If you configure the interface, and your dhcpd.conf file has the settings in it you want for that interface you should be able to have dhcp give out the ip addresses you specify which are on the network.
The ip address you specify in the dhcp servers config file itself determines the network and therefore the interface.
If the host is specified the address specified will be assigned. If not the ip will be assigned from the range of ip addresses.
This is the basic functionality, so maybe I'm not understanding the question.
Here is an example subnet definition..
Code:
subnet 192.168.0.0 netmask 255.255.255.0 {
option routers 192.168.0.1;
option subnet-mask 255.255.255.0;
option nis-domain "dcphillips.net";
option domain-name "dcphillips.net";
option domain-name-servers 192.168.0.1, 68.63.0.5, 68.63.0.6;
option time-offset 0;
option ntp-servers time.nist.gov;
option netbios-name-servers 192.168.0.1;
option netbios-node-type 2;
option smtp-server 192.168.0.1;
range dynamic-bootp 192.168.0.101 192.168.0.200;
default-lease-time 21600;
max-lease-time 43200;
host firedragon {
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 192.168.0.2;
option host-name "firedragon";
}
host slacker {
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 192.168.0.3;
option host-name "slacker";
}
}
each subnet would have it's own definition.
Hosts that are not specified would get one assigned from this range..
range dynamic-bootp 192.168.0.101 192.168.0.200;
If you want more than one subnet on an interface setup a virtual interface with a name like this..
eth0:1
You would configure it as any other interface but it would be on a different subnet. It requires the eth0 interface to be up in order for it to be configured.
Code:
Network address
(24 bits) Subnet number (1 bit) Extended network Host address range
11000000 10101000 00000001 0 192.168.1.0 192.168.1.1 - 192.168.1.127
11000000 10101000 00000001 1 192.168.1.128 192.168.1.129 - 192.168.1.255
Code:
zeus:~ # ifconfig eth0 192.168.1.1 netmask 255.255.255.128 broadcast 192.168.1.127
zeus:~ # ifconfig eth0:1 192.168.1.129 netmask 255.255.255.128 broadcast 192.168.1.255
zeus:~ # ifconfig eth0
eth0 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx
inet addr:192.168.1.1 Bcast:192.168.1.127 Mask:255.255.255.128
UP BROADCAST NOTRAILERS MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:1219 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:0 (0.0 b) TX bytes:717138 (700.3 Kb)
Interrupt:11 Base address:0xf000
zeus:~ # ifconfig eth0:1
eth0:1 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx
inet addr:192.168.1.129 Bcast:192.168.1.255 Mask:255.255.255.128
UP BROADCAST NOTRAILERS MULTICAST MTU:1500 Metric:1
Interrupt:11 Base address:0xf000
I'm not sure how it would work, but try the eth0 subnet for the specified hosts and eth0:1 for the range of ip addresses and see if it works. I have not tried this with a dhcp server.
Code:
zeus:~ # ping -c3 -b 192.168.1.127
WARNING: pinging broadcast address
PING 192.168.1.127 (192.168.1.127) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.092 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=0.077 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=0.079 ms
--- 192.168.1.127 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1999ms
rtt min/avg/max/mdev = 0.077/0.082/0.092/0.012 ms
zeus:~ # ping -c3 -b 192.168.1.255 WARNING: pinging broadcast address
PING 192.168.1.255 (192.168.1.255) 56(84) bytes of data.
64 bytes from 192.168.1.129: icmp_seq=1 ttl=64 time=0.103 ms
64 bytes from 192.168.1.129: icmp_seq=2 ttl=64 time=0.078 ms
64 bytes from 192.168.1.129: icmp_seq=3 ttl=64 time=0.076 ms
--- 192.168.1.255 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1999ms
rtt min/avg/max/mdev = 0.076/0.085/0.103/0.016 ms
Code:
zeus:~ # route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
67.209.0.85 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
192.168.1.0 0.0.0.0 255.255.255.128 U 0 0 0 eth0
192.168.1.128 0.0.0.0 255.255.255.128 U 0 0 0 eth0
0.0.0.0 67.209.0.85 0.0.0.0 UG 0 0 0 ppp0
The dhcp servers subnet can be seen in the routing table, in this case it's like this..
eth0
subnet 192.168.1.0 netmask 255.255.255.128
eth0:1
subnet 192.168.1.128 netmask 255.255.255.128
In SUSE you copy the file /etc/sysconfig/network/ifcfg-eth0 to /etc/sysconfig/network/ifcfg-eth0:1
edit the new file and change eth0 to eth0:1 if it's named in the file. Also change the ip address.
