHCPDISCOVER from 00:0b:db:c8:f1:71 via eth1: network 192.168.124/24: no free leases
Apr 10 19:57:49 mail dhcpd: DHCPREQUEST for 192.168.124.144 (192.168.124.1) from 00:0b:db:c8:f1:71 via eth1: lease 192.168.124.144 unavailable.
Apr 10 19:57:49 mail dhcpd: DHCPNAK on 192.168.124.144 to 00:0b:db:c8:f1:71 via eth1
Apr 10 19:57:49 mail dhcpd: DHCPDISCOVER from 00:0b:db:c8:f1:71 via eth1: network 192.168.124/24: no free leases
Apr 10 19:57:49 mail dhcpd: DHCPREQUEST for 192.168.124.144 (192.168.124.1) from 00:0b:db:c8:f1:71 via eth1: lease 192.168.124.144 unavailable.
Apr 10 19:57:49 mail dhcpd: DHCPNAK on 192.168.124.144 to 00:0b:db:c8:f1:71 via eth1
Apr 10 19:57:49 mail dhcpd: DHCPDISCOVER from 00:0b:db:c8:f1:71 via eth1: network 192.168.124/24: no free leases
Apr 10 19:57:49 mail dhcpd: DHCPREQUEST for 192.168.124.144 (192.168.124.1) from 00:0b:db:c8:f1:71 via eth1: lease 192.168.124.144 unavailable.
Apr 10 19:57:49 mail dhcpd: DHCPNAK on 192.168.124.144 to 00:0b:db:c8:f1:71 via eth1

I have not been able to get to a PC on the 192.168.124 network yet (people are using them).